C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Timing Tab Missing

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Old Jan 24, 2010 | 09:22 PM
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quimbysr
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Default Timing Tab Missing

Looks like the clown who had my 85 before I did lost the timing tab. Does anyone know of anything I can do short of getting a new timing chain cover?
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Old Jan 24, 2010 | 10:37 PM
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quimbysr
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OK, I must have taken my stupid pills today. I finally realized that I could bolt a new pointer on with 2 of the cover bolts. I was thinking it was supposed to be tack welded on the cover. I think I may be been thinking of my Dad's Oldsmobile. Sorry to clog up the forum with a bad thread.
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Old Jan 25, 2010 | 09:22 PM
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I've always wondered how accurate that tab is? 1 degree off? 1/2 a degree off?

Anyone care to guess?
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Old Jan 26, 2010 | 12:32 AM
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The new tab has to be matched to the OD of the damper, even then I wouldn't trust it.

i'd buy an adjustable tab and use the positive stop method to located absolute TDC.

Jake
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Old Jan 26, 2010 | 02:52 PM
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your car is late enough to have the run of the mill tab from an auto parts store.
Just the early ones would be off.
On my 57, i went and bought a new harmonic balancer.........did the timing thing 4 or 5 times.
In the process of finding out what went wrong, i came across a blurb in Car Craft magazine that indicated Chevy relocated the timing tabs and timing marks on "newer" engines.
I removed the new balancer, compared to the old one for a look see, and sure enough, they moved the mark.
I used a chisel to mark the old timing mark, painted it with white-out, and that fixed the problem............Just a word to the wise.

Course now that I have a later engine in it, it's not a problem. But I bet there's a bunch of "old" harmonic balancers out there.......
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