Critical Engine Build Step: How to use plastigage

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How to check engine clearances is not hard. Here I cover how to use Plastigage. Plastigage is a very important step in your engine rebuild process.
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4 июл 2024

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Комментарии : 59

@arjanwilhelm3545 5 лет назад

Tomorrow I can pick up my engine block from the machine shop. I hope you will stay one step ahead of me so I will make no mistakes in putting this engine back together. Keep them vids coming... Thanks!! Arjan from the Netherlands

@JeepSolid 5 лет назад

+Arjan Wilhelm Very cool. You can learn from my mistakes. Haha! 😂

@arjanwilhelm3545 5 лет назад

@@JeepSolid Hi Dale, It's Arjan again! Question, did you place the rear main seals to do this test? Thanks a lot. Greetings from Holland

@arjanwilhelm3545 5 лет назад

@@jbhk7977 Haha, hoi John! Ik woon in Lelystad. Je kunt mijn revisie volgen op het Nederlandse Jeep forum. Topic heet Arjan's Cherokee.

@JeepSolid 5 лет назад

Nope. Didn't place the rear main seal for the test.

@musclecarfanatic2404 4 года назад

Good job and it always pays to be thorough when you are spending your own hard earned money on any machine work / custom mods or builds, and or just re-building your own engine etc, a critical small step like this can save major catastrophe / failure down the road, and if the clearances are wrong / You could be starving the bearings of oil / harsh metal on metal, and your rebuild will be very short lived. Great job by the video host, and I enjoyed watching. Keep up the Great work!

@fenna_pel 3 года назад

thx for this clear explanation of plasigage :) (i'm rebuilding a 2.25D land rover engine from the mid 1980's)

@tomgt007sugden 2 года назад

You never ever put the crank in dry. You put a thin micron layer of oil on the bearing and on the cap bearing. Then place the plastigauge on the crank. This dose 3 things 1 protects the crank and bearing from any friction damage 2 gives you a more accurate reading with a total clearance and 3 makes it easier to clean the plastigauge compound off the crank.

@moabwheeling 5 лет назад

Good job Dale and great explanation on using Plastigage . You would be surprised on how many people don't use it , they just trust the machine shops work . I have seen many mistakes by machine shops with clearance problems .

@JeepSolid 5 лет назад

Yeah, it's a good thing to check. Pretty easy

@jarviscorley8860 3 года назад

thanks for showing me how to use a plastigage. didnt know how to use it but i know how now. thank you

@24MartinONDS 4 года назад

Great video. Im just about to plastigage my LT1.

@michaelrouse627 3 года назад

finally someone explains it so even I can understand!!!

@1957f100 4 года назад

I prefer my micrometers and dial bore gauge. I have seen too many people over the years get false readings on connecting rods, simply by the way they remove the rod cap.

@bunnyofdoom87 5 лет назад

Learn something new every time! Never heard of this, makes perfect sense. Definitely going to add to things to do for future engine rebuild! :D

@JeepSolid 5 лет назад

Cool! It's pretty easy and important to check.

@spang162 5 лет назад

This is awesome. I love your videos!

@JeepSolid 5 лет назад

Great! Thank you!

@skylinefever 4 года назад

Another thing to remember is that metric plastigage exists because you will need it in many more modern engines. There is plastigage made so that the numbers are not just conversions of inches, rather the numbers are nice even metric numbers. 1:50 in addition, it will spread around the plastigage, giving you an incorrect measurement. 4:35 or if the clearance is too wide, there will not be enough oil pressure.

@JeepSolid 4 года назад

Good tips. Thank you!

@k4x4map46 5 лет назад

red rags= lint fibers however, the content of this video was the main driver so thumbs up

@DaBestbruv 4 года назад

Thanks for this awesome video. I have a question regarding my 345 Hemi. Where can I find the proper clearance needed so I know what to measure?

@saifalyarabi2808 3 года назад

great video .great man

@oldschool240 Год назад

Hey Dale. Building my 98 TJ 4.0 right now. I've enjoyed all your videos. Totally helpful! I'm a little confused about the process of using plastigauge to check rod bearing clearances. Do you check the ring gaps, install the pistons & then do the plastigauge? how do you rotate the crank, without lube, to do the check??? Thanks! Steve

@jwilson6086 5 лет назад

Coming together well.

@JeepSolid 5 лет назад

Thanks!

@robophobic3716 2 года назад

What do you do if you are too tight or too loose? Have to get modified bearings?

@georgeadolf666 3 года назад

Hey, I was just curious and am hoping you can advise me, but I am looking to replace my main bearings and possibly rod bearings in my CJ5 258 (1979). Can I do that with the engine still in the Jeep? I just did an engine overhaul besides - ALL new gaskets top end and bottom end, including rear main and front main through timing cover, so I'm going to drop the oil pan again and replace the bearings - engine was slightly oil starved and I dont want any future issues. Any advice/suggestions would seriously be appreciated. Thanks!

@1970Jarochito 3 года назад

what if the plastigage are different in size ? how will i know if there is something wrong with the crank shaft ? My motor was rebuilt, and #4 bearing was tight, and would not move. what do i do then ?.

@kevinhancock4064 Год назад

Woupd this need doing if crank etc not been touched in a motircycke engine?

@congueromasloco 4 года назад

Hi Dale! I understand what you explaining bout clearance. I have a 2005 Chevy equinox with 3.4 engine, i did some research about the clearance i need but i really dont understand the numbers. Is a bit complicated for me. Can you help me and tell me what color platigauge i need please. Thank you a lot.

@mudpro200 3 года назад

I'm replying in case you still don't have a answer to your question. You can get a detailed book from part stores or on line for your car or truck that has the rebuild information in it. Just find the clearances it calls for and then buy a plastic gauge that matches what it is calling for.

@1970Jarochito 3 года назад

what if the gage size is different then one another ?

@VictorGarcia-zc7xi 4 года назад

Do you use old bearings on the caps to check the clearance ?or you got to pull bearings out an check clearance with no bearings?

@westsidedavie 3 года назад

You install new bearing.

@epicasphalt6298 2 года назад

Thanks for the video. How do you clean the plastigage off of the bearing?

@kevinhancock4064 Год назад

I may be wrong but didn't think you need to

@1970Jarochito 3 года назад

Yes what if the plastigage are different from another ? good question.

@michellemira5594 4 года назад

6d16 engine bearing clearance?

@gordongman3423 5 лет назад

Well none, look forward to the next video... Like your coffee cup, where can I get one..Lol

@JeepSolid 5 лет назад

Haha. Thanks. Sometimes need a strong cup of coffee. I think it's from the Cars movie.

@mariodesmo 5 лет назад

When are you going to have this thing running? Taking forever getting that engine back together! Get on it young man! lol

@JeepSolid 5 лет назад

Oh man, yeah. I know. Wish I had more time to spend on it, but I have another full time job and life stuff. Haha.

@vids595 Год назад

Main bearing in 4.0s dont really wear our normally because there are so many of them. The rod bearings are what would far more often need to be plastigaged.

@AndrewBrowner 5 лет назад

so what do you do if its too tight or too loose?

@JeepSolid 5 лет назад

Clean and reseat the bearing and check again. If it's still not in spec, may have to get different size bearing

@amberrivers81 5 лет назад

COOL channel

@JeepSolid 5 лет назад

Thanks! Glad to have you following along.

@SACTOWNOG 4 года назад

Should have shown more of the measuring.

@1970Jarochito 3 года назад

was that a 6 cyclyder motor or a V8 Motor ?

@mudpro200 3 года назад

It's an inline 6 cylinder 4.0 liter engine.

@GTRliffe 2 года назад

lock the crank, if it moves it’ll ruin the gauge. half the final torque is all that’s needed, the cap size is the same at half the torque

@MotorSwapDan Год назад

Dis

@davidholmes5698 Год назад

What size bearings you buy for 0.003 thousands Sir

@MotorSwapDan Год назад

Size 2

@midnight_raptor4086 5 лет назад

I was told there would be no math😂

@JeepSolid 5 лет назад

Haha!! Just a few numbers...

@toastyboysgaming8948 4 года назад

"Guys, don't move DRY metal on metal. it will scratch". All through the video "Don't move dry on dry metal. VERY end he wipes off the gauge while the cranks still on the block :P:P:P:P. It will be fine though i'm just playin.

@michellemira5594 4 года назад

6d16 engine bearing clearance?