Identify int/ext balance without removing pan??
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Identify int/ext balance without removing pan??
I did several searches and couldn't find an answer.
I have a 78 block so my crank should be internally balanced, but the balancer spacer is 'weighted', indicating it is externally balanced (I have no flywheel/flexplate at this moment). I have no history on this engine and I am unsure of the crank year. Is it possible to identify int/ext balanced crank without removing the pan?
I did find one post where someone mentioned you may be able to determine by the bolt pattern....is this true?
Also, is there any weighting differences between int/ext harmonic balancers or is all the weighting done with the spacer?
Thanks for any info!!
I have a 78 block so my crank should be internally balanced, but the balancer spacer is 'weighted', indicating it is externally balanced (I have no flywheel/flexplate at this moment). I have no history on this engine and I am unsure of the crank year. Is it possible to identify int/ext balanced crank without removing the pan?
I did find one post where someone mentioned you may be able to determine by the bolt pattern....is this true?
Also, is there any weighting differences between int/ext harmonic balancers or is all the weighting done with the spacer?
Thanks for any info!!
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Thanks for the response...but I guess I didn't make myself clear.
I know for sure my block is a 78, however, the spacer behind the harmonic balancer is 'weighted' or 'winged' or 'axe shaped' or however you want to call it.
I need to identify whether my crank is internally or externally balanced. I know interally is marked 2Y and externally is marked 3Y.
BUT.....is there a way of identifying the crank without pulling the oil pan???
I need to make sure the balancer spacer is matched to the crank. Then I can purchase the correct flexplate.
Thanks again
I know for sure my block is a 78, however, the spacer behind the harmonic balancer is 'weighted' or 'winged' or 'axe shaped' or however you want to call it.
I need to identify whether my crank is internally or externally balanced. I know interally is marked 2Y and externally is marked 3Y.
BUT.....is there a way of identifying the crank without pulling the oil pan???
I need to make sure the balancer spacer is matched to the crank. Then I can purchase the correct flexplate.
Thanks again
Post Fiend
Joined: Sep 2000
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From: Oregon
Sorry, bear with me cuz I've got the flu so my posts have been a little loopy. Looking back at this thread I see that I said it backwards above, they didn't switch over to "externally" balanced till 79...which would make it weird indeed for you to have the "winged" or externally balanced spacer if it really was a 78 engine. But the engine date code doesn't mean much anyways. To answer your basic question though, I don't know of a means of id'ing the crank without dropping the pan, sorry.
Post Fiend
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From: Western Central NV
Its been 10+ years ago, but I ran into a balance problem on a switch I did from a 289 to a 302. One thing I remember is the 289 flywheel was a different bolt pattern than the 302 so I had to find a flywheel for the 302 then get a different torque convertor. Would the internally balanced crank have the long balancer area? Just my thoughts. If you are sure of the year get the same year flywheel.
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Yea.....I figured I'd have pull the pan. I was just hoping the rear bolt holes on the crank could tell me whether it was internally or externally balanced.
Thanks for the help
Thanks for the help
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Originally posted by mobyhunr
I have a spare Im now working on. Its a 2y 1978 and I was told the spacer is missing. Is there a spacer not a hatchet I need? If so where do I get spacer ? thanks Jim
I have a spare Im now working on. Its a 2y 1978 and I was told the spacer is missing. Is there a spacer not a hatchet I need? If so where do I get spacer ? thanks Jim
Can you check your crank bolt hole spacing for me. I'm curious to know if the holes are evenly spaced or if any are off set, which would force the flywheel/flexplate to mount in only one location.
And yes you need a spacer without the weight (or hatchet). Besides the wreckers....I don't know were to find one. Maybe someone else can help you??
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Originally posted by Junkyard Slug
Just wondering, what are we looking for when we pull the pan? I assume is is a number?
Just wondering, what are we looking for when we pull the pan? I assume is is a number?