Crossfire engine wiped cam?
Thread Starter
Racer
Joined: Nov 2018
Posts: 295
Likes: 104
From: Toronto Canada
Crossfire engine wiped cam?
Hi guys, I was wondering how you would know if the cam is bad in the crossfire? What would be the symptoms? I remember Lars saying that some of the 82's had soft cams and that there is slight miss when idling? Any more info about this condition would be greatly appreciated.
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
Hi guys, I was wondering how you would know if the cam is bad in the crossfire? What would be the symptoms? I remember Lars saying that some of the 82's had soft cams and that there is slight miss when idling? Any more info about this condition would be greatly appreciated.
Jebby
Le Mans Master
Joined: May 2007
Posts: 5,025
Likes: 1,120
From: North tonawanda NY
Hi guys, I was wondering how you would know if the cam is bad in the crossfire? What would be the symptoms? I remember Lars saying that some of the 82's had soft cams and that there is slight miss when idling? Any more info about this condition would be greatly appreciated.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
If you have the standard rocker arms, you can buy some aluminum clips that fit on the arm and block the oil flow. They come in sets of 8.
Pull one valve cover at a time. Install the oil retaining clips and a strip of narrow cardboard. Jam the cardboard between the valve springs and the V.C ledge.
Start the engine, but do not rev. Take note of any rockers that appear lazy. Shut it down and check valve-lash of suspected valves. Button everything back up and do the other bank.
A compression test usually will show somethings amiss on the valvetrain. If the cylinder can not fill, the compression test is lower on that cylinder.
Why can't a cylinder fill fully? A wiped cam lobe.
See if certain loose valve-lash matches any cyl with low compression.
Pull one valve cover at a time. Install the oil retaining clips and a strip of narrow cardboard. Jam the cardboard between the valve springs and the V.C ledge.
Start the engine, but do not rev. Take note of any rockers that appear lazy. Shut it down and check valve-lash of suspected valves. Button everything back up and do the other bank.
A compression test usually will show somethings amiss on the valvetrain. If the cylinder can not fill, the compression test is lower on that cylinder.
Why can't a cylinder fill fully? A wiped cam lobe.
See if certain loose valve-lash matches any cyl with low compression.
