[Guest]

hmm i know piston knock is the piston knocking against the cylinder walls but no clue about rod knock.

~Chris
San Antonio, Tx
66 coupe 289
70 fastback done by may/graduation...hopefully

 

[Guest]

I bought a 351W years ago to swap the six in my first Mustang. I dropped the engine in and it had a bad knock. I pulled it back out and went through the motor. To my dismay, it was quite a mess. After replacing the mangled cam and lifters, along with almost everything else, I discovered that one of the rods was bent. I knew something was wrong after I torqued it and the engine was really hard to turn.

http://www.geocities.com/raley65/stang18s.jpg
The G-Man's '65 K-code Fastback

 

[Guest]

It's actually where the bearing goes bad and eventually the tolerance gets bad enough that it emmits noise as the crank takes up the slack as it forces the rod up and down.

[color:blue]'68 Coupe
250/C4, 221 Argentine Head
Breakaway Converter, 9", 3.50's/T-lock</font color=blue>

 

[Guest]

You got it. Usually the result of worn bearings. There is also "piston slap", "dropped a valve", and "spun a bearing". Probably other well worn phrases the old heads can bring up.

Mustang Lovers ---- A Box-O-Choclates !!!

 

[70_Cougar]

Yes and the more sloppy the fit the louder it gets. when all the bearing material is gone then business really picks up and the end is near..... John

It would be a shame to have passed the test but to have missed the lesson.

 

[abn]

Yeah, what Inliner and the rest said.

 

[mlnielsen]

I once blew a hole thru a piston.

But that one's self-explanatory...

[color:blue]
1967 Acapulco Blue coupe
302 4V, C4, 9" 3.25:1
Torq-Thrust "D" 225-60-14
1968 PDB, Corbeau
LeCarra, Alpine in-dash CD
http://www.geocities.com/mlnielsen_67/index.htm
WEBSITE UPDATED 2/28/01
</font color=blue>