Rebuilding a 67 427-435

[Patrick B.]

I haven't done an engine rebuild project for over 10 years and I'm discovering that some of my standard parts and sources (e.g. Victor gaskets, Performance Automotive Warehouse) no longer exist.

I have a few questions for those with fresher experience. I have a NOS aluminum/nylon cam timing gear, but I am concerned that a 20 year old nylon part may not hold up. If I use a Cloyes Tru-roller set, will be there be a compatability problem with an iron or steel cam gear runnimg against the iron block. Are shims necessary? I do not want to machine the block for a needle thrust bearing.

Are the regular 8081 Felpro composition head gaskets OK with Aluminum heads, just in case I can't resist using some 392 heads in place of the original 391 heads?

Will the one piece oil pan gaskets work with the 1967 timing chain cover and oil pan?

[Clem Z.]

Re: Rebuilding a 67 427-435

I haven't done an engine rebuild project for over 10 years and I'm discovering that some of my standard parts and sources (e.g. Victor gaskets, Performance Automotive Warehouse) no longer exist.

I have a few questions for those with fresher experience. I have a NOS aluminum/nylon cam timing gear, but I am concerned that a 20 year old nylon part may not hold up. If I use a Cloyes Tru-roller set, will be there be a compatability problem with an iron or steel cam gear runnimg against the iron block. Are shims necessary? I do not want to machine the block for a needle thrust bearing.

Are the regular 8081 Felpro composition head gaskets OK with Aluminum heads, just in case I can't resist using some 392 heads in place of the original 391 heads?

Will the one piece oil pan gaskets work with the 1967 timing chain cover and oil pan?

cloyes sells a timing gear with a bronze thrust washer that i would use. for some reason BBC have a tendency to have the cam gear eat into the block. if you already have a timing gear set just machine the back of the cam gear to use the bronze thrust washer.

[Russ S.]

Re: Rebuilding a 67 427-435

I would never use that nylon gear. It was junk when they were new.

[Clem Z.]

Re: Rebuilding a 67 427-435

when i ran into a block that was worn in the cam gear thrust area i use a shell mill bolted on the end of a old camshaft to reface the area. i powered this set up using a electric drill motor. http://www1.mscdirect.com/cgi/NNSRIT...-SearchResults then i used a bronze thrust washer to make up for the lost material i machined away

[Patrick B.]

Re: Rebuilding a 67 427-435

Thanks Clem. The block has no wear now in the cam thrust area because the stock gear prevents wear, but I will look for the Cloyes gear set up with the bronze washer. Does the washer fit close around the cam, or does it require a cam button to keep it captured in a groove on the back of the gear?

Also what you think about the one piece oil pan gaskets?

[Clem Z.]

Re: Rebuilding a 67 427-435

Thanks Clem. The block has no wear now in the cam thrust area because the stock gear prevents wear, but I will look for the Cloyes gear set up with the bronze washer. Does the washer fit close around the cam, or does it require a cam button to keep it captured in a groove on the back of the gear?

Also what you think about the one piece oil pan gaskets?

you had better check with cloyes as i don't remember for sure. i know they had several types some needed the gear machined to locate the thrust washer and some did not. i have not done any of this work for better than 15 years so i am sure things have changed

[Dick W.]

Re: Rebuilding a 67 427-435

Patrick keep in mind that Clem worked in a Chevy dealership, as the chief engine builder, when the First Chevy V-8 was introduced, not the 265.

[Domenic T.]

Re: Rebuilding a 67 427-435

when i ran into a block that was worn in the cam gear thrust area i use a shell mill bolted on the end of a old camshaft to reface the area. i powered this set up using a electric drill motor. http://www1.mscdirect.com/cgi/NNSRIT...-SearchResults then i used a bronze thrust washer to make up for the lost material i machined away

Clem is right about the wear, I had the same on my BB and it would not fit for obvious reasons on my mill.

Clem,
we also used a cam to indicate the cut. I used a hard steel spacer/ washer back then. Had to cut .060 to clean it up.

DOM

[Patrick B.]

Re: Rebuilding a 67 427-435

Dom:

Did the wear occur with a cam gear while using the steel shim or was the steel shim used to make up for the wear from a steel gear on the iron block. Did the steel shim prevent further wear? Was it necessary to bond the shim to the block for it to protect the block?

[Clem Z.]

Re: Rebuilding a 67 427-435

Dom:

Did the wear occur with a cam gear while using the steel shim or was the steel shim used to make up for the wear from a steel gear on the iron block. Did the steel shim prevent further wear? Was it necessary to bond the shim to the block for it to protect the block?

i have seen more block wear from a aluminum gear than from a steel gear on the cast iron block.

[Joe L.]

Re: Rebuilding a 67 427-435

Thanks Clem. The block has no wear now in the cam thrust area because the stock gear prevents wear, but I will look for the Cloyes gear set up with the bronze washer. Does the washer fit close around the cam, or does it require a cam button to keep it captured in a groove on the back of the gear?

Also what you think about the one piece oil pan gaskets?

Patrick-----


You can use a Cloyes Tru-Roller set #9-3110T. This set includes a captured needle bearing and the camshaft sprocket is machined to accommodate the needle bearing with no machining of the block necessary. If you wish, you can order the 9-3110T set and also order a 9-220B bronze wear plate. This plate will replace the needle bearing (for those who would rather use the wear plate than the needle bearing). No block machining is required.

You can and should use a 1 piece oil pan gasket. These are available from several gasket manufacturers.

For head gaskets, if you decide to use aluminum heads, then I would recommend using Fel-Pro #1027. These are expensive but that's what I would use with the aluminum heads and an iron block. Otherwise, if you use cast iron heads, you can use the Fel Pro 8081.

[Patrick B.]

Re: Rebuilding a 67 427-435

i have seen more block wear from a aluminum gear than from a steel gear on the cast iron block.

Thanks Clem,

I never seen wear from an aluminum gear on any block that I have taken apart, but I have had blocks that came to me bare that had wear on the cam gear thrust area. I always wondered if that was just the result of a steel gear or if a roller cam was involved. Your experience is reassuring.

[Patrick B.]

Re: Rebuilding a 67 427-435

Patrick-----


You can use a Cloyes Tru-Roller set #9-3110T. This set includes a captured needle bearing and the camshaft sprocket is machined to accommodate the needle bearing with no machining of the block necessary. If you wish, you can order the 9-3110T set and also order a 9-220B bronze wear plate. This plate will replace the needle bearing (for those who would rather use the wear plate than the needle bearing). No block machining is required.

You can and should use a 1 piece oil pan gasket. These are available from several gasket manufacturers.

For head gaskets, if you decide to use aluminum heads, then I would recommend using Fel-Pro #1027. These are expensive but that's what I would use with the aluminum heads and an iron block. Otherwise, if you use cast iron heads, you can use the Fel Pro 8081.

Thanks Joe,
Is it necessary to use a cam button with this Cloyes timing set or is the wear plate secured tightly enough in the gear to prevent it coming off and getting ugly?

[Clem Z.]

Re: Rebuilding a 67 427-435

Thanks Joe,
Is it necessary to use a cam button with this Cloyes timing set or is the wear plate secured tightly enough in the gear to prevent it coming off and getting ugly?

with a correctly ground cam lobes the thrust on the cam is always to the rear of the engine. this is why the cam gear will wear the block. to make sure you get plenty of oil to the the block/cam gear interface drill a .062 hole in the block into the oil gallery. this will also help oil the chain from the excess oil thrown off of the gear

[Joe L.]

Re: Rebuilding a 67 427-435

Thanks Joe,
Is it necessary to use a cam button with this Cloyes timing set or is the wear plate secured tightly enough in the gear to prevent it coming off and getting ugly?

Patrick------

The plate is not secured tightly to the sprocket. However, it should not dislocate. A flat tappet cam will produce INWARD thrust (that's why wear is sometimes seen on the block) so there is really no opportunity for the wear plate to dislocate. If the possibility of wear plate dislocation concerns you, though, you can always add a thrust button.