Compression test
Compression test How hard are compression tests on a F-body I have pacesetter LTs i dont think it should be too hard except for #8
Im getting a bad noise on the passenger side in the valvetrain.
Friend#1 said comp.
Friend #2 said put a set of stock rockers back on. (its not rocker noise and is isolated to only the passenger side)
I had some rockers pull threads out of the heads and recently sent to machine shop to have the bosses for the rockers helicoiled. EVERYTHING in the engine is new, main bearings to rocker arms.
Im getting a bad noise on the passenger side in the valvetrain.
Friend#1 said comp.
Friend #2 said put a set of stock rockers back on. (its not rocker noise and is isolated to only the passenger side)
I had some rockers pull threads out of the heads and recently sent to machine shop to have the bosses for the rockers helicoiled. EVERYTHING in the engine is new, main bearings to rocker arms.
also is there any other recomendations? or ways to go about narrowing it down? I dont want to take the heads BACK off but if I have to there is no choice. Im tired of this damn car and its freakin luck... How can I know for certain if a lifter is collapsed ?
How hard are compression tests on a F-body I have pacesetter LTs i dont think it should be too hard except for #8
Im getting a bad noise on the passenger side in the valvetrain.
Friend#1 said comp.
Friend #2 said put a set of stock rockers back on. (its not rocker noise and is isolated to only the passenger side)
I had some rockers pull threads out of the heads and recently sent to machine shop to have the bosses for the rockers helicoiled. EVERYTHING in the engine is new, main bearings to rocker arms.
Im getting a bad noise on the passenger side in the valvetrain.
Friend#1 said comp.
Friend #2 said put a set of stock rockers back on. (its not rocker noise and is isolated to only the passenger side)
I had some rockers pull threads out of the heads and recently sent to machine shop to have the bosses for the rockers helicoiled. EVERYTHING in the engine is new, main bearings to rocker arms.
TECH Enthusiast
Joined: Mar 2008
Posts: 517
Likes: 1
I could see ANYTHING you do under the hood in these cars is a PITA. All the right bank cylinders will be tough. I don't really ave any tips for you, other than try going from underneath maybe, or start removing stuff to make space.
Although I don't think it's a compression issue. What does the noise sound like?
its like a solid tick. more solid then a pushrod but not a knock.
Buddy said if I have valvetrain issues a compression test should tell which cylinder. Im thinking about pulling off the coils, valve covers, and rockers and inspect the springs and retainers. (crossing fingers)
Buddy said if I have valvetrain issues a compression test should tell which cylinder. Im thinking about pulling off the coils, valve covers, and rockers and inspect the springs and retainers. (crossing fingers)
as far as the helicoils, when I was removing the stock rockers there was some galling on the threads and the new bolts with the harland sharps wouldnt even start. I always hand start every bolt. I just don't understand everything in the engine is NEW (with in give or take 500 miles) the harland sharps dont have any miles. The engine was rebuilt 500 miles ago the heads were installed at the same time with everything else.
Trending Topics
How hard are compression tests on a F-body I have pacesetter LTs i dont think it should be too hard except for #8
Im getting a bad noise on the passenger side in the valvetrain.
Friend#1 said comp.
Friend #2 said put a set of stock rockers back on. (its not rocker noise and is isolated to only the passenger side)
I had some rockers pull threads out of the heads and recently sent to machine shop to have the bosses for the rockers helicoiled. EVERYTHING in the engine is new, main bearings to rocker arms.
Im getting a bad noise on the passenger side in the valvetrain.
Friend#1 said comp.
Friend #2 said put a set of stock rockers back on. (its not rocker noise and is isolated to only the passenger side)
I had some rockers pull threads out of the heads and recently sent to machine shop to have the bosses for the rockers helicoiled. EVERYTHING in the engine is new, main bearings to rocker arms.
OR, to test for valve or ring problems (leak down), I also used a old spark plug (tr55) and gutted it out, shoved a male air hose connector and welded it up (yeah, having a welded is nice). Make sure #8 is on DTC on compression stroke, put the car into gear (keeps motor from turning once air is injected into cylinder, or use a socket wrech to hold crank from turning) and shoot some air (60-90psi) into the cylinder. If you have a massive leak, listen through the throttle body and exhaust to see if any air is excaping past valves. Remove the oil cap and listen aswell. You won't have any gauges hooked up, but trust me, if something is wrong you will hear it. Only 10% pressure loss is acceptable.
Good luck!
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
