valve question?
Race Director
Joined: May 2006
Posts: 10,691
Likes: 71
From: Phoenix Arizona
It is probably one of the easiest jobs to do on an 84, not much harder than replacing the valve covers (very common). You might try it yourself. Try tightrning them 1/4 to 1/3 of a turn. If it still makes noise, you have other problems (Bad lifter or cam). Additives often work on engines that don't get driven much.
Race Director
Joined: Jun 1999
Posts: 14,924
Likes: 9
From: Merritt Ils Fl
Go to Harbor Freight( or any parts store) pay $5.00 for a mechanics stethoscope. Spend some time listening to each cylinder through both the intake runners and the exhaust. Listen for differences in sound. I wager you will find the offending lifter, if it is a lifter. Also listen to each injector. Injectors have a click that can become quite loud.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Bet what youre hearing is fuel injectors, they make noise as Muffin said.
Perfectly normal.
hydraulic lifters rarely if ever have to be adjusted.
If youre going to do them do all of them and no you dont just tighten them down.
Stethescope then go from there.
Perfectly normal.
hydraulic lifters rarely if ever have to be adjusted.
If youre going to do them do all of them and no you dont just tighten them down.
Stethescope then go from there.
Drifting
Joined: Dec 2007
Posts: 1,647
Likes: 4
From: Argillite KY
BTW, Harbor Freight has their electronic stethoscope on sale. I thought it was a gimmick but I tried one anyhow. It comes with different length probes and a set of headphones. It's great for filtering out background noise and is very, very sensitive. It has a sensitivity/volume control rheostat on it and works just great. I'm never going back to my old one.
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
Race Director
Joined: Jun 1999
Posts: 14,924
Likes: 9
From: Merritt Ils Fl
BTW, Harbor Freight has their electronic stethoscope on sale. I thought it was a gimmick but I tried one anyhow. It comes with different length probes and a set of headphones. It's great for filtering out background noise and is very, very sensitive. It has a sensitivity/volume control rheostat on it and works just great. I'm never going back to my old one.
Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
Stay away from oil additives.
-They are snake oil
-They claim to do what oil already does.
-They are snake oil
-They claim to do what oil already does.