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Old 04-15-2005, 02:19 AM   #1
pjmoreland
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Looking for camshaft recommendations

Several lobes on my camshaft are severely worn. I'd like to replace the camshaft with one that is pretty much stock and will hold up ok. Any recommendations? I don't want to spend a lot of money.

For anybody who is interested in knowing how I got to this point, check out this previous thread:

http://67-72chevytrucks.com/vboard/s....php3?t=150486

The exhaust lobe for cylinder 4 is pretty much totally gone. The exhaust lobe for cylinder 8 is about half way gone. My guess is that the head gasket blew partially between cylinders 4 and 6 because the exhaust valve in cylinder 4 wasn't opening. That allowed coolant to start leaking into cylinder 6, causing the valve to crack, causing the low compression in cylinder 6. Not sure why the exhaust valve in cylinder 8 cracked.

Here's a picture showing the absense of a lobe for the cylinder 4 exhaust valve and a picture of my timing chain that definitely needs to be replaced:
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Old 04-15-2005, 09:20 AM   #2
midyearvet@aol.
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You better check the lower end & the oil pump also.
When my cam went flat it wiped out the oil pump from the metal shavings & damaged the bearings, Also scored the cylinder wall on the cylinder adjacent to the bad lobe.
Rick Ca.
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Old 04-15-2005, 09:34 AM   #3
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I'm going to be pulling the oil pan off the rest of the way, so I'll pull of one or two of the main bearings off and take a look. There isn't any obvious scoring on the cylinder walls, but I'll take a closer look. The metal had to have gone somewhere. Hopefully by some miracle it ended up in the oil filter. This would probably be a good time to put a high pressure oil pump in.
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Old 04-17-2005, 02:43 AM   #4
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No need for a high press oil pump, though I like Melling's improved oil pump in the 10% version. Great design features.

Look at the DD2000 numbers for this mild, yet above stock, cam. I think one of the Voodoo cams might be a bit better because it has an ever so slightly longer duration intake valve opening with a touch more lift.
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Old 04-17-2005, 01:29 PM   #5
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Thanks for the recommendation. I'll look into the Voodoo cams.
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Old 04-19-2005, 12:54 AM   #6
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Which Cam

Here's an article to read
VV

http://hotrod.com/techarticles/113_0209_cam/
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Old 04-19-2005, 01:34 AM   #7
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Interesting article. Thanks.
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Old 04-24-2005, 01:30 AM   #8
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Well after replacing the camshaft, lifters and heads, it's back up and running. The coughing through the carb is definitely gone. The engine has way more power now and runs much better. This ended up costing me about $250 and took about 20 hours of my time. I guess it could have been worse.
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Old 04-24-2005, 01:31 AM   #9
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Oh, yeah, and a new timing chain set.
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