Major valvetrain issue...need help.
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 822
Likes: 1
From: Henderson Texas
Major valvetrain issue...need help.
Ok so I have L92 heads with dual springs...I have had them on for 2 years with no issue. I went out the other day and was beating on the car a little and it was running fine and actually still is, but the car has a hellatious tick/tap to it now. So far I have done a compression test with all results being within 3% of each other. I have removed rocker arms and checked all of the needle bearings. I have checked all pushrods, and removed both inner and outer valve springs completely and inspected them. Anybody got anything else they can recommend before I yank the head?
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 822
Likes: 1
From: Henderson Texas
Honestly it doesn't sound like a lifter. It sounds almost like something right under the valve cover. I can't really say for sure, but I guess I am just going to have to pull the heads to check.
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
Ok so I have L92 heads with dual springs...I have had them on for 2 years with no issue. I went out the other day and was beating on the car a little and it was running fine and actually still is, but the car has a hellatious tick/tap to it now. So far I have done a compression test with all results being within 3% of each other. I have removed rocker arms and checked all of the needle bearings. I have checked all pushrods, and removed both inner and outer valve springs completely and inspected them. Anybody got anything else they can recommend before I yank the head?
I would try to isolate which cylinder it is by removing the valve cover and having someone tap the key once or twice. Pull the fuse for the fuel pump.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
You could yank the pushrods out of 1 cylinder at a time and run the engine. The lifters will get suspended in the retainers and if the noise goes away, you know what cylinder it is. That's what the Great Taylor from Dallas Performance would do.
