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Generation III Internal Engine
1997-2006 LS1 | LS6
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Old 05-17-2007, 01:15 PM   #1
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Default Whats the worst a collapsed lifter can do?

my engine has an annoying tick that come and goes, im 99% its a bad lifter, and right now i happen to be at a point that i could pull the heads and switch them pretty easily, i just dont have the money

So my question is, if i dont pull the heads and keep the clicking lifter, what is the worst thing that can happen? also my car is turboed so it make a very large amount of power,

thanks guys

also im 99% sure its a lifter because it dosent always make noise, my oil presure is always 50+ and performance hasnt been affected
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Old 05-17-2007, 01:22 PM   #2
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The lifter can come apart and damage the block and cam.
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Old 05-17-2007, 01:23 PM   #3
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Its a game of Russian Roulette.. A collapsed lifter can cause problems, such as intake backfiring, detotation, upper valvetrain damage, camshaft damage, or worse, the lifter can come apart and drop the needles into your oil pan and get passed through the oiling system. It could happen today, it could happen a year from today, but ask yourself, is it worth it to fix it now, or replace the motor later on?
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Old 05-17-2007, 01:32 PM   #4
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Quote:
Originally Posted by TchargedLS1TA
Its a game of Russian Roulette.. A collapsed lifter can cause problems, such as intake backfiring, detotation, upper valvetrain damage, camshaft damage, or worse, the lifter can come apart and drop the needles into your oil pan and get passed through the oiling system. It could happen today, it could happen a year from today, but ask yourself, is it worth it to fix it now, or replace the motor later on?
i guess ill be pulling the heads today, dammit!
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Old 05-17-2007, 01:51 PM   #5
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There are no needle bearings in a lifter (rocker yes, lifter no!)

A collapsed lifter will result in more noise.

There is only about .020" that changes so the odds of the pushrod jumping out are pretty slim.

I wouldn't be racing around on it, but I don't think your risking much.
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Old 05-17-2007, 02:24 PM   #6
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Quote:
Originally Posted by heavymetals
There are no needle bearings in a lifter (rocker yes, lifter no!)

A collapsed lifter will result in more noise.

There is only about .020" that changes so the odds of the pushrod jumping out are pretty slim.

I wouldn't be racing around on it, but I don't think your risking much.
Oh yes there is chief, along with several other pieces that can do some damage.. The LS1 lifters are junk IMHO.. The most common problem is them collapsing, or getting crud in the sripng cup and not allowing the lifter to pump up completely. Other problems I have seen is the crown that holds the roller shaft just breaks because there is not a whole lot of reinforcement- and issue that was fixed with the LS2/7 engines.. Thats why it is a good idea to upgrade to at least the new design lifters.. P/N 12499225, for $100, you cant go wrong..
Your making a wise choice to change them now.. Yes, having only .020" may not seem like enough to cause damage, but its enough to beat the lifter and you cam to death when its happening a couple thousand times a minute...
Click the image to open in full size.
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Old 05-17-2007, 02:49 PM   #7
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I stand corrected.

There are needle bearings in the little buggers.
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Old 05-17-2007, 03:03 PM   #8
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I have seen more then once lifters tearing up complete motors.
I myself had my car on the dyno on a monday and all looked good.
Made great power etc.
Pulled the motor as I was going bigger and pulled the pan.
Found pieces of the lifter in the pan.
Flipped the block over and the block was cracked, cam was dicked all to hell and the motor was no good.
Ended up pulling the heads and they were fine.
Sold the heads and threw away the shortblock.
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Old 07-23-2007, 03:17 PM   #9
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How can you tell if you have a bad lifter??????????????
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Old 07-23-2007, 04:16 PM   #10
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is a 70 dollar lifter set worth a couple thousand for a new motor? if so then u dont need to be doing wat ur doing
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Old 07-23-2007, 04:50 PM   #11
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Quote:
Originally Posted by 1INSANEGTO
How can you tell if you have a bad lifter??????????????
Tap tap tap tap tap tap tap tap tap tap tap tap tap tap tap tap
Alot of times we have also seen the front 02 sensor on the same bank read .000mV or a really low number
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Old 07-23-2007, 04:50 PM
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