79 350 ballancer
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79 350 ballancer
ok I found out why engine in my vette wouldn't time right ,TDC is 12 degrees on timing tab ,either the timing chain is off ,or the ballancer has slipped or is incorrect ,can someone with a 79 corvette 350 tell me what ballancer diameter it should have and what timing tab should it have thanks
Le Mans Master
Joined: Oct 2006
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From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
See where the keyway is in relation to the TDC mark. GM changed them somewhere. One the mark and the keyway are nearly lined up and the other one is 10-15* off. Easy to correct- bolt on tab.
Le Mans Master
Joined: Sep 2001
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From: Unreconstructed, South Carolina
Tim:
No ... Not late model C3 ... look at some later trucks etc ... have a metal "tube" spot welded near center of timing cover ... with crowded bay, you down look thru it to see mark ... those have the 40* split ... I mention it to help prevent someone from mistakenly accepting its damper for another vehicle.
perhaps mid-90's C4 has similar??? I dunno???
No ... Not late model C3 ... look at some later trucks etc ... have a metal "tube" spot welded near center of timing cover ... with crowded bay, you down look thru it to see mark ... those have the 40* split ... I mention it to help prevent someone from mistakenly accepting its damper for another vehicle.
perhaps mid-90's C4 has similar??? I dunno???
Safety Car
Joined: Oct 2000
Posts: 3,593
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From: Southern Indiana
Tim:
No ... Not late model C3 ... look at some later trucks etc ... have a metal "tube" spot welded near center of timing cover ... with crowded bay, you down look thru it to see mark ... those have the 40* split ... I mention it to help prevent someone from mistakenly accepting its damper for another vehicle.
perhaps mid-90's C4 has similar??? I dunno???
No ... Not late model C3 ... look at some later trucks etc ... have a metal "tube" spot welded near center of timing cover ... with crowded bay, you down look thru it to see mark ... those have the 40* split ... I mention it to help prevent someone from mistakenly accepting its damper for another vehicle.
perhaps mid-90's C4 has similar??? I dunno???
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Point is, there are several different combinations of timing marks, front covers, timing tabs and balancers. Over the years it's all become scrambled up and very easy to mix and match and have the timing marks appear in all sorts of odd places.
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Le Mans Master
Joined: Sep 2001
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From: Unreconstructed, South Carolina
Tim:
I know you're mean well when you might suggest a slipped outer ring or a mismatched damper & tab, etc etc ... but
There are later GM & Chevy vehicles that have about 40* split at damper ... if someone were to try to use that damper with a typical C3 timing tab, it would never align right ... while it would align if used om intended app.
I've seen them on trucks ... by the same token, if someone tried to use a C3 damper on such a truck it also would never align right.
I know you're mean well when you might suggest a slipped outer ring or a mismatched damper & tab, etc etc ... but
There are later GM & Chevy vehicles that have about 40* split at damper ... if someone were to try to use that damper with a typical C3 timing tab, it would never align right ... while it would align if used om intended app.
I've seen them on trucks ... by the same token, if someone tried to use a C3 damper on such a truck it also would never align right.
Melting Slicks
Joined: Dec 2009
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From: Thunder Bay
Why don't you buy yourself a timing tape for the balancer, establish exactly where TDC is and install the tape? I would also mark the damper in some way so you will know if the outer ring is rotating on the hub just in case that is the source of your problem.
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I have a aluminum balancer cover on the balancer , TDC on the cover lined up with the balancer TDC ,and when we located tdc( by placing a coat hanger in no. 1 cylinder) it is 12 on balancer soooo, I was wondering if the 6 3/4 balancer is correct for a 79 350 non L-82 ,or if balancer is slipping or has slipped what is a good way to tell, then what is a good fluid balancer to go with ,resonably priced
Racer
Joined: Nov 2011
Posts: 319
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From: South Chase WI
I have the same dillemma on my '81. Connected the light to #1, un plugged the dist 4 wire plug to put in base timing mode, fire it up and no mark anywhere. Put the light on #2 and there is the mark, over to the passenger side. Watch it move as I turn the dist, timed it by ear, runs great....but if the balancer is slipped it would be nice to know, so I could replace it and not have a mess when it lets go.
