Be careful putting these engines together

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This guy's shop....I can't even explain this pattern!

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Dfr360cuda said:
Isn’t flipping the pistons an Uncle Tony trick ?
Flipping all 8.
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We did that flat top 340 pistons with floating pins and 4 valve reliefs. It cut down on piston slap noise.
 
I made this mistake before. I didn't know about it until I installed a bigger cam and my new heads. People make mistakes. Even us white dudes.
 
I have a 408 that someone else built that I took in on trade with a rod knock. Used standard width bearings on journals with filets.
 
33IMP said:
My guess? Broken rod or piston pin, piston slides up to the head and rotates every time the intake valve hits it, ..... until the engine quits.
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I have seen that before. Typically as mentioned. Usually it breaks the piston before it makes a full circle though. I am curious as to what was found there.
 
pittsburghracer said:
Guy brought this to me, new engine build, said high rpms there was a tapping sound, it ran great, no misses, ran it up to 4500 rpms and the tapping started. Checked all the top end, and was solid. Pulled the heads and behold, a piston was installed in the wrong direction, lucky he ran 450 lift cam,. Actually he ran Harlan sharp 1:6 rockers, which in turn made them 470 lift

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When I see something like this, I think it was done intentionally.
 
pittsburghracer said:
Sorry to say I disagree with you. Some guys are very capable of this.
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We had a Member selling "fresh rebuilds" here that posted a 440 I believe with them upside down, and the intake/exhaust notches on the wrong sides, :wtf:
 
Several years ago, a younger guy I know built a nice Edelbrock headed 408. He had the heads ported, a good solid flat tappet cam, good crank and rods. He installed every piston upside down. The engine fired right up and immediately bent a bunch of pushrods and valves. I had offered to help or even build it for him, and he declined any help. Some lessons are hard learned and not soon forgotten.
 
I can’t tell you how many times guys have spotted issues from pictures posted on Facebook. Saving those guys 1000’s of dollars. Facebook sucks lol
 
pittsburghracer said:
Guy brought this to me, new engine build, said high rpms there was a tapping sound, it ran great, no misses, ran it up to 4500 rpms and the tapping started. Checked all the top end, and was solid. Pulled the heads and behold, a piston was installed in the wrong direction, lucky he ran 450 lift cam,. Actually he ran Harlan sharp 1:6 rockers, which in turn made them 470 lift

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Should purchase a lottery ticket.
 
junkyardhero said:
woof. that's down right malarky.

i had a builder put the #2 & 4 pistons in with the valve reliefs switched and hung a valve, so yeah, i can see that but this? how in the ever loving ****. i'd absolutely love to hear the excuse on this one.
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But he was just doing what UTG [uncle tony] says to do LOL
 
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