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Author
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Topic: Help! Maybe I'm in denial...rod knock
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Calcat
Journeyman Posts: 75
From: Los Angeles, CA
Registered: Feb 2002
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posted 12-09-2002 02:03 AM
   
The 302 was purring like a kitten. Parked and went to start it up the next day. Knock knock, increases with engine rpm. I realize that it could just be coincidence but it is hard for me to accept that I start it up and this happens. Oil level and pressure was fine.
Ruled out lifters and cam, just replaced. Anything else I can look at before I get into acceptance and tear this puppy down?
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SteveLaRiviere
Administrator Posts: 34763
From: Saco, Maine
Registered: May 99
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posted 12-09-2002 08:14 AM
You hear a rod knock as the engine decelerates, it doesn't go up and down. What you describe sounds like a valvetrain problem.------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150 Be sure to remember our sponsors, Mustangs Plus, NPD, and Osborn Reproductions.
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V8 Thumper
Gearhead Posts: 3603
From: Orange, Ca. United States of America
Registered: Dec 2001
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posted 12-09-2002 08:42 AM
Ditto on the valvetrain... You say cam & lifters are new? Pull both valve covers off and check each rocker arm in firing order sequence as if you were adjusting them. Look for a loose one, note wether or not the rocker stud nut backed off or not, then post the results here  ------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html
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Calcat
Journeyman Posts: 75
From: Los Angeles, CA
Registered: Feb 2002
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posted 12-10-2002 01:30 AM
I'll go through the cycle and check all the valves. Do you think it is also possible a valve is hanging and the sound I hear is the piston pounding it closed again (ouch)?
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V8 Thumper
Gearhead Posts: 3603
From: Orange, Ca. United States of America
Registered: Dec 2001
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posted 12-10-2002 08:49 AM
Let's hope not, but first things first. Check the valvetrain, start with the simple stuff. If you can't find anything wrong up top, then we'll look further into it What cam/lifters did you just install, and did you follow the manufacturer's break-in procedure? ------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html
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