Cam Swap In Car ? - Team Camaro Tech
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post #1 of 10 (permalink) Old Nov 19th, 05, 04:02 AM Thread Starter
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Cam Swap In Car ?

Can anyone tell me if an in car cam change is possible in a 69 Camaro ?

Is there enough room to get the cam out after removing the radiator, condensor, and grill ?
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post #2 of 10 (permalink) Old Nov 19th, 05, 04:14 AM
 
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Re: Cam Swap In Car ?

yes
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post #3 of 10 (permalink) Old Nov 19th, 05, 06:38 AM Thread Starter
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Re: Cam Swap In Car ?

Thanks.

Is it a pain ? (have to jack the motor up or anything ?)
Or is it a easy path out the front ?
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post #4 of 10 (permalink) Old Nov 19th, 05, 01:12 PM
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Re: Cam Swap In Car ?

You mey have to remove the hood latch and brace but no jacking the motor.

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post #5 of 10 (permalink) Old Nov 19th, 05, 02:08 PM
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Re: Cam Swap In Car ?

I am assuming you have a small block V-8. To remove the timing cover you should drop the oil pan first. If you just pull the timing cover off without dropping the pan you will bend the timing cover where it seals to the pan and will most likely have an oil leak after you put it back together.

Because itís such a pain to change the oil pan gasket with the engine in the car I would pull the engine to change the cam.

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post #6 of 10 (permalink) Old Nov 19th, 05, 04:10 PM Thread Starter
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Re: Cam Swap In Car ?

Quote:
Originally Posted by Farm Boy
I am assuming you have a small block V-8. To remove the timing cover you should drop the oil pan first. If you just pull the timing cover off without dropping the pan you will bend the timing cover where it seals to the pan and will most likely have an oil leak after you put it back together.

Because itís such a pain to change the oil pan gasket with the engine in the car I would pull the engine to change the cam.
I thought there was a trick where you trimmed the edge of the cover to avoid that. Am I remembering wrong ? (It's been 20 years !)
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post #7 of 10 (permalink) Old Nov 19th, 05, 05:29 PM
 
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Re: Cam Swap In Car ?

i changed the cam in my 68 twice without pulling the motor or droping the pan. no leaks nothing bent.
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post #8 of 10 (permalink) Old Nov 19th, 05, 06:42 PM
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Re: Cam Swap In Car ?

Quote:
Originally Posted by markr
I thought there was a trick where you trimmed the edge of the cover to avoid that. Am I remembering wrong ? (It's been 20 years !)
When you pull off the timing cover without first removing the oil pan you will bend the steel retainer welded to the cover that holds the rubber seal. The retainer will bend at the top (the part that is next to the block). You can trim off this bent part with tin snips and reinstall the cover without removing the pan. This method was used extensively by mechanics to replace the aluminum and nylon timing sprockets in these cars. These sprockets would rarely go 100,000 miles and it was a common repair.

Nevertheless I do not like this method and would never use it on my Camaro.

Steve

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post #9 of 10 (permalink) Old Nov 20th, 05, 05:54 AM
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Re: Cam Swap In Car ?

IF you use the trimming trick on the timing cover, be sure and use plenty of good sealant. I have done this a few times with engine in car. It's a pain, but if you clean the area around bottom of timing cover and use plenty of high-quality sealant, then it shouldn't leak.

The rest of the job is fairly routine. Too bad Chevy just didn't use flat seal around whole timing cover. It woulda made in-car cam changes soooooo much easier.

Dave F. in Rhode Island
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Bought my first big-block Chevy in 1970
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post #10 of 10 (permalink) Old Nov 20th, 05, 09:44 AM
 
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Re: Cam Swap In Car ?

There is a trick to doing this without bending the timing cover. If you first drain the oil. Then remove the front 4 bolts in the oil pan completely. Then work your way back to about 2/3 way of the engine loosening them less as you go farther back. The idea is to let the front end of the pan lower/hang down. Then you can attempt to ease out the timing cover. Start with the top tilting it foward and it should only have a slight snug spot as it pulls the gasket material loose at the bottom. If it does not seem to be coming out you may have to loosen the pan bolts slightly more and try again. I have removed them many times with no bending of the timing cover this way. Going back in with the cover does require some patience. It is easier if you trim about 1/8" off the top edge of the gasket retaining lip. If done with a highspeed or equivelant it can be made to apear stock. I am not a big fan of large amounts of sealant, it can make for stopped up oil passages if it gets loose inside the engine, and it looks awful on the outside so be cautious when applying the sealer. You should only apply sealant in the corner areas using slightly more than you would if you had the oil pan off. When replacing the cover go in the reverse order putting the bottom in first. Be careful not to push down against the pan but just enough to let the gasket in under the block. This works much easier if the original rubber gasket is reused as it has already been compressed to conform to the pan. A new gasket can be used its just a tighter fit when going back. Also dont forget to check the crank seal while you have the cover out they often will be hard and possibly broke they are cheap to buy. Hope this helps
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