Cam Timing

Reply Subscribe

Thread Tools

Search this Thread

Feb 7, 2001 | 10:42 PM

elsmith

Thread Starter

Tuned

Joined: Jan 2000

Posts: 326

Likes: 0

From: Phoenix

Cam Timing

Does any one know how to set the cam timing. I replaced the timing chain in my 352 lining up the marks like the shop manual says to but I can't get the truck to run right. It will backfire through the carb no matter where the timing is set. I was thinking about getting a compression tester and setting the timing where the highest compression is. Will this work? Thanks Eric

Feb 7, 2001 | 11:12 PM

oz9609

Senior User

Joined: Dec 2000

Posts: 245

Likes: 0

Cam Timing

Did the chain go out while you were running it? If so, check and see that you haven't bent a pushrod.

Feb 8, 2001 | 11:21 AM

DBF

Junior User

Joined: Apr 2000

Posts: 89

Likes: 0

Cam Timing

Try rotating your distributor 180 degrees, it happens all the time that it's on the exhaust stroke and not the compression stroke.

Jim

Feb 8, 2001 | 01:10 PM

elsmith

Thread Starter

Tuned

Joined: Jan 2000

Posts: 326

Likes: 0

From: Phoenix

Cam Timing

All It does if I change the distributor around is blow air out the carb So I think it is the cam timing. Thanks Eric

Feb 9, 2001 | 07:46 AM

77 steve

Junior User

Joined: Apr 2000

Posts: 77

Likes: 1

Cam Timing

Need more info, what was the reason for cam chain replacement? How was the engine running before? If you line up the two marks there is not much more you can do with a stock timing set.

Feb 9, 2001 | 09:43 AM

karljay

Cargo Master

Joined: Jul 2000

Posts: 2,281

Likes: 18

From: Northern California

Cam Timing

I would take a compression reading. You should have about 160#. Don't forget to remove all the plugs and hold the carb wide open. If the cam timming is off by one tooth, I think it would run real bad, most cams will allow only about 6~8 deg change and still run good. A cheap trick for cam timmers is to move the cam until you get max compression, this is an alternative to using a degree wheel.