timing problem


Old 04-11-02, 06:57 AM
Visiting Guest
Posts: n/a
timing problem

having a problem setting the timing on my camaro. Have new crate engine in it and the car will not run with the timing set anywhere near the right setting. When set at less that 20 or 25 BTDC it has no power and over heats quickly. have had it as much as 50 degrees BTDC and it ran OK, until breaking a starter by trying to start backwards. Strangest part to me is that the closer I set it to 12 or even 8 degrees BTDC the more it heats up. I would think advancing the timing would cause it to heat more. The harmonic balance is off a 305, and I am running a 350. Are they different?
Sponsored Links
Old 04-11-02, 09:50 AM
Visiting Guest
Posts: n/a
Year? Original engine? Performance engine? (If a 305 can be considered a performance engine..lol) Mileage? Has the timing chain been changed?

That being said, if the car has computerized controls (1981 or newer in most cases) putzing with the timing is a collosal waste of time, gaining you nothing. The computer controls the timing.

The only time you need to reset the timing is to do base timing when you change the timing chain, etc. Do not putz with the timing on a computer controlled car. It usually does more harm than good.
Old 04-11-02, 07:35 PM
Join Date: Mar 2002
Location: Louisiana
Posts: 438
I can't answer your question about the harmonic balance, call your local parts store and they should be able to tell you.
About your timing, I assume you disconnected computer EST control prior to timing with the light. If not, unplug it, (should be close to your brake vacuum booster) time it to spec, and then re-connect EST. You'll need to clear your code in the computer when your done.

I've had people tell me that the GM 350 computer has trouble adjusting the timing if the #1 wire position on the distributor cap is not close to pointing towards the #1 cylinder. I'm not sure if this is true or not but you may want to give it a try.

Let me know what you find out.
Old 04-12-02, 05:21 PM
Join Date: Mar 2002
Location: Louisiana
Posts: 438
...also, I should have mentioned that you can't use the 305 timing chain cover on the 350. The timing marks are in a different location.
Old 04-15-02, 06:18 PM
Visiting Guest
Posts: n/a
Problem solved. I was using the wrong timing cover. Bought a crome after market and didn't know the marks was different.
Old 04-15-02, 06:31 PM
Join Date: Apr 2002
Location: Pittsburgh,Pa
Posts: 2,417
Ihad a similar problem.Mine was in a Blazer though,seems they put the mark on the cam gear in the wrong spot and my valve timing was off by 1 tooth.I found this after much searching and comparing a known good cam gear to the one on the truck.I would also check the crank gear who knows?It is also possible your balancer has spun making tdc null and void.you can check this by removing the timing cover aligning the gears and temporarily installing the timing cover.If your not on tdc she spun on you that will cause your timing readings.Good Luck.
Old 04-16-02, 08:58 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,813
good thought davo. You can check for TDC much easier through #1 spark plug hole with a screwdriver. A balancer that has slipped MUST be replaced. It is dangerous, and can really tear up stuff under the hood.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes