Pilot Bearing Selection...

[Terry M.]

[Terry M.]

[Clem Z.]

Re: How do you correct the alignment?

install the bell housing on the block without the dowel pins,clamp a dial indicator to the crank shaft and turn the crank while the indicator runs on the locator bore in the bell housing. with the bolts just snug enought to allow you to tap the bell housing with a mallet you check the runout at 12-3-6-9 oclock and bump the bell housing with a mallet till you get it within .005. i tighten the bolts and then i ream the dowel pin holes to the next std size with a reamer and use CRS rod to make the new dowels. i would check first with the stock dowel pins to see if you are lucky enought to be in line. there are also offset dowels from lakewood but i have found they are a PIA to work with.

[Clem Z.]

Re: How do you correct the alignment?

install the bell housing on the block without the dowel pins,clamp a dial indicator to the crank shaft and turn the crank while the indicator runs on the locator bore in the bell housing. with the bolts just snug enought to allow you to tap the bell housing with a mallet you check the runout at 12-3-6-9 oclock and bump the bell housing with a mallet till you get it within .005. i tighten the bolts and then i ream the dowel pin holes to the next std size with a reamer and use CRS rod to make the new dowels. i would check first with the stock dowel pins to see if you are lucky enought to be in line. there are also offset dowels from lakewood but i have found they are a PIA to work with.

[Clem Z.]

PS

you can check the face of the bell housing where the trans mounts up against by putting the indicator on this face and turning the crang but this is tought to correct if out because it takes a machine shop to correct this.

[Clem Z.]

PS

you can check the face of the bell housing where the trans mounts up against by putting the indicator on this face and turning the crang but this is tought to correct if out because it takes a machine shop to correct this.

[John H.]

Re: PS

I've never found an (original) factory bellhousing to be out of spec, but I've used many Lakewoods on other projects, and nearly all of them required re-centering to get within .005" TIR; I use offset dowel pins made by Tavia.

[John H.]

Re: PS

I've never found an (original) factory bellhousing to be out of spec, but I've used many Lakewoods on other projects, and nearly all of them required re-centering to get within .005" TIR; I use offset dowel pins made by Tavia.

[Duke W.]

Ergo...

Just like camshafts, the factory stuff is best!

Duke

P.S. Yes I did work for GM, but that was back in the sixties, when they designed great high performance parts that were built to print and always fit.

[Duke W.]

Ergo...

Just like camshafts, the factory stuff is best!

Duke

P.S. Yes I did work for GM, but that was back in the sixties, when they designed great high performance parts that were built to print and always fit.