Fresh engine, used cam. A couple of questions - Team Camaro Tech
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post #1 of 9 (permalink) Old Oct 25th, 05, 06:59 AM Thread Starter
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Question Fresh engine, used cam. A couple of questions

Does a fresh rebuilt engine with an already broke in cam still have to go thru the same start up as it does with a brand new cam? You know, the 2000 rpm for 20 minutes deal.

On a fresh built to specs .030 over DZ engine..what is recommended for head gaskets? or complete gasket set. The block IS NOT decked if you need to know that.


Thanks

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post #2 of 9 (permalink) Old Oct 25th, 05, 08:14 AM
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Cool Re: Fresh engine, used cam. A couple of questions

Why would you install a used cam/lifter set in a new engine? The camshaft/lifters are the fastest wearing parts in a SB Chevy engine.

So lets say you do install this stuff: The lifters need to go back on the same lobes they were mated to in the previous engine. You should not need to break in the cam as usual at 2000-2500 RPM for 20 minutes.

On SBC's with iron heads and stock blocks I like to use the stock replacement FelPro Perma Torque head gaskets. They work very well and are resonable in price. Do not use cheap gaskets.

Good Luck!

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post #3 of 9 (permalink) Old Oct 25th, 05, 11:14 AM
 
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Smile Re: Fresh engine, used cam. A couple of questions

High performance stock engines used the cheap, .020" thick steel shim headgaskets for years so go figure.

And some engines even had two stacked on them to lower the CR. before they worried all that much about quench and our now poor gas!

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post #4 of 9 (permalink) Old Oct 25th, 05, 05:24 PM
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Re: Fresh engine, used cam. A couple of questions

If you're using new lifters on used cam, then you need break-in.

If you re-using the old lifters, then they BETTER be on the same lobes as before. As long as they are, then no break-in necessary. If they aren't in the same bores as before then you will probably ruin cam.

If it's a roller cam, then it makes no difference at all.

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post #5 of 9 (permalink) Old Oct 25th, 05, 06:37 PM
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Re: Fresh engine, used cam. A couple of questions

Cam and lifters are only $100 for the Crane blueprint 30-30. Whay take a chance? Jerry MacNeish told me to use the GM .028 composition gasket sold in the GM performance catalogue. They are available in stock at most chevy dealers. I can provide the number if need be.

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post #6 of 9 (permalink) Old Oct 25th, 05, 07:16 PM
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Re: Fresh engine, used cam. A couple of questions

Gary,, I sent you a pm but will not go thru,, says you got too many in your box that has not been cleared...

Don
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post #7 of 9 (permalink) Old Oct 25th, 05, 08:42 PM
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Re: Fresh engine, used cam. A couple of questions

Quote:
Originally Posted by zdld17
Gary,, I sent you a pm but will not go thru,, says you got too many in your box that has not been cleared...
It's clear now. Thanks.

"Government is not reason; it is not eloquent; it is force. Like fire, it is a dangerous servant and a fearful master." ..... George Washington

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post #8 of 9 (permalink) Old Oct 26th, 05, 06:42 AM Thread Starter
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Exclamation Re: Fresh engine, used cam. A couple of questions

The cam [30-30] and lifters are brand new, and just broke-in with approx. 500 miles. Is currently in a .030 350 built with all the external parts from my 302. Runs great with no problems. As soon as I can get my Z to pass Delaware emissions curb idle test my 302 is going in. And NO i haven't got it to pass yet.

I really don't think I'll be using CHEAP gaskets...which is the reason why I asked that question...what is recommended?


Gary L...do you know if I can get those gaskets in a complete gasket set from GM?


I know about the lifters having to go on the same lobes. I have installed used cam and lifters before with engines already broke-in with NO problems, but never a "fresh [broke-in]" cam and lifters in a fresh engine. That's why I asked that question.

Why would the cam get ruined if the lifters aren't going in the same bore?

Thanks

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post #9 of 9 (permalink) Old Oct 26th, 05, 01:55 PM
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Re: Fresh engine, used cam. A couple of questions

I am not sure if they are available in a set. The cam lobes "mate" to a specific lifter during break-in time.

"Government is not reason; it is not eloquent; it is force. Like fire, it is a dangerous servant and a fearful master." ..... George Washington

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