DIY Leak Down Test on a Toyota Diesel 1HD-T 80 series Land Cruiser

[@LockyourHubs4WDing]

Compression Testing or Leak Down Testing, what's your favorite and why?

[@Wayne-Kerr_Rudy-Zarzoff]

Doing both.

[@nategmaycock9398]

CT provides more questions LD answers them all 😅

[@Ghostrider-71]

This was an excellent synopsis/diagnosis video. Very helpful and cheers from the USA.

[@LockyourHubs4WDing]

Thanks!

[@socram321]

I have a similar leak-down tester. I learned after many frustrating tests that it was only accurate if I went from Negative to 0 when setting the tester. But if I pass 0, then returned from Positive to 0, it was unreliable. ...for what it's worth.

[@LockyourHubs4WDing]

Thanks for the tip!

[@bobbyannis2901]

Thank you. Brilliant video. I learnt something new. Cheers

[@LockyourHubs4WDing]

Cheers!

[@seanlittlefair105]

As the oil down the bore, in the compression test video, didn’t show a significant change to the compression, I thought it pointed to a crook valve seat or something of that nature. Thanks to this video, I see that the leak down tester is a handy tool to stop amateurs like me from jumping to expensive conclusions. Thanks for posting. You’ve got a great channel.

[@LockyourHubs4WDing]

Cheers mate, once the head was removed, unfortunatley number 2 piston had a hole in it.

[@berniemac8413]

@@LockyourHubs4WDing what do you do in instances like that? Do you toss out the engine? Or replace the broken components?

[@LockyourHubs4WDing]

It would depend on the cost of the engine. The diesel 1hdt in the 80 series is a reasonably expensive engine. So the engine was rebuilt.

[@berniemac8413]

@@LockyourHubs4WDing gotcha. I purchased a 2005 Mercedes Sprinter 2500 with the 2.7L 5 cylinder Diesel 647. It’s rebadged as a Dodge to circumvent the importing taxes into the US. It has tremendous amounts of blowby. The oil cap dances all over the place when I unscrew it and it smokes like a chimney. These engines are known to hit a million miles if maintained properly. And due to the age, they stopped making new ones. They sell re-manufactured ones for $8-12k. And that’s quite a bit considering I paid a fraction of that price for the entire van. Is rebuilding the engine something you can do at your home? Or is it a task that should be left to the professionals?

[@LockyourHubs4WDing]

Other than the machine work, with a decent set of tools, a home mechanic can definitely rebuild an engine. I know, been there, done that!

[@scrooge8117]

I like it but I would love it...if I could save it to a playlist to find again later

[@LockyourHubs4WDing]

Thanks!

[@reinhardtrippmacher8776]

Thanks for the video. I use this procedure as well on my 1HDT. I use the same gauge. Unfortunately I think I blew up the right gauge. Normally you should be able to 100psi on the left gauge and and the right gauge should go to 0. But I see on your gauge it is the same as on my gauge. 50psi left and right on 0. I personally think that this 50psi are not sufficient for diesel engines which have 500psi pressure. In my case I did a CO2 test which indicated a combustion leak into the radiator. The fluid turned yellow. I also have always a rising pressure in the coolant system. A compression test showed me a max difference of 1bar. All were from 31 to 32 bar. So I did a leak down test on all 6 cylinders but none of the cylinders leaked air in the coolant system . I replaced the right gauge with a common 140psi gauge and put 100psi in the combustion chamber. I didn't have significant leaks through rings, valves and I had not a single bubble coming up in the rad system. I do have to say that the engine was cold. I do see tiny little bubbles ( very tiny) in the rad cap while the engine runs for 5min and warms up. So i suspect it must be a tiny little crack somewhere in the head which only expands under heat. I will need to take off the head now and do a crack test with my DIY jig for that head. Hope that comes out negative and I just replace the head gasket and I am good again. I can still drive my 1hdt for 100km and the temp stays normal. I just have to release the pressure from the radiator every 100km...otherwise I might blow that. What are your thoughts?

[@BarryGlenOZ]

i have that leak down set.. the hose and the quick release need to be changed. the quick release holds pressure.. the house just needs to be bigger

[@td42dirtygq]

When is the next episode keen to know what's happening when the heads off nice videos by the way keep it up 👍🏾

[@LockyourHubs4WDing]

Thanks mate, were were just discussing that today! It's coming soon.

[@heftymerv]

thanks, for doing the leak test. Looking forward to the rebuild series now...lol... I feel the big fella's pain....lol..

[@LockyourHubs4WDing]

He's hurting!

[@heftymerv]

@@LockyourHubs4WDing how did it all go, or did he give up and buy something else?

[@LockyourHubs4WDing]

@@heftymerv just returned from the mechanics over the weekend, you can't keep a good 80 down!

[@steveandsara7240]

just wondering what it ended up being, gasket, rings or piston. would it be possable for example to add oil into cylinder and then test again, (like you on compression trst). im thinking if it was the gasket it wouldnt make much difference, but rings or piston it would initially improve the reading. cheers

[@LockyourHubs4WDing]

It was a holed piston unfortunately.

[@steveandsara7240]

cheers. would help diagnose a gasket.

[@ForPropertyInvestors]

The compression test pretty much concludes the same thing do you think. If you started the vehcle with all the glows in etc and took the oil cap off there would have been enough blowby to tell you it's loosing air into there as well. My HZ is doing it with bad blowby and white smoke after AdBlue was ran through the tank. Wrecked injector pump and looks like engine too.

[@MrLevi136]

Great video. You mentioned that you connect to 100 psi and zero out your right gage. Your left gage it shows only around 30 psi. How is that possible? Your tester is calibrated for 30 psi? Thank you for your input.

[@alexbowie6316]

Yes but how do you get an adapter to fit the small Yanmar engines. No glow plug and a clamp on injector into a tiny hole

[@LockyourHubs4WDing]

Sorry, not familiar with Yanmar engines, though if the injector orifice is the only access to the cylinder, you'll have no choice but to use that.

[@stevencohen4580]

I found a cheap stethoscope is pretty handy for leak down testing as well.

[@LockyourHubs4WDing]

Great idea!

[@jrodri14ii]

Can you provide any info on the adapter pipe?

[@LockyourHubs4WDing]

It was made up by the local hydraulic hose place, Enzed.

[@stuartarneaud218]

Thank you for your help

[@LockyourHubs4WDing]

Happy to help!

[@jeromevandenberg8062]

Good video, my 1hdt has good compression and passed the leak down test yet the oil consumption is excessive. It's coming out of the breather of the crankcase. Some people suggested that the oil ring is not wiping the oil off the bore. Any thoughts?? Cheers mate

[@LockyourHubs4WDing]

Are you running a catch can?

[@jeromevandenberg8062]

@@LockyourHubs4WDing I used to. It kept filling up with excessive oil and going into my intercooler

[@jeromevandenberg8062]

@LockyourHubs4WDing just venting to atmosphere now...oops

[@Verziq]

Are you doing a vid of pulling the head off?

[@LockyourHubs4WDing]

Due to the owner moving to the country for work, unfortunatley the car was sent to a mechanics. There was a small hole in #2 piston.

[@Wayne-Kerr_Rudy-Zarzoff]

Did u get the head off? Cant find a follow-up video

[@LockyourHubs4WDing]

The owner sent it to his mechanic, there was unfortunately a hole in the piston.

[@itroy3039]

I'd like to see a review on mattys bonnet strut 😂

[@LockyourHubs4WDing]

That's actually holding up the top mount intercooler! It's a Sahara, so comes with bonnet struts and a centre consule fridge. (Matt keeps reminding me.....)

[@keithowen3847]

Great at explaining it. I have a Kubota tractor. Before and after installing a brand new head, valves, injectors, my compression on all cylinders is zero except one which is 80. Pistons are good with no signs of damage. It ran great till I parked it for 2 weeks and now won't start or fire a lick. glow plugs get hot. No way I see to do a leak down test. Any thoughts.?

[@LockyourHubs4WDing]

You need to do a leak down to find where the compression is disappearing to. Can you pressurize the cylinder though the injector hole in the head?

[@berkesd]

I know it is an old video but where did you get the adapter hose?

[@LockyourHubs4WDing]

I had the local hose guys (Enzed) knock it up

[@bountyhunter1890]

Very good thanks

[@LockyourHubs4WDing]

Glad you enjoyed it!

[@digitalbilly]

Great video. I would like to know what tools your using. Please post Amazon links :)

[@LockyourHubs4WDing]

Thanks, I must set up an Amazon Affiliates Account.

[@atomichurley]

nice one mate. would you buy a better quality guage next time? what'd this one set you back?

[@LockyourHubs4WDing]

I think it was about $50. In retrospect, the cheap man buys twice....

[@JackLockyer-bt3sz]

Great!

[@LockyourHubs4WDing]

Glad you enjoyed it!

[@titantechph9711]

you selling those leak and compression test kit?

[@LockyourHubs4WDing]

They're from ebay.

[@bushratbeachbum]

Do you always test cold or is there a benefit doing a hot test?

[@LockyourHubs4WDing]

It might show a little less leakage hot, though I've always done it cold.

[@MrTDGU]

So will there be a rebuild series now??

[@LockyourHubs4WDing]

There well have to be!

[@XoTiiCau]

Hey mate, where did you get the glow plug adapter to suit the 1hdt? Cheers

[@LockyourHubs4WDing]

It was cobbled up from peices from the diesel compression testing kit to make it work with the leak down tester.

[@reinhardtrippmacher8776]

I bought LDT in the states but the compression tester in Asia. The couplings didn't fit. So I took one of the adapters in the LDT kit, drilled out the back to M10x1.25mm. Took a M10x1.25mm bolt, drilled all the way a hole through of 3mm. Shaped the front exactly like the compression tester plug and screwed the other side into the coupling I prepared. Braze welded it a tiny bit around and screwed it into the glow plug hole. Toyota is all metrical. Easy to do some DIY... cost me nothing...

[@muzzaball]

Hey Simon, great video, thank you. Would I be correct that there will be an 80 Series rebuild video coming next? I guess you guys will be doing the majority of the work. I look forward to that. Cheers mate - and sorry Matty! I guess the actual cost of parts wont be so bad, even tho Mr Tojo loves to charge, but any machining will obv cost - it may not be so bad?

[@LockyourHubs4WDing]

We're both quietly hoping it's just the gasket and not #2piston!

[@muzzaball]

@@LockyourHubs4WDing I must have missed the point of your video Simon, I thought gasket was ruled out and piston was the result of your testing? Happy for a gasket mate.

[@LockyourHubs4WDing]

@@muzzaball we'll find out soon!

[@deant6627]

Does the 1HD-FTE have glow plugs?

[@deriusnorris4463]

No. It has a mesh. Was wondering how a test would be done on a FTE.

[@josephmbuyisa4107]

Super👌

[@LockyourHubs4WDing]

Thank you! Cheers!

[@tristanstephens9076]

Was it a cracked piston? Turbod 1hz notorious for it!

[@LockyourHubs4WDing]

Cracked bore unfortunately.

[@tristanstephens9076]

@@LockyourHubs4WDing cracked bore!! Bugga. Thats an interesting one. Know what caused it?

[@LockyourHubs4WDing]

Unfortunately not. Though the replacement engine is running strong thankfully!

[@shamrock4life04]

Hopefully not a holed piston!

[@LockyourHubs4WDing]

Hope so!

[@nickayivor8432]

👍

[@shamrock4life04]

How was the blowby on this engine?

[@LockyourHubs4WDing]

Only 20K km since a rebuild, so not bad at all.

[@shamrock4life04]

That makes me think the issue might not be holed piston. If piston was holed the blowby would have been bad

[@jakeclonan6263]

No dislikes ❤️

[@LockyourHubs4WDing]

Cheers!

[@davidwarren4569]

KZbin have decided not to show dislikes anymore

[@LockyourHubs4WDing]

@@davidwarren4569 it's a shame, I can still see them as the uploader, but the viewers can't :(

[@LockyourHubs4WDing]

@@davidwarren4569 155 likes 0 dislikes!

[@aaronhogan2371]

Big love to the broken man with a broken wallet.

[@LockyourHubs4WDing]

Haha

[@bushratbeachbum]

710 hahahaha!!!

[@LockyourHubs4WDing]

Glad you enjoyed it! :)

[@bushratbeachbum]

@@LockyourHubs4WDing any idea why when supplying 100psi the first gauge reads 20 or 30? I have a very similar kit to yours. Do decent ones show the actual pressure or is it what it tests at? Got a low down power loss on a 4jb1t izuzu motor in a rodeo. Also runs very cool. Any ideas?! Cheers! Excellent videos. Nice one!

[@LockyourHubs4WDing]

As long as your compressor's air reg is set for 100psi and you use the reg on the leak down to calibrate the percentage loss gauge to 0, you're good to go!

[@rubiconned]

Never a good outcome...

[@LockyourHubs4WDing]

We're not looking forward to the next stage!