Checking PTV/Lifter Preload/Pushrod Length

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Dec 10, 2016 | 03:35 PM

#21

93Rat

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Quote:

Originally Posted by RollinSScamaro

I am going to need to read through this thread real carefully soon.. this is the part of the job that confuses me the most and cant seem to get a grasp on it.. hopefully reading some of this over as im doing it will make more sense..i would have never expected it would be so tedious and complicated

I thought so too, but its really not. Assuming I did it correctly, it's actually pretty straight forward:

1) find base circle of cam
2) insert checker pr and bolt on rockers
3) extend tool until you find zero lash
4) count turns on checker to get pr length
5) repeat for each cylinder and average your measurements
6) add in desired preload to your average for final pr length
7) order pr

Dec 10, 2016 | 04:42 PM

#22

RollinSScamaro

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From: Frankenmuth, MI

Ok cool now that makes it way more simple for me to understand.. i thinm sometimes i get caught up in the wording.. i just found a solid you tube video for checking them on ls3, seems very easy to follow.

Hopefully that link works..

Dec 11, 2016 | 11:44 AM

#23

z-maro

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From: MN

Where does soaking the lifters in oil come into this?

Dec 11, 2016 | 11:52 AM

#24

Darth_V8r

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Quote:

Originally Posted by z-camaro

Where does soaking the lifters in oil come into this?

overnight before you put them in the block

Dec 11, 2016 | 12:14 PM

#25

RollinSScamaro

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From: Frankenmuth, MI

Do you just soak and install the lifters, put your heads on, then check pushrod length and add recommended preload? Just making sure im not missing anything.

Dec 11, 2016 | 12:15 PM

#26

93Rat

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Quote:

Originally Posted by Darth_V8r

overnight before you put them in the block

I was so torn on this because my Crane Cams books specifically says not to soak hydraulic lifters, but many seem to suggest it.

Dec 11, 2016 | 12:20 PM

#27

RollinSScamaro

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From: Frankenmuth, MI

Could you just use permatex ultra lube on them instead or does the oil need to soak into them or something? Is the onky purpose to protect them on a dry start up?

Dec 11, 2016 | 01:43 PM

#28

Darth_V8r

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The main reason I soak them is sometimes there is debris leftover from machining. I've never heard of soaking lifters being specifically disrecommended

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Dec 12, 2016 | 06:05 PM

#29

z-maro

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From: MN

So the soaking of the lifters has nothing to do with getting the correct length pushrods? You could soak them overnight, put them in the next day, then measure for pushrod length a few days later?

Dec 12, 2016 | 06:16 PM

#30

Darth_V8r

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Quote:

Originally Posted by z-camaro

So the soaking of the lifters has nothing to do with getting the correct length pushrods? You could soak them overnight, put them in the next day, then measure for pushrod length a few days later?

correct. Soaking will help keep them from sticking after you do stuff but that's about it.

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