92 lt1 lifter noise
Thread Starter
Instructor
Joined: Nov 2002
Posts: 136
Likes: 0
From: ELLICOTT CITY MD
92 lt1 lifter noise
i have had a lifter noise since i purchased the car 2 years ago. the noise is the type of sound you would get if the valves were out of adjustment. the valves have been adjusted three times by different people with the same result. still ticking. the tick is only above idle or only noticable above idle. are all the early lt1 motors noisy like that or do i have something wrong. if so what could it be? lifter bleeding down? thanks for any info you might have. 
Melting Slicks
Joined: May 2001
Posts: 3,014
Likes: 18
From: Raleigh, NC
If the noise won't go away, I would suspect a bad lifter. Especially if the lifters have a lot of miles on them, or high tension valve springs. Sometimes roller rockers are just noisy though, what brand are your 1.6's?
Melting Slicks
Joined: May 2003
Posts: 2,496
Likes: 1
From: alaska
mines noisy too,has been since i got it at 31.5k miles.is now at 40k miles.
in 93 there was several noise reducing items added to the lt1.
the cam was even rounded on the backside a little bit to reduce dropoff noise.(this is where the torque increase in 93 came from,it was an unintended plus). there was also some fuel line clamping and exhaust shielding changes,all addressing engine noise.
plug a vacuum gauge on to an engine vacuum source and watch for a quivering needle if you think you have a lifter collapsing,but from what i understand our 92 lt1's are just gonna be a little noisy.
good luck
in 93 there was several noise reducing items added to the lt1.
the cam was even rounded on the backside a little bit to reduce dropoff noise.(this is where the torque increase in 93 came from,it was an unintended plus). there was also some fuel line clamping and exhaust shielding changes,all addressing engine noise.
plug a vacuum gauge on to an engine vacuum source and watch for a quivering needle if you think you have a lifter collapsing,but from what i understand our 92 lt1's are just gonna be a little noisy.
good luck
Advanced
Joined: Apr 2003
Posts: 60
Likes: 0
From: Cedar Park TX
I read in "Corvette Black Book" that the early LT-1's (92 as I remember) had mucho valve noise. Mine's a 92. (When it was running) It too is/was noisy. Very annoying. Making it worse is noise from the fuel pressure regulator. According to the book, they changed the valve cover material to be more soundproof, but not sure if they are interchangeable. I just decided to live with it. A co-worker has a 94, which was supposed to be quieter, but is about as noisy as my 92.
-GeorgeC
-GeorgeC
Instructor
Joined: Dec 2003
Posts: 161
Likes: 7
From: Lansing MI
Noisy as hell!
I have the same problem with my 92. I took it to a mechanic that has vast experience with the Caprice LT1 cop cars. I asked him to pop off the valve covers to see if he could determine the cause of the racket. He told me it was very typical of these motors and no cause for alarm.
I do agree however that it is somewhat annoying to the extent that it's almost embarrassing at stop lights. It runs great with no apparent ill effects from the clatter so I guess it's just something we have to live with.
I do agree however that it is somewhat annoying to the extent that it's almost embarrassing at stop lights. It runs great with no apparent ill effects from the clatter so I guess it's just something we have to live with.
Le Mans Master
Joined: Feb 2002
Posts: 7,858
Likes: 2
Originally Posted by LT1 Tom
I do agree however that it is somewhat annoying to the extent that it's almost embarrassing at stop lights.
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Advanced
Joined: Feb 2017
Posts: 87
Likes: 16
From: Aylmer Ontario
I know this is a old thread but...
I have the same problem with my 92. I took it to a mechanic that has vast experience with the Caprice LT1 cop cars. I asked him to pop off the valve covers to see if he could determine the cause of the racket. He told me it was very typical of these motors and no cause for alarm.
I do agree however that it is somewhat annoying to the extent that it's almost embarrassing at stop lights. It runs great with no apparent ill effects from the clatter so I guess it's just something we have to live with.
I do agree however that it is somewhat annoying to the extent that it's almost embarrassing at stop lights. It runs great with no apparent ill effects from the clatter so I guess it's just something we have to live with.
Team Owner
Joined: Aug 2004
Posts: 21,543
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From: Park City Utah
Advanced
Joined: Feb 2017
Posts: 87
Likes: 16
From: Aylmer Ontario
Drifting
Joined: May 2007
Posts: 1,426
Likes: 165
From: Motor City
Not sure about 92’s, but the 93 Multec injectors are freaking loud. I chased a ticking noise that I thought was a lifer...well after 3 sets of lifers over the years, and now a brand new engine (different story behind that) it still ticks like crazy. I’m almost positive it’s the stock injectors. Will know for sure next year when I replace them.
