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Topic: Pure frustration (Read 2009 times) previous topic - next topic

Pure frustration

Reply #15
Too bad you couldn't post up a vid of it running. I've heard rod knock enough to be able to spot it right away.
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.

Pure frustration

Reply #16
Oh and if the sound goes away as rpms climb it shouldn't be rod knock. If it was rod knock the sound would get worse at higher rpms.
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.

Pure frustration

Reply #17
I know when we starting firing up dad's 383, there was one rocker that kept coming out of adjustment and making a terrible knocking sound.  It took several tries to get it adjusted correctly, but once it was, the sound went away.

Pure frustration

Reply #18
If I have a chance I'll try to get a vid up of it.
I'm sure the guys in Carlisle will have a good chuckle about it.

Anyway Lou, I was thinking it had to be a rod knock... it sounded all too similar to my dad's motor on his old Ram before it blew which had a rediculous rod knock in it. On the other hand, I don't hear it until the motor warms up some. From then on it's audible from around 1,000 rpms to 2,500 and then you really don't hear it anymore. The best way to describe the sound in that range would be Quint's boat when he's pushing it to the limit in Jaws... if you know what I mean.

It could be a rocker but I'm thinking of that not being the issue since it knocked before the lifter swap and after the lifter swap which required me to remove all the rockers.

This is just leading me to believe there is something amiss in the head. But despite all that, the car runs fine. I think I've done enough speculation on it, I most likely won't know for sure until I tear into it. The only thing I do know for sure is that I can cross the lifters off the list since I was advised to start there.

Pure frustration

Reply #19
Well at least it runs :D
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.