INSANE noise from the new lifters
Ok. I have the same problem. I did a larger cam than you, but my car has 78K miles on it. Aftr checking everything, im about 99% sure its a lifter. The car idles crazy taps like a a ****, and the exaust kinda bubles/pops.. i think that more than likely the old stock lifters coudnt handle the increased seat preasure of the new springs causeing them to pump up. Ill tell you saterday if it is, cause im putting new comp 850's in this weekend with my new heads.
check the easy stuff first.
chris
check the easy stuff first.
chris
Thread Starter
Joined: Jun 2004
Posts: 5,125
Likes: 4
From: Alexandria, VA
Yea, I'm beginning to think it's a broken lifter/bent valve... I'm gonna make absolutely sure it isn't the pushrods or rockers first though. Let me know how that comes out.
Thread Starter
Joined: Jun 2004
Posts: 5,125
Likes: 4
From: Alexandria, VA
Well, I just checked the pushrods and they are all perfectly fine. So I'm gonna put them all back two at a time and turn the engine over and see where this **** is coming from. I'm also gonna put the stock plugs back in and see if that helps anything.
On The Tree
Joined: Feb 2004
Posts: 143
Likes: 0
From: Texas
Did u look at your cam retainer plate. When I took mine off it was smooth to the touch. The new one has silicone on it that protrudes from the surface so u can get a good seal for the lifters. I don't know if it is that important but I bought a new one for $15 at the dealer (stealer). I read somewhere that it was recommended that u replace it when u do a cam install.
Originally Posted by chrismcdaniel
Ok. I have the same problem. I did a larger cam than you, but my car has 78K miles on it. Aftr checking everything, im about 99% sure its a lifter. The car idles crazy taps like a a ****, and the exaust kinda bubles/pops.. i think that more than likely the old stock lifters coudnt handle the increased seat preasure of the new springs causeing them to pump up. Ill tell you saterday if it is, cause im putting new comp 850's in this weekend with my new heads.
check the easy stuff first.
chris
check the easy stuff first.
chris
i repaced my lifters/valvesprings/pushrods getting prepared for my cam swap this summer
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From: Bring it........ b*tch
Sounds like it's time to pull the heads to me. The sound described sounds like bent intake valves that made contact with the pistons. If your timing was "way" off before, the likelihood is that you had piston to valve contact and bent them. Even if you fixed the timing, you'd still have bent valves.
I wouldn't rely on a compression test, if it's a REALLY loud clackity clackity type sound, sure sounds like valve contact to me. Even if it's collapsed lifters you'd still have to pull the heads.
I wouldn't rely on a compression test, if it's a REALLY loud clackity clackity type sound, sure sounds like valve contact to me. Even if it's collapsed lifters you'd still have to pull the heads.
Originally Posted by JF WS6
Sounds like it's time to pull the heads to me. The sound described sounds like bent intake valves that made contact with the pistons. If your timing was "way" off before, the likelihood is that you had piston to valve contact and bent them. Even if you fixed the timing, you'd still have bent valves.
I wouldn't rely on a compression test, if it's a REALLY loud clackity clackity type sound, sure sounds like valve contact to me. Even if it's collapsed lifters you'd still have to pull the heads.
I wouldn't rely on a compression test, if it's a REALLY loud clackity clackity type sound, sure sounds like valve contact to me. Even if it's collapsed lifters you'd still have to pull the heads.
It sounds like they just did a compression test and not a true leak-down test, so that's not revealing at all in a case of bent valves. The only real way to know is to go in and look.
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From: Bring it........ b*tch
Originally Posted by white2001s10
Those are my thoughts exactly.
It sounds like they just did a compression test and not a true leak-down test, so that's not revealing at all in a case of bent valves. The only real way to know is to go in and look.
It sounds like they just did a compression test and not a true leak-down test, so that's not revealing at all in a case of bent valves. The only real way to know is to go in and look.
Thread Starter
Joined: Jun 2004
Posts: 5,125
Likes: 4
From: Alexandria, VA
Yea, I'm gonna try the leak-down by putting my ear up to it and listening. But, I am leaning more and more towards pulling the heads. UGH... We will find out this weekend. 
On The Tree
Joined: Sep 2004
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From: St. Clair
My car sounded like a '72 Pinto with 200,000 miles on it after the cam swap...Put the adjustable Crane Rockers on and instantly...Sounds like it rolled off the assembly line...
Sounds alot like lack of pre-load to me...
Peace...Gman
Sounds alot like lack of pre-load to me...
Peace...Gman
Originally Posted by Gman2002Z06
Sounds alot like lack of pre-load to me...
The fact that it was stated that it was put together out of time before would worry me the most.
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From: Bring it........ b*tch
Originally Posted by white2001s10
Lack of preload is noisey for sure, but how do you suppose his heads grew about .100" away from the block? Or perhaps a cam with an extremely small base?
The fact that it was stated that it was put together out of time before would worry me the most.
The fact that it was stated that it was put together out of time before would worry me the most.
Thread Starter
Joined: Jun 2004
Posts: 5,125
Likes: 4
From: Alexandria, VA
The heads will be coming off... no doubt about that. I'm banking on a bent valve or busted lifter. We shall see come this weekend, hopefully. Thanks for all the help guys.
lifters just wondering if you changed ur cam? a buddy of mine got a real high lift cam and b/c of that he had to shave down metal under is valve covers to avoid hitting them. i know all you changed was lifters just wondering if you changed the cam too and forgot that step.
He had a valve break off and embed itself in a piston. Look at this thread https://ls1tech.com/forums/generation-iii-internal-engine/296794-what-knocking.html .
Steve
Steve
Originally Posted by ArcticZ28
The heads will be coming off... no doubt about that. I'm banking on a bent valve or busted lifter. We shall see come this weekend, hopefully. Thanks for all the help guys.
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From: Warner Robins, GA
Originally Posted by bigbipo
well?? was it valves?? After reading this thread I still cant understand why u cant figuer out if it was valves or lifters.. removing some pushrods along with sparkplugs should be a good idea to help pin-point the noise if it was a lifter.. You could even hold the pushrods in ur hand at idle, its not hard to figuer out lifter noise... Their should be some way to check valve lash on rockers or pushrod length. obviously if lash is to much it would give you taht tap-it sound...