Help noise on decel
Thread Starter
Teching In
Joined: Feb 2014
Posts: 48
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Help noise on decel Hey everyone any idea what the noise is in the video? It is only on the passenger side and on decel. I just did notice it right before I was going to call it done. It is a 02 WS6. I just installed new headers, y pipe, catback, motor mounts, steering rack, water pump and a comp cam belt tensioner. Definitely sounds like it is under the valve cover.
It does sound like valvetrain. I'd just removed the belt and give it a quick rev to eliminate any accessory noise.
If it is still there, pull the valve cover and inspect
If you don't notice anything replace the lifters
If it is still there, pull the valve cover and inspect
If you don't notice anything replace the lifters
Thread Starter
Teching In
Joined: Feb 2014
Posts: 48
Likes: 1
Cold start there is no difference in the noise. Removed the belt still there. Removed the valve cover. Visual everything looks good. Nothing felt loose. I removed cylinder 2 and 4 rockers. Nothing looks odd. Any idea how much play the trunnion should have in the needle bearings? If i had to guess there is about. 003 to .005 in all directions.
You will want to check for play with the lifter on the base of the camshaft. What I'd do is work on one cylinder at a time and use the EOIC method to get each lifter on the base of the cam. Then I'd remove the rocker arm to inspect it and the pushrod. Inspect the ***** of the PR for wear, and verify length and straightness. Also make sure they're not clogged restricting oil and if all checks out install it back onto the cup of the lifter, reinstall the rocker arm and torque to 22ft lbs. Repeat for all the rocker arms on the passenger side if you've isolated the noises to that side.
EOIC when the Exhaust Valve begins to open the Intake Valve is on the base of the camshaft and you can work on it and once your done there you turn the engine over until the Intake Valve has opened and begins to close and then you can work on the Exhaust Valve. Do this for each cylinder or just remove all the rocker arms and pushrods keeping track to what goes where and inspect the parts and then bolt them all back down and torque everything to 22ft lbs regardless if your on the base of the cam or not. I've heard of people doing this but I certainly do not recommend it. This is where a remote starter switch come in real handy.
EOIC when the Exhaust Valve begins to open the Intake Valve is on the base of the camshaft and you can work on it and once your done there you turn the engine over until the Intake Valve has opened and begins to close and then you can work on the Exhaust Valve. Do this for each cylinder or just remove all the rocker arms and pushrods keeping track to what goes where and inspect the parts and then bolt them all back down and torque everything to 22ft lbs regardless if your on the base of the cam or not. I've heard of people doing this but I certainly do not recommend it. This is where a remote starter switch come in real handy.
Two reasons why I installed a solenoid up by the battery. One to get the power off of the starter at all times and second for connecting my remote starter switch. Even with the key out of the ignition you will be able to bump the engine over to watch the valve events when the remote starter switch is connected to the solenoid.
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A few years back I had a heck of a noise, sounded like a piledriver. I figured it was a lifter. Had the lifters pulled and replaced and did a cam swap. The old lifter roller tips looked fine. No damage. Maybe 1 or 2 weren't pumping up all the way.
Thread Starter
Teching In
Joined: Feb 2014
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Well I think I found the problem. Looks like it is time to upgrade. Correct me if I am wrong but oil should be squirting out of them. Time to see what the vendors have to offer. Might as well throw a cam in it while I'm in there. I attached a video if anyone wants to see what I am seeing and offer any advice. Thanks
Did it run long enough to let the oil build up in the lifters? What does your oil pressure look like and you may just have some clogged lifters that could clear up with some Seafoam. Some engine treatments might help here but it could also do more harm than good. I was trying to clean up an engine from sludge build up and had used ATF and Engine Flush but once that stuff started breaking down I had a clogged pickup tube and it just went South from there until I had to tear it down.