Compression Stroke & Top Dead Center

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Fast Fix

Fast Fix

Күн бұрын

Locate the compression stroke and TDC easily! I show you how to find the compression stroke with the valve covers on and with the valve covers off. I explain how to find TDC using preexisting marks on the harmonic balancer and how to find TDC if there are no marks on the balancer.
*If you have no marks on the balancer, you will need timing tape and a piston stop that fits your heads.
How to find diameter of the harmonic balancer using circumference: Sometimes it's hard to get an accurate diameter measurement and easier to measure the circumference. If you're able to measure diameter easily, great! If not, circumference is the way to go. You'll need some fabric measuring tape and some basic math skills! Here's an example:
Circumference of balancer is: 21"
We need to find Diameter in order to figure out what timing tape to use.
Circumference = 2 x 3.14(pie) x radius, so let's plug in our number
21 = 2 x 3.14 x radius
21/3.14 = 2 x radius -Divide 21 by 3.14
6.7 = 2 x radius -Our result from the equation above
6.7 / 2 = radius -Divide 6.7 by 2 to get the radius
3.35 = radius -Our result from the equation above
Diameter = 2r, so our radius is 3.35 x 2
D= 6.67 - Our answer from the equation above
As you probably noticed, you can stop once you divide circumference by pie, but I wanted to be thorough and show the entire equation.

Пікірлер: 185
@HeinerHartig
@HeinerHartig 20 күн бұрын
Thanks for a short , to the point , clear and straightforward practical instruction .
@FastFixYouTube
@FastFixYouTube 11 күн бұрын
You're very welcome! I appreciate you taking the time to drop a comment, thanks!
@markcastillo7078
@markcastillo7078 3 жыл бұрын
Hey thanks for taking the time for making this video for all of us DIY out here. Working on a 1934 Ford 3 window coupe that i got a hold of. This is gonna help me out a lot. Thanks again.
@FastFixYouTube
@FastFixYouTube 3 жыл бұрын
No problem! Man, the build sounds exciting. Those cars are sooo sweet 🤙
@fishawk90
@fishawk90 Жыл бұрын
man u save the day. working on a motor that has no timing marks #1 piston comes up twice with a full rotation of the crank & was at a loss figuring out which is compression which is exhaust.
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Yeah man no problem! Glad this helped!
@gerritpretorius3428
@gerritpretorius3428 3 жыл бұрын
This is the best fully explained video i I've ever seen , exactly what i wanted to know all in one, thanks
@FastFixYouTube
@FastFixYouTube 3 жыл бұрын
Awesome to hear that! Thanks 👍
@romans6233
@romans6233 4 жыл бұрын
Thanks a whole lot, great video also. I was very unsure about the compression stroke on my #1 piston, I'm replacing my distributor... but you explained very well. Thank You much !
@FastFixYouTube
@FastFixYouTube 4 жыл бұрын
You are welcome! Glad this helped you. I appreciate the comment 👍
@johanwilkes8078
@johanwilkes8078 2 жыл бұрын
U
@hankschrader149
@hankschrader149 2 жыл бұрын
Awesome video! I like the editing you did with the pop up graphics. I'm working on my Mercruiser 470, 4 cylinder which is basically 1/2 of a 460 Ford, has the same head, pistons etc. I'll use my bent pushrod from my number 3 cylinder instead of a screwdriver 😬. Btw subscribed 😉
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Glad you liked! Thanks for the comment and sub. Best of luck on the merc! 👍
@jesustamayo6885
@jesustamayo6885 3 жыл бұрын
Thank you that’s what i was looking for to do on my Chevrolet pickup very nice of you bro teaching me how to fix my problem
@FastFixYouTube
@FastFixYouTube 3 жыл бұрын
No problem my friend! Glad this helped you 👍
@Pab-B
@Pab-B 3 жыл бұрын
Absolutely brilliant. Thank you for the shop towel plug trick!
@FastFixYouTube
@FastFixYouTube 3 жыл бұрын
You are welcome! Thank you for the comment 👍
@muhammadhabib6231
@muhammadhabib6231 Жыл бұрын
​@@FastFixKZbin crazy ukj❤ Nikki lmk full Ll By the htooooollh😊yuubb😊
@seanpollard6914
@seanpollard6914 2 жыл бұрын
Awesome video best I've seen very well explained. I am rebuilding a morris minor engine will help massively when setting up the timming many thanks 👍
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
You are very welcome! I appreciate the comment and best of luck with the engine 👍
@Angel-xe2de
@Angel-xe2de 3 жыл бұрын
I use the good ol pipe cleaner in the spark plug hole and I just spin until the pipe is at its highest. Meaning the piston is at its highest
@FastFixYouTube
@FastFixYouTube 3 жыл бұрын
Yup. That’ll work too!
@charlessmith7780
@charlessmith7780 2 жыл бұрын
Thanks for your awesome instructions 😀
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
You’re welcome!
@williechambers7578
@williechambers7578 2 жыл бұрын
Thanks for making this video I'm pretty sure you've helped put alot of minds at ease. I have a question: I'm changing a water pump on a 2014 Ford Flex and the primary timing chain was removed without the Cams locked. Cams where manually turned for alignment. I'm assuming this video explains my solution? If so is it best to go ahead and remove cylinder head for setting (TDC) while making sure crankshaft is on the compression stroke?
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Hello. I’ve never worked on a Flex or an overhead cam engine (believe it or not) but I assume there are timing marks that must be aligned prior to firing the engine. It sounds like you did that part, so now you just need to set the engine to its proper starting configuration, right? But isn’t a flex computer controlled? Therefore, as long as the cams are correct, the computer handles the rest, right? lol, I’m asking more questions than answering, but I think I’m correct. Please let me know if not.
@andyrob73
@andyrob73 3 ай бұрын
Excellent! I'm going to try the bung in the spark plug hole trick later, that's physics in motion 👍😀
@FastFixYouTube
@FastFixYouTube 3 ай бұрын
😂😂😂 indeed it is! Thanks for commenting 👍
@tyclute1454
@tyclute1454 2 жыл бұрын
Great Video. Thanks for the info!
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
You bet!
@alvaropimentel779
@alvaropimentel779 2 жыл бұрын
Awesome explanation I’m going to save lots of $ doing my self. Your the man!!
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Hello. Glad this helped! Best of luck and thanks for the comment 👍
@chrisknobbe7914
@chrisknobbe7914 3 жыл бұрын
Great video
@FastFixYouTube
@FastFixYouTube 3 жыл бұрын
Thank you 👍
@jesustamayo6885
@jesustamayo6885 3 жыл бұрын
Thank you again
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Of course!
@jesusrocha9000
@jesusrocha9000 3 жыл бұрын
Great video man
@FastFixYouTube
@FastFixYouTube 3 жыл бұрын
Thank you. I appreciate the comment.
@jciabatoni
@jciabatoni 2 жыл бұрын
Awesome video saved for reference.
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Thanks!
@thenglishannel
@thenglishannel 2 жыл бұрын
you just saved me some headache, thanks man
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
You’re welcome!
@charlessmith7780
@charlessmith7780 2 жыл бұрын
Right on definitely number one however ford I believe had rare one at I'm going to say one year that the timing was different i don't remember when or what it was, just FYI
@mikeb5981
@mikeb5981 2 жыл бұрын
You look like Edward Norton 😂
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
He’s a pretty kickass person, so I’ll take that!
@tracymartin705
@tracymartin705 Жыл бұрын
thanks for that info. verry helpful i was screwed for a second
@FastFixYouTube
@FastFixYouTube Жыл бұрын
You bet!
@mattgeiger2627
@mattgeiger2627 3 жыл бұрын
Awsome well done thank you vary much.
@FastFixYouTube
@FastFixYouTube 3 жыл бұрын
You’re welcome!
@mikeb5981
@mikeb5981 3 жыл бұрын
So I have a question, if you have your cylinder heads off and you have piston 1 at top dead center and ready to put the new cylinder heads on and torqued them down to specs do you still need to rotate the engine to get it on compression stroke?
@FastFixYouTube
@FastFixYouTube 3 жыл бұрын
Hello. The answer is yes. Even if the #1 piston is at TDC (heads off) you won’t know if it’s at TDC on the compression or exhaust stroke therefore you’ll need to verify when you put the heads back on.
@mikeb5981
@mikeb5981 3 жыл бұрын
@@FastFixKZbin thank you, I thought so was just double checking. God bless
@rabaham
@rabaham 2 ай бұрын
Thank you great demo.
@FastFixYouTube
@FastFixYouTube 2 ай бұрын
You bet! Thanks for leaving a comment, I appreciate it!
@shawnlibby675
@shawnlibby675 2 жыл бұрын
Good at what u do brother
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Much appreciated. Thank you!
@Bob-Pye
@Bob-Pye 2 жыл бұрын
So you find zero after both valves are on compression stroke? I am having a hard time tightening rockers there gt 40 3 bar stock rockers, stock cam i beleive. Thanks any guidance much appreciated..
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Hello. As long as both valves are closed be it on the compression stroke or exhaust stroke, you can set lash. Just need to make sure both valves are shut completely so you can set lash properly at zero. Do you have roller rockers or stamped?
@shadowoutlaw9834
@shadowoutlaw9834 2 жыл бұрын
@@FastFixKZbin roller rockers or stamped. stamped at to flat lifters. and flat cam or the roller engine.
@michaelsparks51
@michaelsparks51 2 ай бұрын
Great video.
@FastFixYouTube
@FastFixYouTube 2 ай бұрын
Thanks! Your comment is appreciated 👍👍👍
@Jus3000
@Jus3000 6 ай бұрын
What if neither valve is moving up and down as I rotate the crank hub??
@FastFixYouTube
@FastFixYouTube 6 ай бұрын
That could mean a few things, but more than likely, the wrong lifters or stuck lifters, IMO. Does this happen on all cylinders?
@leedan9887
@leedan9887 Жыл бұрын
Good job man
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Thanks! Appreciate the comment 👍
@OhhEssence
@OhhEssence Жыл бұрын
I have cranked and cranked and I can’t get it to blow a piece of paper towel or my finger. I haven’t taken the valve cover off yet but I hear air just no pop. Any thoughts man?
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Hello. Yes, I’ve got a few thoughts. If there isn’t pressurized air coming from the spark plug hole, your valves are likely not sealing. Check the lash and make sure everything is within tolerance. In the worst case scenario, your rings are waaaay bad and allowing blowby. Could also be a head gasket, etc…. But it really sounds like an open valve issue. Let me know how it goes. Thanks for the question!
@linshebola5465
@linshebola5465 Жыл бұрын
Yo bra-tha I like ur video on the TDC cause I've done like everything on my 2005 Nissan Altima like the head gasket exhaust manifold gasket n the intake n bought a new exhaust manifold converter new spark plugs ignition coils oxygen sensors new battery changed the oil changed the anti-freeze n b4 that I changed the fuel pump that's the 1st 1 that kocnked out bt it's not starting r running n my bro said my timing chain n another 1 said the same so ur video is all cool bra-tha n I'm not a mechanic bt do know some stuff bt never have I done what I did bt I did it by whatching a video on how to change the head gasket on a 2005 Nissan Altima 2.5L engine 4 cylinder bt it didn't show how he did the TDC cause it was snap shots here n there bt I texted him n he said that the colored links have to b aligned with the notches he said so I'm gonna do that bra-tha hope u text back n let me know if that's what it is bra-tha
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Hey, what’s going on man! Sorry about the late reply. I don’t have much experience on altimas or over head cam stuff, but that advise sounds correct. Got to line up the marks in order to have a chance at it starting. You can double check your work using the method in my video. Did you have any luck? Sounds like a big job. Not being a mechanic and getting all that done certifies you for sure.
@linshebola5465
@linshebola5465 Жыл бұрын
@@FastFixKZbin 4 reals bra-tha, COOL 4 UR RESPONSE BRA-THA bt have another thing that's giving me a problem bra-tha I don't know why my #1n #3 ignition coils r hard to get out #2n#4 came out all good like they should bt that's my problem right now, u got me good advice bra-tha
@Mike-qo4kp
@Mike-qo4kp 2 ай бұрын
Super helpful
@FastFixYouTube
@FastFixYouTube Ай бұрын
Glad this helped! 👍👍👍
@vadneysean72
@vadneysean72 Жыл бұрын
Great video. Working on a stock 92' 302 HO. I'm not the 1st owner. Newly rebuilt E7 stock heads I just put on, went to tighten pedestal rockers and found no.1 ok, timing mark at 0. On to no.3 and on compression stoke TDC was no where near the 0 mark on balancer. Piston was way down. What should this tell me?
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Hello. Sorry for the late reply. It sounds like the piston was at BDC when it should’ve been on TDC? Is that what you were seeing?
@vadneysean72
@vadneysean72 Жыл бұрын
@FastFixKZbin yeah. I'm taking it to a speed shop. I'm thinking timing chain might have been changed by previous owner. When valve covers came off one side looked clean, other baked in black carbon.
@sean6049
@sean6049 Жыл бұрын
I need some help. So ive taken my top end apart a few times, no issues. But this time i just cant get the car started. Ive tried setting the timing like 4 times now. Doesnt even try to start. Motor is fresh built. I took top end apart to fix a slight coolant leak. Put everything back together and no start! Any suggestions would be appreciated.. 🙏 Everything is connected. Spark plug wires on correct.
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Hello. It’s pretty hard for me to say to be honest. So many variables and impossible to know the full situation you’ve got. Have you verified that you’ve got fuel? Spark? Then of course timing. It’s got to be one of those three things. Check for blown fuses as well. Probably a stupid question, but is the coil plugged in and working? Just go through your process step by step and verify the basics. You’ll figure it out 👍
@maximpopov9891
@maximpopov9891 4 жыл бұрын
I am trying to find compression stroke on Toyota's V8 engine. I took the belt off and moved crankshaft and camshafts. I have all the marks, I understand that there are two TDCs. And from your video I have learned how to find compression stroke. Now, when I am looking for the compression stroke on my engine, should I keep the belt off? I am trying to "reset" timing because I messed it up by moving the crankshaft and camshafts randomly with out the belt on.
@FastFixYouTube
@FastFixYouTube 4 жыл бұрын
Hello. It depends on which belt you’re talking about. The serpentine belt that drives your engines accessories or your timing belt which drives the camshafts?
@maximpopov9891
@maximpopov9891 4 жыл бұрын
Fast Fix I mean timing belt. But I guess without a belt there is no difference since the valves would not move... I have tried turning my engine (belt on) but the paper towel never popped. I did at least four full rotations.
@maximpopov9891
@maximpopov9891 4 жыл бұрын
Fast Fix the engine has a variable timing, I don’t think I have damaged anything when I was rotating stuff without the belt because I stopped when there was resistance. I also turned crank 50 degrees BTDC before moving cam shafts. So I am thinking that since it is a VVT engine, the valves will adjust automatically once I put it back together and start it. Is it possible?
@FastFixYouTube
@FastFixYouTube 4 жыл бұрын
Hello. I’m sorry, I don’t have any knowledge about VVT engines. I would say that the crank and cams need to be aligned at the correct degree for the engine to fire. That doesn’t change because you have VVT. I believe most VVT engines use a cam phaser to vary cam timing driven by hydraulics or an electronic actuator, but that doesn’t have anything to do with getting the crank and cams in the right position to fire the engine. You’ll still need to find TDC in relation to your #1 piston in my opinion. I don’t have knowledge on Toyota V8s either. I assume your engine doesn’t have a distributor, but rather a Reluctor wheel. To be honest, search for a more appropriate video for your application. My video was geared for domestic V8s. Hope it all work out and I’m sorry I couldn’t have been of more help.
@maximpopov9891
@maximpopov9891 4 жыл бұрын
Fast Fix thank you!
@Scarlett5PointWoah
@Scarlett5PointWoah Жыл бұрын
Thank you, so much!!! I finally get it!! :)
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Glad I could help!
@Scarlett5PointWoah
@Scarlett5PointWoah Жыл бұрын
@@FastFixKZbin Do you have any videos on deciding/upgrading fuel injectors? I’m trying to immerse myself in the data before I jump in. Any recommendations?
@juanguzman1411
@juanguzman1411 2 жыл бұрын
i have a question i have a 20O4 kia optima 2.4 litters what happend when you have the camshafts in the guided marks and you move crankshaft clockwise a whole turn or even Two whole turns ?🤔
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Hello. I assume for you situation the timing chain has been removed and the crank is turning independently of the camshafts. When this happens, your timing will be way off. You’ll need to find the proper start up procedure for your vehicle. Generally, this means finding TDC on the compression stroke on the #1 piston, but I can’t speak specifically for your car as I’m unfamiliar with it.
@juanguzman1411
@juanguzman1411 2 жыл бұрын
@@FastFixKZbin everything came out perfect, I just lined marks once more thanks for your support !
@michaelrj9
@michaelrj9 2 жыл бұрын
Wouldn't you have a chance of the paper towel getting sucked in on the intake stroke?
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Hello. Yes. Make sure the paper towel is large enough to fill the spark plug thread bore and you’ll be fine. If too small, yes could get sucked in, but still unlikely because the intake valve will be opening and the cylinder will draw air in from that location relieving suction on the spark plug. I’m sure this has happened to someone however who used too small of a paper towel. Thanks for the question 👍
@robbiealdridge3536
@robbiealdridge3536 Жыл бұрын
Thank you I just seen how to fix my problem
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Awesome! Glad this helped 👍
@mariano4003
@mariano4003 11 ай бұрын
best video, regards!
@FastFixYouTube
@FastFixYouTube 11 ай бұрын
Thank you very much!
@raymondlepp9048
@raymondlepp9048 2 жыл бұрын
Thank you
@FastFixYouTube
@FastFixYouTube Жыл бұрын
You bet!
@rodolfogana2508
@rodolfogana2508 2 жыл бұрын
Hi will the paper towel pop the same way if i was to be on the exhaust stroke meaning the piston going back up to tdc but on exhaust?
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Hello. Generally, no it will not. The towel shouldn’t be popping out if on the exhaust stroke because the exhaust valve will open and relieve the pressure. However, this may not always be true depending on the camshaft. That’s why I say to go slow when rotating the engine. You’re more likely to pop the towel out on the exhaust stroke if you spin the engine too fast because the valve won’t have the chance to open and relieve the pressure before the towel pops out. Hope that helps.
@rodolfogana2508
@rodolfogana2508 2 жыл бұрын
@@FastFixKZbin thank youu so much that makes sense.
@rodolfogana2508
@rodolfogana2508 2 жыл бұрын
@@FastFixKZbin I was able to get the truck running but I found my self with another issue, its a stock 454 im using vacuum advance to ported on my carburetor but i also have an egr with no solenoid or anything just the egr and a vaccum hose, should i t off the ported port ? i have no more ported ports in my carburetor
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
@@rodolfogana2508 Hello. Glad you got it running! I'm sorry, I have no technical knowledge around carburetors...before my time :(
@rodolfogana2508
@rodolfogana2508 2 жыл бұрын
@@FastFixKZbin thank you and yess i missed the sound, your video helped alot thanks
@bleckybob
@bleckybob Жыл бұрын
Question. I’m rebuilding a single cylinder atv. The timing is off. The cam chain was removed and the piston was turned before putting back together. How do I find compression stroke if the cams are not hooked up to the cam?
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Hello. Do you mean if the cam isn’t chained to the crankshaft?
@bleckybob
@bleckybob Жыл бұрын
@@FastFixKZbin I believe so. There’s a cam sprocket connected to a chain. I’ve set it to TDC mark. And it’s acting like timing is off. Spark is fine, but it’s backfiring through the carb. I replaced seals, gaskets, the whole top end, piston and rings are brand new. Carb was jetted to factory specs, I’m just at a loss
@FastFixYouTube
@FastFixYouTube Жыл бұрын
It sounds like it’s 180 degrees off. As in the spark is firing when the engine is TDC on the exhaust stroke. I’d pull all the plugs, rotate the engine 180 degrees and try again. You should be able to find the compression stroke using the shop towel method. Make sure that towel fires out of the spark plug hole with force. That will indicate the compression stroke. Let me know how it goes
@bleckybob
@bleckybob Жыл бұрын
@@FastFixKZbin so I tried that. Towel flew out the spark hole and then I kept rotating to the T mark on the flywheel and it still backfiring through the carb and not firing. I then rotated it 180 degrees and set it to the T again. And still same thing. Could it be valves? Or maybe a carb thing?
@domingogarcia4353
@domingogarcia4353 2 жыл бұрын
hello friend can you help me I have a special 78 Ford f350 camper I have problems with the distributor
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Perhaps. What seems to be the problem?
@1badombre82
@1badombre82 Жыл бұрын
Oh God the rag sucked into my cylinder! JK. I actually used this video to confirm my TDC a few years ago
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Lol, I said out loud “oh shit!” Glad it was a joke 🤣🤣🤞
@1badombre82
@1badombre82 Жыл бұрын
@@FastFixKZbin that was a fear i had lol but its a great tech. Unfortunately I was a sloppy drunk then and I don't trust the work I did so here I am to check it again. The truck and I are both non ethanol this time 😂
@garreksloan346
@garreksloan346 5 ай бұрын
thank u sir
@FastFixYouTube
@FastFixYouTube 5 ай бұрын
You’re welcome! Appreciate your comment 👍👍👍
@dannybartlett4225
@dannybartlett4225 2 жыл бұрын
Is the piston stop mean when you use a crank pin 📌
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Hello. Not understanding this, sorry. 🤷‍♂️
@vdavis1959
@vdavis1959 4 ай бұрын
I use a wine cork. Works real well.
@FastFixYouTube
@FastFixYouTube 4 ай бұрын
Good idea! 👍
@jeffloh8767
@jeffloh8767 4 жыл бұрын
Good vodeo
@FastFixYouTube
@FastFixYouTube 4 жыл бұрын
Thank you sir!
@jasonfoust2010
@jasonfoust2010 2 жыл бұрын
I guess I'm an idiot haha. I just rebuilt my Amc360 and I've tried the paper towel method to find TDC compression. No matter how big or small the paper towel piece it will never pop out. Again...maybe I'm an idiot
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Hey there. No, certainly not an idiot if you were capable of rebuilding the motor. Did you put some crazy cam in with major overlap? Still, there should be a moment when compression blows the paper towel out. OR, you perhaps have valves that are not seating? Sorry I can’t be of more help!
@shadowoutlaw9834
@shadowoutlaw9834 2 жыл бұрын
use a rubber plug or a wooden round dowel slightly smaller the the park plug hole wrap plastic arount it stick snugged into the spark plug hole. and turn engine over will popp out and sound like a shot gun going off. or can place thumb over the spark plug hole and turn engine over the air pressure will blow you thunb or finger out of the hole.
@sharkerio
@sharkerio 2 жыл бұрын
Is the compression stroke and tdc supposed to be in the same spot? I get confused when you find the compression stroke, but then adjust to zero... doesn’t that take it of the compression stroke?
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Hello. So the quick answer is no, it doesn’t. It’s important to find the compression stroke first because there are two TDC moments in the 4-stroke cycle. If you don’t find the compression stroke first, you’ve got a 50% chance that you’ll be finding TDC on the exhaust stroke which will give you all sorts of trouble when trying to start the car. You must be on the compression stroke for the timing to be set correctly. Hope that helps! Thanks for the question 👍
@shadowoutlaw9834
@shadowoutlaw9834 2 жыл бұрын
no, as to the old marking it used to be 10 degress before top dead center so it will allow a good amount of gas say 1/4 cup just saying sample of gas and air is created by piston once it comes up on the compression stroke sparks ignites on the top of the cyclinder once it reaches towards the top once fuel ignites air compression creates more and bang from fuel fire forcing the piston back down. and that is how engine pistons and air and fuel works together.
@cartroublewannafix8611
@cartroublewannafix8611 2 жыл бұрын
s there a way to adjust the timing without marks? I took the chain out and my stupidity allowed me to turn the the sprocket s individually, which turned the cams. Now I have no idea where I am at. Call me an idiot because I am. 2015 Chev malibu 2.5
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Hello. Haha, we’ve all been there. I did the same thing on this car which prompted me to make this video. Regarding your vehicle, I believe the cam sprockets have marks on them (small arrows or circular stamp marks) that align with marks on another sprocket. I’m not 100% sure on your 2.5 however. I’m sure there’s a video out there for your situation. This video is more for single cam engines. Best of luck
@cartroublewannafix8611
@cartroublewannafix8611 2 жыл бұрын
@@FastFixKZbin kzbin.info/www/bejne/fXPGc6V3qqhqqqs . This is a small video of my cams. Do you think i'm 180 degrees off on the timing ? Thanks for the help.
@hankschrader149
@hankschrader149 2 жыл бұрын
Nah man we've all been there! Thank God for you tube and digital technology! Chiltons manuals and word of mouth was the only way we could do it back in "the day" lol
@johngranato2673
@johngranato2673 2 жыл бұрын
Best way is to pull valve cover and look at number 1 valves--believe me
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Having an eye on the rockers do help 👍
@Shogoat1304
@Shogoat1304 2 жыл бұрын
Man mines being a pain, checked tdc compression with the thumb technique and the balancer is like 45 degrees off stabbed the dizzy and it definitely won’t run might put here and there, I cannot for the life of me get it to run to the point I think the cam jumped time
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Hmm…. Do you have factory timing marks or timing tape on the balancer? Some quick things to check are your plug wires. Make sure they’re routed properly to the correct cylinders. You’d be surprised how often that’s the problem. Also, are the points and distributor cap and rotor look okay? If corroded, replace those. Let me know if any of this helped. Best of luck 👍
@Shogoat1304
@Shogoat1304 2 жыл бұрын
@@FastFixKZbin yup factory timing marks are there, but they’re no where close when piston is at tdc compression balancer definitely spun, and when getting it to tdc compression manually the car will only putt but not run, good fuel pressure, I’m seeing injector pulse I’m just lost, probably gonnna check timing next. unfortunately, I hope it is timing due to the fact of if it’s not I have no other idea why it wouldn’t run. Thanks!
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Hey there. Hmm, yeah I’d say timing is likely the cause. If you’re getting fuel and spark, timing is about all that’s left. However, if you had a failure like the balancer key breaking and causing it to spin, you’d need to replace that or it won’t run properly. Hope it’s not that…could be a big problem if so. Again, make sure you’re on the compression stroke. I know you did the thumb method, but make sure you’re not feeling pressure on the exhaust stroke and going from there. Use the shop towel and make 100% certain you’re on the compression stroke. Best of luck and feel free to update.
@shadowoutlaw9834
@shadowoutlaw9834 2 жыл бұрын
@@Shogoat1304 vehichles that are equiped with computer technology then you only have to set it to top dead center on the compression stroke. 0 set, computer sets the rest when it starts up. thats with engines with no manual distributors that are equiped with cam and crank sensors. 2 different worlds when setting timing. also make sure your cam gear and crank gear on ford both dots facing uppwards at the 12 O'clock position on Ford's chevy's bottom crank gear facing up at 12 O'clock postion and the cam gear set dot at 6 O'clock postion must be exactly on line up to one another.and there you have it. .just make sure your cam is not set off 180 degrees out. other wise you will be tearing your timing gear back off and resetting the cam.
@Bossy23
@Bossy23 Жыл бұрын
isn't supposedly when the piston of cylinder 1 reaches the top is TDC? I'm still confused...
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Yes, TDC means top dead center. And in the case of Fords, piston #1.
@danielmiller3967
@danielmiller3967 Жыл бұрын
So is that when the distributor should be pointing directly at #1 also?
@pomsleaz5530
@pomsleaz5530 11 ай бұрын
When u are spinning the engine are all of your spark plugs out the engine
@FastFixYouTube
@FastFixYouTube 11 ай бұрын
Yes, spark plugs are out. Very hard to turn otherwise.
@donblue3725
@donblue3725 Жыл бұрын
no false postive on compression stroke help a lot...
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Indeed it does!
@danpmatz
@danpmatz 3 жыл бұрын
Can't you jump timing by spinning backwards
@FastFixYouTube
@FastFixYouTube 3 жыл бұрын
Not sure what you mean by “jump timing”
@stevo3644
@stevo3644 3 жыл бұрын
If the tensioner is purely hydraulic then yes this is a possibility but more commonly turning engine anti clock wise on some engines with timing chain tensioners creates slack at the tensioner and the tensioner automatically moves out to compensate and when the engine returns to normal clock wise direction the tensioner is way too tight and the weakest link in the timing chains / gears configuration will break or get destroyed.
@shadowoutlaw9834
@shadowoutlaw9834 2 жыл бұрын
yes and no. some inboard boat engines run backwards alot of peeps not know that. but anyways most time the engine is running clockwise just the distrubtor turns counter clockwise as to the shape gear on cam for the distrubtor gear. ford makes them in the front if in the back of engine like chevy did all will be working in the clocwise rotation of the engine. just a simple way of saying how ford and chevy made there differences. also alot peeps not know this either chevy made the 302 first not ford. chevy 1966 chevy Z28 /302 . also the chevy ss camero in some of them.later on chevy made a 301 big v6 engine for the 1980s chevy station wagon .
@eduardohuerta7559
@eduardohuerta7559 3 жыл бұрын
Arent you on the #2 cylinder
@FastFixYouTube
@FastFixYouTube 3 жыл бұрын
Hello. Nope. #1 on this 302 Ford is Passenger side front.
@frankdavidson9675
@frankdavidson9675 2 жыл бұрын
why would factory put tdc in wrong place itsmarked on balencer
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
They wouldn’t.
@mmmvtec90
@mmmvtec90 2 жыл бұрын
My imagination is too good.. pretending the valve cover was on didn’t allow me to see the valves moving.. can you do another video with the valve cover completely off?
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
😂😂😂
@mmmvtec90
@mmmvtec90 2 жыл бұрын
@@FastFixKZbin great video dude! Lol I didn’t think about the paper towel trick. Good to know. 😁👍🤜🤛💪
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
You’re welcome and great comments! 😂🤣😂
@rodolfogana2508
@rodolfogana2508 2 жыл бұрын
is the pressure of the exhaust gasses coming out after being burned the same as the pressure for combustion?? im trying to feel for pressure with my finger but i keep feeling air blowing out twice
@Donny.C.wlWilliams
@Donny.C.wlWilliams Жыл бұрын
Good video verified my timing but still have a miss
@FastFixYouTube
@FastFixYouTube Жыл бұрын
Glad it was helpful to some degree. See what I did there? 👍
@63grandsport11
@63grandsport11 Жыл бұрын
🏆
@FastFixYouTube
@FastFixYouTube Жыл бұрын
👍👍👍
@bluefallon6374
@bluefallon6374 2 жыл бұрын
To bad that won’t work on a 3 cylinder diesel.
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Haha, nope. It will not.
@bluefallon6374
@bluefallon6374 2 жыл бұрын
@@FastFixKZbin will you do a video on finding TDC on a 3 cylinder diesel.
@ecurbyhprum1043
@ecurbyhprum1043 10 ай бұрын
Instead of a sticking your screwdriver in my spark plug hole I use a chopstick
@FastFixYouTube
@FastFixYouTube 10 ай бұрын
Love it!
@frankdavidson9675
@frankdavidson9675 2 жыл бұрын
you are not watching balencer while turning i saw the mark clear as day
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
I was
@frankdavidson9675
@frankdavidson9675 2 жыл бұрын
you just passed tdc you do have a mark ou
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Umm..
@jamesmcleod7161
@jamesmcleod7161 5 ай бұрын
Ó
@FastFixYouTube
@FastFixYouTube 5 ай бұрын
Umm… 🤔
@joe-hp4nk
@joe-hp4nk 4 ай бұрын
Your first mistake was having a ford.
@FastFixYouTube
@FastFixYouTube 4 ай бұрын
lol, I like the shit-talk! And how can that be true when ford distributors are at the front of the engine? Perhaps Chevy likes it from behind? 🤔 😂👍 thanks for the comment!
@mustangstuff7213
@mustangstuff7213 Ай бұрын
Wow. We have a fuckin' GENIUS here....
@joe-hp4nk
@joe-hp4nk Ай бұрын
@@FastFixKZbin Ford's have been trying but they can't get close enough.
@joe-hp4nk
@joe-hp4nk Ай бұрын
@@mustangstuff7213 Mustangs are like porcupines only the pricks are on the inside.
@andrewsmith941
@andrewsmith941 2 жыл бұрын
Great video
@FastFixYouTube
@FastFixYouTube 2 жыл бұрын
Thanks!
@chuckiegsdodgegarage7422
@chuckiegsdodgegarage7422 4 ай бұрын
Thank you
@FastFixYouTube
@FastFixYouTube 4 ай бұрын
You're welcome!
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