Pulled my number 6 piston out today View attachment 951342View attachment 951343View attachment 951344because the motor was making a strange knocking sound and look what I found and haven't worked out where it came from.
Look what I found (1 Viewer)
- Thread starter donniefj55
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pics no workie
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- #3
You can't look what I found if the pictures don't work
That piston's developing THE POX!
PS. Isn't that a ball-bearing I see embedded in one of the pox holes?
PS. Isn't that a ball-bearing I see embedded in one of the pox holes?
shot peened pistons. Should be nice and strong now.
That's what I decided about mine!
Still running strong 6 years later but not so many miles later, so
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- #8
Good spotting on the bearing just don't know where it's came from we did just rebuild the carby???
- Thread starter
- #9
Good spotting on the bearing just don't know where it's came from we did just rebuild the carby???
For a time when I drag raced my 1966 GTO, I used to place thin brass screening between my carb and my manifold. I was turbocharged so the air resistance was not important (and my competition sucked so a 7-10% loss in flow was acceptable). I was worried about turbo pieces getting into the engine. Occasionally I would find all kinds of crap in there.
I was always surprised the screen caught the pieces vs. tearing.
I feel your pain BUT, at least it is a piston and not a scored cylinder or destroyed head unit from a valve bending and then screwing everything up.
Time to look for piston replacements though, and that will be hard unless you find something else that will fit as TOYO stuff is becoming unobtainium.
Best,
T
I was always surprised the screen caught the pieces vs. tearing.
I feel your pain BUT, at least it is a piston and not a scored cylinder or destroyed head unit from a valve bending and then screwing everything up.
Time to look for piston replacements though, and that will be hard unless you find something else that will fit as TOYO stuff is becoming unobtainium.
Best,
T
Kind of interesting only the two sides were holed up. Interesting.
The 1966 GTO was my all time favorite. I love that car, especially convertible.
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- #14
We stopped pretty well as soon as it started
Accelerating: ball heads toward the back of the cylinder. Braking: ball rolls forward.
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Nope, my guess; look at the shape of the chamber in the head, those are the only places tight enough to pinch the ball. They are side to side, so it would be turns, not go/stop.
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- #17
Turns yes because there has been no go and stop unfortunately
what does the head look like? any damage there?
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- #19
Surprisingly no damage to the head no scoring or anything but I've decided not to rebuild another motor as I've got a rebuilt 2h with only 21th kms so diesel pig
be sure you have the head checked for cracks - while it looks like the piston did all the giving (which is good); you don't want to put it back together and find out there were some micro-cracks
this is what happens when it pings under boost
... I thought my secondaries were too small, what really happened was there was a leak under the blower... whoops, good thing is was a one in a billion made SBC
this is what happens when it pings under boost
... I thought my secondaries were too small, what really happened was there was a leak under the blower... whoops, good thing is was a one in a billion made SBC
