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#1
01-15-2005, 03:11 PM
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Well I went to break in the cam today and try to locate the exhaust leak. Turns out the leak was the exhaust crossover leaking. I need to yank the intake and replace the gasket there. Is there a prefered gasket for these old 400's or just the standard felpro stuff?
Thanks, -harry
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Sold - 1967 Grand Prix Convertible ( http://forums.performanceyears.com/f...d.php?t=639110 ) 2003 Bonneville coupe (hers) 2007 Avalanche LTZ 4x4 |
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#2
01-15-2005, 03:11 PM
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Well I went to break in the cam today and try to locate the exhaust leak. Turns out the leak was the exhaust crossover leaking. I need to yank the intake and replace the gasket there. Is there a prefered gasket for these old 400's or just the standard felpro stuff?
Thanks, -harry
__________________
Sold - 1967 Grand Prix Convertible ( http://forums.performanceyears.com/f...d.php?t=639110 ) 2003 Bonneville coupe (hers) 2007 Avalanche LTZ 4x4 |
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#3
01-15-2005, 06:06 PM
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Harry, I always use the Felpro gasket and never have had a problem. Pat
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#4
01-23-2005, 11:58 PM
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OK OK. I thought I knew a little about cars but--- How and Why do you break in a cam???
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#5
01-24-2005, 06:26 AM
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To break in a cam you run the car at 2000 RPM with no load on it for 15 minutes or until the engine comes up to temp, whichever takes longer. Then drain and replace the oil and filter.
Missed the why part. The reason is to allow the lifters to "seat" against the cam. I cannot give you the mechanics of why you use 2000 RPM, but it is the speed I was taught. Seating the lifters to the cam is important to prolong cam life and is one of the reasons you never switch lifters from one hole to the next or reuse lifters with a cam change. Hope this helps, -harry
__________________
Sold - 1967 Grand Prix Convertible ( http://forums.performanceyears.com/f...d.php?t=639110 ) 2003 Bonneville coupe (hers) 2007 Avalanche LTZ 4x4 |
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#6
01-24-2005, 06:42 AM
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Ed,
Just found this link to the Crane Cam web site. Gives a good explaination of the How and Why. Crane Web Site -harry
__________________
Sold - 1967 Grand Prix Convertible ( http://forums.performanceyears.com/f...d.php?t=639110 ) 2003 Bonneville coupe (hers) 2007 Avalanche LTZ 4x4 |
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#7
01-24-2005, 08:53 AM
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Make sure you get the right intake gasket for the year of the heads you're using.
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#8
01-24-2005, 10:00 AM
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John,
That turned out to be the problem, they used the wrong gaskets. Correct, new ones are in and the motor runs like a top. -harry
__________________
Sold - 1967 Grand Prix Convertible ( http://forums.performanceyears.com/f...d.php?t=639110 ) 2003 Bonneville coupe (hers) 2007 Avalanche LTZ 4x4 |
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