Oil In Coolant "What to Check when you find Oil in Antifreeze"

There are a number of things that can cause oil in your coolant. In this video, I will show you how to check the engine oil cooler on a VW along with many other tips that will help you find out how oil is getting in your coolant overflow tank.
Oil coolers and transmission coolers are very comment causes of oil in the coolant so you want to rule these things out before suspecting a blown head gasket problem.
VW oil cooler: amzn.to/2Gqm4lG
Head gasket tester: amzn.to/2IiYqUo
27mm socket: amzn.to/2pSGHMG
My video on checking for a blown head gasket: • How to tell if you hav...
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Reggie Curtis The Flat Rate Mechanic. 25 year ASE Master Automotive Technician and Advanced level ASE certified. #FlatRateMechanic #DIYAutoRepair #FixIt Check out The Flat Rate Mechanics Tool Store on Amazon goo.gl/M8MpdC  
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Disclaimer:
Due to factors beyond the control of The Flat Rate Mechanic, it cannot guarantee against unauthorized modifications of this information or improper use of this information. The Flat Rate Mechanic assumes no liability for property damage or injury incurred as a result of any of the information contained in this automotive repair video. The Flat Rate Mechanic recommends safe practices when working on cars or trucks with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this repair video. Due to factors beyond the control of The Flat Rate Mechanic, no information contained in this automotive repair video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained.

[@FlatRateMechanic]

Things I used- Oil cooler: amzn.to/2Gqm4lG Head gasket tester: amzn.to/2IiYqUo 27mm socket: amzn.to/2pSGHMG The one tool every mechanic should have: amzn.to/2FN2r70

[@user-pd4px6sk6d]

Hello I have a problem regarding golf 5 gti 2006. It is a little oil in the water. I have opened the lid they have cleaned have a mild flake but still dries a little oil. It has a cooling oil cooler with which this yoke is not genuine is japan. What can happen?

[@chuckwoolery8668]

The Flat Rate Mechanic I have some type of oil in my radiator. When I bleed my radiator it came out looking like coffee with creamer. How do I find the cause of this. Especially when it leaked onto my timing belt

[@chuckwoolery8668]

I have an 08 impala v6 3.5

[@Aushaun2005]

I have a 2008 vw jetta 2.5L and i have type substance in my coolant. I have ordered transmission cooler for the car I was going to change the cooler and flush all of the coolant out of my car and add more transmission fluid to the car. I have stopped driving the car because it stalls when Switching gears in automatic but it changes gears in a manual just fine. Do you think this will solve my problem?

[@girohead]

Would a shop test the cooler like that or just replace it, and everything in sight? Impressive, honest mechanic.

[@VenenoIII]

Everyday I learn something new about what could happen to my car and everyday I say, not another thing

[@brookferrington6120]

The one thing you did not check was human error, very common nowadays that none mechanical people place oil in modern car in any hole they can find and coolant in the closest hole possible. Always keeping mechanics in work.

[@FlatRateMechanic]

Good point. Anything is possible. I have seen some crazy stuff!

[@johnkraus8941]

At 5:15you meant just the opposite Oil leaking into the coolant?

[@quevicular]

Yeah it's awesome when they mistake the transmission fluid dipstick for the oil dipstick and dump 30 weight into your transmission. $5,000 later and it's almost impossible to prove positive who put the oil in the wrong hole. People are so stupid they cost you a lot of money and headaches

[@mc-bw7bn]

Yeah few months ago I accidentally put auto transmission fluid in oil because I need glasses and the bottles looked so alike it didn't go very well

[@jeffsquire4101]

Another quick way is to leave the oil cooler mounted to the engine and remove the water hoses and crank the engine up and see if oil comes out of the water ports, it might only leak with the engine hot

[@rje613]

Not a bad suggestion at all. Great idea!

[@eugenepruitt4369]

Thank you I think you kind of answer my question there's one other won the rule out on a 6.6 turbo diesel thank you

[@chaunceythefrog8608]

I would assume that the reservoir had to be changed, with the oil in, it has a sensor... Also thermostat, temp coolant sensor, fan switch, gets all affected... What do you think...

[@ivanm.3522]

Very good video with outstanding camera views.

[@MichaelHall-dn5ms]

Great video. It's made me learn something new about my A3. Since owning the car, I have done a few long trips like 3 to 4 hours in the car. But no over heating. I don't have obvious signs like Mayo on the oil cap, think it's a head gasket. But I got a head gasket tester. The results were - yellow means it's a headgasket Blue means nothing wrong with it And green means possible headgasket or possible contamination. My A3 got GREEN. I don't have oil in the coolant tank like this car does, but is it worth changing the filter and flushing the system, then putting new coolant in? Hope to hear from your reply soon. Thank you.

[@AltruisticWarrior]

Very very likely if you have the same type of cooler like the video, it's the cooler. I'm now on my third one at 200k especially if the coolant is just murky and rusty looking.

[@xhoustonkingx6212]

Figured it was the oil cooler because the sludge matched the motor dipstick. Same thing on mine. The only other thing though is depending on the vehicle it may be a water pump?

[@shamanosarcasm9800]

I have a 2006 Audi A4 cabrio and I just had the same thing happen to me tonight. Is this a common problem with VAG (VW, Audi, lambo, now that they cross parts on engines) autos? Great video! I'm going to flush my system tomorrow and trace coolant lines!!

[@smileysatanson3404]

when you drive so long and unlock the secret gravy compartment

[@fishin360]

If it’s the oil cooler, will you still see white smoke and get the sweet smell at the exhaust?

[@bhugeloo95]

I've had the same issue and my oil cooler was indeed bad, it was around 40 bucks and got it changed, the flushing process is taking the most time here

[@KOTalk]

I'm on my 10th flush 😭😭

[@robbylebotha]

I had the oil cooler and transmission oil cooler replaced and it was flushed 5 times and it seemed clean enough. Now I have oil in the cooler again and I really can't tell if it's from before or new(still leaking into coolant from another place). Really at my wits end.

[@ibrahimsalamah7363]

​@@robbylebotha any update bud, I also replaced both engine oil cooler and transmission oil cooler and the coolant is still mixing with oil and I'm not sure if it's old or new

[@rje613]

@@ibrahimsalamah7363 Did you ever figure it out? I would presume it was a bad intake or head gasket?

[@Ahmad-tx5dr]

@@robbylebothahi, it is possible the coolant entering to inside transmission?

[@auxmike]

I would want a new OEM oil cooler installed. I wouldn’t trust that old part anymore.

[@faxxzc]

why? it was literally tested to be good

[@danielebressan357]

What was the issue at the end? You left us without an answer to the case.. it is like a tv series 😁😂💪🏾

[@FlatRateMechanic]

This one did have a bad oil cooler.

[@keepinganopenmind8216]

@@FlatRateMechanic Pulled mine yesterday, figured it was a bad oil cooler, replaced it, ran the engine drove the van... haven't yet flushed it, it was not getting more then a few drops after driving for an hour or so. I will flush it this week, The point I want top make was I tested my old oil cooler, compressed air as well.. it did not show any signs of leaking .. BUT as you mentioned, it may have been leaking only after the engine reached operating temp. Thus is there a way to test the oil cooler.... at temp off the car ? I haven't yet come up with a way to do that !@!!!

[@traceybartee4575]

I have 2013. Mercedes Benz 300C 4matic is doing the same thing. I have oil in my coolant. This is common problem with that year

[@user-xj7dp7su1u]

I have the same problem with my ram 5.7 and no coolant when I drain the oil or the dip stick

[@jaerod1982]

How do you clean the oil inside the whole hoses and radiator? I coolant flush ? But what liquid is best to get everything out ?

[@jamesnotah2302]

Fors recomends flushing with a degreaser like simple green.

[@OluwadareAlonge]

My golf stopped selecting after I discovered oil in my radiator. Will it select again if change the gear coolant

[@alicutz79]

Hello sir, i have changed twice the oil cooler on my 2002 passat, twice we clean all the hoses but still my coolant reservoir its still full of oil

[@project370z]

Head gasket?

[@alicutz79]

@@project370z it was not the head gasket, the second oil cooler ( new bytheway) was broken inside too.....this is whats happen when we dont buy original parts....yeah, 50 dollars new oil cooler...flush up the cooling system, mount original oil cooler ( 200 usd), now all is clean

[@mphomathebula9260]

I changed mind twice hoping for the best

[@bravewarrior33]

@@alicutz79 I am having problem in VW Touran, oil mixing in coolant although no sign in sensors and no overheating issues. So need to change oil cooler?

[@alicutz79]

@@bravewarrior33 i have changed 3 oilcoolers, untill i bought original parts.If you buy, buy original oilcooler, is arround 250 euro but it will do the job.All Volkswagen have this issue sooner or later, unfortunately, if you dont change that oilcooler soon, the heater will block inside and you will no longer have heat inside in the winter

[@brandons2320]

Yep you need more pressur. Had same issue . It wont lea untill put on heat or more highee pressure

[@willienix4673]

If you bypass the old cooler what will happen

[@Jimbo8012]

Hello Flat Rate Mechanic, got a quick query. Hopefully, you see this comment and can answer. :-) I've got an 2011 Opel/Vauxhall Insignia CDTI that I use as my workhorse car. It's got 65,000 miles on the clock and has got oil in the cooler. Hoping it's not a head gasket because they're a nightmare on Insignia's. It'd be a shame to scrap or sell it distressed as it's a good clean car in great condition (exterior and interior). 1) There's no visible white smoke. 2) There's no smell from the exhaust. 3) No milky coloration in the oil. In fact, oil seems fine. 4) No steam from the engine/exhaust. 5) There's no overheating...needle stays at 90 all day long. 6) There was slight diminished acceleration up a motorway/freeway slip road followed by a "coolant low, top up" message on the dashboard but I've driven it 25 miles since with no incident. No limp mode, no significant reduction in performance. What do I find slightly concerning is that there seems to be more oil in the coolant even though I've not run the car for 24 hours. Most of it's still pink with a small grey head. Plus, there were some very small bubbles in the radiator after running it according to Halfords Autocentre. Do you think this is an oil cooler issue or a head gasket issue? Mechanics/Engineers I've called seem split on the issue.

[@simatin19]

I literally have this this morning on my golf 4 and I sent it to a mechanic but I was buzy , what would you guys suggest I ask to prevent em from ripping me off?

[@xxastudxx]

something i learned in another video is "bypassing" the oil cooler to see if you still are getting the fluid in the coolant is a potential way to test the oil cooler.

[@tucsonmclean5138]

Hey....I've got a Bora 1.6 and having a problem with the transmission oil mixing with the coolant...the video is helpful..but am wondering if their would be any water in the transmission... how do I go about solving this problem..the previous owner of the vehicle had it parked down for some time......

[@mtbjonny9502]

I stopped repairing German cars because something else always breaks and the customer is then dissatisfied with you and not with his car. These (all German) vehicles are built to break down after 4 years (normal leasing period).

[@evieemaya88]

Great video. Was it the oil cooler in end?

[@FlatRateMechanic]

Yes, it was.

[@12Lamer]

@@FlatRateMechanic i got a similar issue on my VW where engine oil leaked into the coolant via engine oil cooler, do i need to change the waterpump as well since engine oil got into it?

[@FireicerCooper]

Actually it's the other way round coolant is done like that to warm the oil up faster on cold days then keep it cool when running but mostly it's to get the oil up to temprature faster

[@raesonn]

How so you flush coolant reservoir? With oil cooler off? Water hose down the reservoir until it runs clean?? Any help would be appreciated!!

[@user-rl2hv1kx8i]

besides de oil cooler and the head gaskets, what else could make the oil leak into the coolant reservoir???

[@stanmarsh912]

I have some gunk in my coolant resevior but it's more of a whiteish lighter brown color but it doesn't seem like it really mixed with the coolant.. sort of just floating on top of the coolant.

[@joshturner9584]

Im not sure if my 2008 kia rio5 has an oil cooler but there is oil in the radiator hose and in the coolant but it has not mixed with the oil

[@rodolfolongoria2843]

I have green slugs coming out my top hose going to my motor

[@robertramjam913]

Hi, I have a 2001 Honda Civic 1.7 vtec. Temp gauge was reading normal but blowing cold air then temp gauge rose very rapidly. Was not far from home. I bought a thermostat figuring that was bad. Anyways, black oil junk in coolant resivor. Oil on dip stick very black even though just changed recently. Not sure what to do.

[@donaldhartfield6616]

I have an 2008 Audi a4 2.0t s-line that just done that same thing. When it does that does it make the car run rough and affects the oil pressure?

[@shottaflick0072]

I have a 910 bluebird I have a little oil on top coolant and in radiator car runs normal with a little as smoke and no over heating car runs normal

[@pacepace3316]

Hello I have a 2003 mercedes benz ml 500, I found a light brown fluid in the antifreeze reservor. I check oil nothing on oil dip stick, I just purchased the transmission dip stick to if transmission fluid and antifreeze are mixing, the fluid I'd brownish not pink. What you think it might be. And how to resolve this issue.

[@isshayasebaaly6408]

Helow man thanks for sharing this info, I have a question, i have a seat corduba 2009 and i sow some oil in the water tank sow i go to the automatic transmission oil coolar to now if is mixing oil and water but how can i now if it s the problem?

[@johnodonnell-pd2vv]

How do you get rid of the sludge that migrated through the system heater core ect.

[@elizabethoh8997]

Hi my honda crv 2010 has oil in the water. My question is does honda crv have a oil cooler

[@emmanuelteeth5422]

I have a bluemotion 1.2 tdi and it's mixing oil in the water reservoir, and noticed the dipstick is dry ,what may be the cause

[@Jesse-qg7hp]

Hey buddy great video I did something stupid I put about a quart of oil in my overflow antifreeze overflow and when I realized it I quickly took the Overflow container off poured it out and now flush the system like 3 times but the weird thing is is the car won't start ever since I put the oil in the Overflow container and realized it right away I didn't start the car so it never ran through the system all the way and it just won't start at it since I flushed it out three times I've tried starting it and it just keeps turning over and over and over and I was wondering if it is that quincentennial or is that just weird timing that maybe something else broke too thanks a lot buddy and it's on a Cavalier 02 Chevy Cavalier

[@jessesilva7448]

What about on a ford f150 change the oil cooler twice and gasket over heats still have that problem had the engine rebuilt by certified mechanic please help thanks

[@simonsaul9499]

I have a golden trailblazer . The oil was super low so I refilled it and found out the coolant was low as well but I couldn’t open it up becuase it was presurized , after I let it cook I filled coolant and now the van is leaking this Grayish sludge mixture , it leaked while the van was off but I drove without the engine temp over heating , it stayed way below the half way mark, but now when I parked the van more of that Greyish sludge comes out , what do you think could be wrong ?

[@shacacruzlemerocya8167]

I have a 2014 Chrysler town and country that has the same sludge in the radiator. How should I troubleshoot this type of vehicle?

[@Bhurzeneger]

it means the transmission cooler is working. so the mean cause of oil mix to the coolant is head gasket replacement

[@richprilliman1820]

I noticed in my 2008 F250 6.4 Diesel a Butterscotch creamy substance in my Degas bottle. So, I flushed system out about a month ago. But, now I'm having a hard time moving shift arm into gear and transmission not smooth. So, I checked degas bottle and transmission stick. Dang if it the creamy stuff wasn't in both places. An area mechanic said I probably need to flush again plus get transmission flushed then replace my radiator. What do you think???

[@BrownPridePHX602]

Hi I have a 2002 Chevy Blazer the oil is white milky and the oil reads high the coolant is clean no overheating but the coolant is low no white smoke from exhaust do you things it's a oil cooling or head gasket

[@MajedSZ]

I found oil in the coolant, I think its because the engine oil is always getting low, Although there's no overheating.

[@johncurry821]

How do you determine which failure for oil in radiator but not visa versa 13 Impreza 2.0

[@nazirhussain7354]

Hi, I am not sure if I have a blown head Gasket or not and whether to use a head gasket Sealer. Basically I have oil deposits in my coolant tank, oil has leaked into my coolant resovoir and and a layer of around 2-3mm builds up and sits on top of the coolant. My car is a Peugeot 207 1.4 Petrol 2011 model with manual gearbox. I have been driving it fine for nearly 3 years with this issue and have done approximately 12000 miles since I first noticed this. When I take into into the garage they seem to think it is a blown head gasket. There is also a small oil leak on the cylinder head on the left hand corner.

[@Douglariser]

Sounds like exactly the same problem on my 2010 Audi A4...but after watching this vid I suspect Oil Cooler may be the problem..I'll know 2moro

[@wildfruits477]

I replaced my oil cooler on c4 grand Picasso, and oil still going in water bottle, been told engine sounds to good to be head gasket, does not smoke runs normal, no loss of water so…… dunno what else it could be

[@fallenone6]

If the block tester does not turn yellow can you re use the fluid or does it need to be thrown out?

[@tucsonmclean5138]

I've got a Bora....and am seeing oil in the coolant reservoir.....my mechanic said I have to get a new engine..

[@kantrykangtv7327]

Hi I have vw bora 1999 it has 93 thousand kilometer manual transmission the car doesn't overheat doesn't smoke I mean no white smoke coming from the exhaust there is no milky or oil on the coolant tank no milky on the oil deep stick doesn't loose coolant But I see milky on the oil cap My question is what causes that because I don't know if it is head gasket blown or wht

[@damianwalaszczyk9626]

Foe, the cause might be that you drive on short distances. If your oil and coolant doesnt warm up enough it might cause the cap to be muddy. Try flooring it around the city to warm up the engine to the right temperature then drive on a higher rpm for a bit and see if it fixed the issue shorty

[@jockdeeznutz]

I have oil in my radiator thats causing my car to overheat. I checked the engine oil and no sign of coolant and looks normal. My car has no loss of performance and I did the combustion gas check and no signs of a blown head gasket. I’ll assume its my oil cooler? Does a bad oil cooler cauae overheating issues?

[@richardleslie339]

How did you get the intermix out of the reservoir, coolant lines and radiator?

[@FlatRateMechanic]

Fushing the system with this stuff is the only way amzn.to/2NU2CQh Then running clean water from your hose though coolant system and refilling with right coolant. That oily mess is a pain to get rid of and will take some flushing and cleaning.

[@Mrdanilovega]

I have oil in my radiator reservoir I do have a code P 1157 I don’t know why I have oil in my coolant. I change my radiator. I cleaned my coolant reservoir and it still has oil in it. Do you happen to know what it could be. This is a 2003 Honda accord LX 2.4 for doors.

[@macknumber9]

Did this in fact end up being the oil cooler? Do they make test kits to tell if its oil vs transmission fluid?

[@aydensamy3002]

Sir I have Nissan wingroad 1.8 and same problem I have.my car was parked for 6 months and now I m starting with new battery it misfires with check light n temperature light pop up n oil is coming out from radiator cap when I open .wat you thing the problem is.n how to fix it.

[@vcmdpropulsion126]

the thing is, your test would only be positive if the cylinder was to blow into the waterways, overhead cam engines have a oil passage from the block to the head that is more psi then the cooling system. and when it blows out that way the oil system feeds into the cooling system .

[@FlatRateMechanic]

This is very true and a great point to bring up. It is very very rare for oil to leak into coolant through the head gasket unless the car has been overheated and the head is warped. Headgasket is designed to hold back over 200PSI in combustion pressure so unless the car has been overheated it is pretty unlikely to have 30psi of oil breech that seal. But as you have stated not impossible. And if the car was not showing any signs of overheating would probably be on of the last this I would consider.

[@wesleyedwards2764]

I have a bunch of goop in the cooling system of my 3.9 Impala. Looks like peanut butter pudding, latte color. car runs fine - no smoke engine seems strong. No sign of water in the oil or transmission. I'm hoping it is the transmission cooler. It's thick and nasty. Very hard to flush any of it out. It overheated and I parked it immediately. Any suggestions for cleaning it out? I have heard that soap for the dishwasher, due to its lack of foam will work to flush the stuff out. I'm thinking that I need to seal the radiator off and pressure test it. It has so much gunk in it though I don't know it that would work.

[@FlatRateMechanic]

Wesley Edwards lower intake gaskets very common on that motor

[@noneofurbiz7459]

have the same problem, thick muddy peanut butter type liquid that seperates from the coolant/water. picking it up from mechanic tommorow but came to the conculsion that it must be a leaking oil cooler as the pressure from the oil cooler is higher than the pressure from the cooling system. so new oil cooler and going to drive it around for a week with a stripper in the system then in a week take it in for another flush then refill with coolant

[@The.Plague]

@@noneofurbiz7459 Out of curiosity, did the replacement cooler fix your issue?

[@cameroncollins3425]

Hey! Thank you for your information.. Let me give you the run down.. 01 4Runner 6 cylinder... Transmission cooler is built into the radiator.. Took my truck to Toyota dealership 3 days ago.. Diagnosis was tranny fluid and coolant had mixed together.. They replaced my radiator with a new one.. Flushed tranny twice.. Paid and drove off the lot and got home to check my coolant reservoir. Mud milkshake!!!!!! Returned to dealership very upset.. WHile driving back tranny was shifting hard. Almost slipping a few times.. No overheating from what I can tell on gauges. Being that they replaced radiator, flushed tranny and told me all was well I trusted it was fixed.. Obviously not. Can you advise me on what to do or to be aware of at this point???? Thank you sir..

[@FlatRateMechanic]

Well unfortunately once coolant contaminants transmission there is a high probability that they'll be permanent damage caused to the transmission. Flushing it out several times is your best bet In hope that it will save it. It's really all you can do. And as for the sludge in the overflow tank chances are it was probably just residual. It's really hard to get all that stuff out of the system once it's in there. I have successfully flushed transmissions in the past but we also make sure the customer is fully aware that it could possibly not help at all. Best of luck.

[@cameroncollins3425]

The Flat Rate Mechanic Thank you sir for replying.... Let me ask you this.. After many KZbin videos and research I had learned when coolant and tranny fluid mix together due to a bad intercooler one is supposed to flush the engine as well because the coolant runs through the thermostat and such also. Causing that fluid to be present in other parts of the engine. I know they didn’t do and engine flush. They also didn’t replace transmission fluid filter.

[@FlatRateMechanic]

They should have done both those things. Yes.

[@TheRichard4098]

I don't no if your still on this channel are not but if so got a question for you , My friend had me come to his house today to look at his 2002 Ford Ranger Edge 4.0.. He said someone told him the water pump or the transmission cooler was leaking, When i checked it out it was a big hole in a water hose that come straight up from his water pump to around his intake about 6 inches long.. well I took that off but I noticed the water was oil pink really bad, and so is the inside of the radiator... It looks like his transmission lines is running to a separate transmission cooler that is not part of the radiator that someone installed before he even purchased the truck.... its not leaking... would that cooler still cause fluid to back up really bad into his radiator even if it is not leaking the transmission cooler is not leaking?

[@ajithbaz]

i been trying to get an answer .My Skoda has issue with gear oil fluid over heating when i travel long distance suddenly i could feel m driving only in the first gear and its not shifting ,and over heat sign comes up also in my coolant i can see traces of oil .pls tell me is it time to give to scrap or is it fixable?

[@BakheNakile]

Hello sir If you just done service a week ago and you start having this problem could it be anything to do with the service?

[@bravewarrior33]

Why sensor not warning overheating issues when oil cooler fails?

[@davidvogel9362]

@the flat reight mechanic Bought a 03 jetta. Replaced the turbo, alternator and battery. Runs great although i see water coming from the exhaust? I put a small line on the antifreeze reservoir so see if it was goingdown and sure as shit its going down slowly. Only problem is that my oil and transmission fluid look fine..... could this be a start of a blown headgasket or can antifreeze get into the combustion chamber another way?

[@sanjayKumar-en9oe]

Can a oil cooller problem could lead to engine piston breaking

[@billyhensley592]

Maybe you can help me I have a 1999 ford f150 4.2 v6 it' looks like it has oil in my overflow tank does it have oil cooler on it

[@project370z]

Why u didn’t check pressure in cylinder? Maybe is just blown head gasket? Combustion leak test for CO2 as well will be good to do.

[@WestcoastAudiGuy]

Guess you didn't watch the whole vid... He clearly did a co2 test

[@tclll2984]

I have a 2002 Jeep Liberty the coolant tank has a thick brown sludge (thicker than in this video) what could it be? Please help!

[@beelindamartinez5765]

Mine is looking like and doing the exact same thing except mine Volkswagen is over heating soo any guesses?

[@charleshines1553]

I have a similar situation with my 2013 Passat. No signs of anything weird in the motor oil anyhow and so I am worried my cooler transmission cooler bit the dust.

[@Kamal_AL-Hinai]

My 2016 challenger has the same issue. I actually had the car parked and when i returned it was overheating, so i turned it off. Cooler was empty, had to buy and pour it in. I'm going to a mechanic tomorrow so see what the problem is.

[@facts-explorer428]

I need to know how to fix the problem?

[@michaelalire4891]

I am having this problem on my vw passat 2013. But I'm overheating do u think it's the oil or transmission cooler?

[@edtwin88]

How many times did you flush the system, and did you take any additional components off when you flushed (thermostat, waterpump, radiator)

[@keepitmoving5440]

Good question coz 1 fuel trim premiter is on the thermostate sensor , if its caked in oil the engine may run rich as it gets inaccurate reading on coolant temp

[@psystealth]

Theres oil in the coolant tank on my diesel Perkins 4.236 sailboat engine.....do the same principals apply? Can it be the fresh water pump shaft seals?

[@Aushaun2005]

I have a 2008 vw jetta 2.5L and i have the same problem with it being oil or transmission fluid in my coolant. I stopped driving it cause my transmission started hesitating to change gears in automatic but it changes just fine in manual. I have ordered a transmission cooler for the car and I was going to replace the cooler and flush the radiator coolant out of the car and add more transmission fluid to the car do you think that would solve my problem?

[@hoesssaaayyymyname5734]

Hello this is happening to my ls1 ss Camaro 99 but my oil pressure drops to 10 and I'm think its head gasket

[@justarsim4810]

when i changed oil i noticed that it is mixed with water.. in water tank doesnt have oil. what is the problem

[@jackgraham4803]

Ok what was the reason of oil mixing water ?

[@MR-lv6lp]

hi, I just bought a 08 Chevy cobalt a couple weeks ago and it was running fine..besides the o2 sensor, I got the o2 sensor switched out and not even a week later my car started over heating, there is deffinetly oil in the reservoir tank?? do you think this is because of a blown head gasket??

[@AlbertoHernandez-vc2xy]

Hi how can I check if my oil cooling system is working well on my BMW x3 2007 I did find some oil on the cooling reservoir tank

[@dennisseesparza2515]

Hiiiiii. I own a 2010 BMW 328i has about 105k miles an there is some oil in my coolant. I've taken my vehicle to several shops but no one can give me a definite answer and I'm scared it's going to result in more serious issues because now my car is sounding rougher. PLEEZ help. 😣

[@samantharamos2550]

I have a Nissan Altima 1998 and pas oil in the radiator what should I do to fix it

[@nicholasramoroa7642]

My 2007 is also having similar problem

[@michaelmorante315]

Whats the update on this is it the oil cooler

[@e_productions]

I have c15 cat diesel. Do you thing oil cooler issue?

[@hilary3397]

I have a Similar problem in my Chevrolet aveo...

[@JosePerez-nk2lf]

Did you find out what was wrong

[@lindokuhlendabezitha1918]

hi i have a vw mk1 and i think oil and have mixed because i see dust like colour in oil tube how fix it

[@youngstayoung6633]

So was it a rusty radiator from using tap water

[@verypery905]

I have the same car. Was it actually the oil coolant that you changed

[@FlatRateMechanic]

Yes it was the oil cooler

[@alvaro93364]

@@FlatRateMechanic where did you get the caps?

[@zolilemekana5259]

i have the very same problem with my vw polo 1.6 hatch 2009 oil in water reservoir but no mixing in engine and my polo does not have oil cooler...ive sent the head cylinder for pressure testing but the head is ok and ive changed the head gasket wat could b the couse??????

[@FlatRateMechanic]

I would be suspecting trans cooler then.

[@johnnymotors2023]

@@FlatRateMechanic I have a VW Polo SE 1.4 petrol 2007 and I have manual transmission, and I have the same problem with the coolant but the coolant stays pink and clean and just the expansion tank and cap gets dirty. So how can I find the issue here?

[@nothingucantdo5568]

I'm sorry... That's the difference between guessing and testing... You did it 💪 yes, but..... What was bad??? I've had many times it will only leak when it comes up to temp. YT Tech's will never know....

[@coolbema]

hi i have lancer 2006 . I noticed slightly creamy stuff when i open the radiator cap, it wasn't too much so i cleaned it with cloth but my coolant keep on reducing i checked engine oil regularly but found no signs of problem no heating issues so i then checked ATF which was perfect on level so not sure if it is ATF in coolant or engine oil :-(

[@jordanlittle5391]

Sell it. Dont say anything

[@pooorman-diy1104]

my radiator is filled with oil ... pretty sure there is leak in oil cooler ... it's a diesel engine .. I will put plugs at coolant passages in the oil cooler as temporary fix .. I guess thats will be fine ..right ?? ..considering not all engines have oil cooler ...

[@josepeixoto3384]

Absolutely YES; oil cooler is for VERY HIGH speed driving in hot days: NEVER needed for calm everyday drives.

[@damianwalaszczyk9626]

Jose Peixoto Not true folk, oil cooler was made to prevent the "cold start" on the startup. Oil warms coolant-coolant warms oil its a two way beneficial system that prevents overheating and slightly warms the engine faster on a cold start

[@pooorman-diy1104]

@@damianwalaszczyk9626 but not all engines have oil cooler .... so it's not a necessary thing ..

[@damianwalaszczyk9626]

@@pooorman-diy1104 Never said its a necessary thing to have in your car. What i said was that it is beneficial to the engine, please read with understanding next time. My answer wasnt meant to you, but the other guy that said that it is for high speed races which doesnt make any sense and thats not the reason it was invented.

[@wiseade9851]

Mixing two different types of coolant can cause dis problem

[@UltimateSG15]

i did that and that happened what should i do to solve the problem ?