Loud tapping or knocking noise
Thread Starter
Advanced
Joined: May 2000
Posts: 58
Likes: 0
From: Austin, TX
Loud tapping or knocking noise
'84 with 92,000 miles on stock engine - just heard a tapping or knocking noise (for about 5 minutes while setting/driving in traffic then quit). Pulled over, lifted the hood - sounds like a stuck lifter? The car was about a quart low on oil, which it burns about every 4000 miles. :confused:
Instructor
Joined: Oct 2000
Posts: 206
Likes: 0
From: Nashville, Tn. 37211 TN.
Re: Loud tapping or knocking noise (Tonys84)
Sounds like the only choice you have to make is rebuilt or new crate motor. My motor was replaced at 182,000 miles. I opted for new short block. After all was said and done cost was around $3000. I did do much of the work myself.
It was well worth the effort. :cool:
It was well worth the effort. :cool:
Thread Starter
Advanced
Joined: May 2000
Posts: 58
Likes: 0
From: Austin, TX
Re: Loud tapping or knocking noise (John Robatto)
Sorry! The tapping quit. The engine has ran strong ever since I bought the car (it had 63k then). It ran and sounded fine this morning.
Le Mans Master
Joined: Aug 2000
Posts: 5,192
Likes: 1
From: Airport Cruise-in 1 Veteran Airport Cruise-in 2 Veteran
Cruise-In II Veteran
Re: Loud tapping or knocking noise (Tonys84)
If it sounds ok now then that's probably what it was, low oil.
The burning every 4k mi is'nt too bad. I burn a quart every 1k and she pulls like a beast! :yesnod:
The burning every 4k mi is'nt too bad. I burn a quart every 1k and she pulls like a beast! :yesnod:
Drifting
Joined: Aug 2000
Posts: 1,316
Likes: 0
From: Houston, TX
Re: Loud tapping or knocking noise (John Robatto)
Tony join the Cross Fire Vault too. Corvette Forum is great, but if you have a cross fire car, check it out http://www.crossfire.homeip.net
Safety Car
Joined: Mar 2000
Posts: 3,620
Likes: 2
From: Hillsboro OR
Re: Loud tapping or knocking noise (Tonys84)
Lifters seem to stick when they get older. It could be from varnish build up in the lifter or failing lifter. If you decide to change the lifters, you will have to replace the cam. New lifters on a used cam is not recommended. I would also change the timing chain at that time. Then there's the oil consumption which is probably valve guides. One qt ever 4k isn't bad. If you want to fix that, the heads need work. Of course you can see where this is going. Heads, cam, gaskets.........motor.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Advanced
Joined: May 2000
Posts: 58
Likes: 0
From: Austin, TX
Re: Loud tapping or knocking noise (AquaMetallic94LT1)
Thanks for confirming my suspicions. My late dad was an auto tech and I have done quite a bit of work, but I always like to get a second opinion. :flag
