Be careful putting these engines together

[pittsburghracer]

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

 

[dadsbee]

When love comes knocking at your door.....

 

[408 swinger]

 

[33IMP]

Assembled in Chinatown, by Ho Lee Krap.

 

[Heywodja]

Kinda like this?

 

[harrisonm]

Wouldn't one think that would kind of stick out????
I have made a LOT of dumb mistakes, but I don't think I would have overlooked that!

 

[Demonic]

Did the valve bend?

 

[junkyardhero]

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.

 

[360duster]

what a dumb mistake, the one who built it must be pretty ignorant....is the rod also in wrong?

Michael

 

[RustyRatRod]

Nice.

 

[Sterling]

I just disassembled one similar to that, he wasn’t so lucky. The person who assembled the engine put #3 piston in #4 hole, and #4 piston in #3 hole. They had the connecting rods on correct. Didn’t make 1 run down the 1/4 mile, snapped both intake valves off. Heads are out trying to get fixed now

 

[Charrlie_S]

One of my early 170 slant six builds. After 2 years of racing, took the engine apart and had valve marks just like that. 12 of them. It's called positive valve closing

 

[360duster]

like a ducati? Desmodromic Valve train

 

[Syleng1]

I heard turning a piston upside down was actually a speed secret. Lol! It will be lucky that is all the damage it caused. Very lucky.

 

[Plymouth 65]

Assembled by Sum Ting Wong! 65'

 

[toolmanmike]

The assemblers name was't Joe Obvious for sure. He must be the guy that asked which way to turn the screw to lower his idle.

 

[ProjectBazza]

I heard turning a piston upside down was actually a speed secret. Lol! It will be lucky that is all the damage it caused. Very lucky.

Don't go there!

 

[318willrun]

you may not be done finding the surprises..... slowly, carefully, examine everything now.....

 

[Charrlie_S]

Don't go there!

My Z/SA 170 slant six picked up 20 horsepower by installing the pistons backwards.

 

[33IMP]

Did the valve bend?

If ALL he got out of this fiasco is a bent valve, he should go buy lottery tickets, immediately.

 

[toolmanmike]

My Z/SA 170 slant six picked up 20 horsepower by installing the pistons backwards.

View attachment 1716151817

So you doubled the horsepower?

 

[AJ/FormS]

20hp; that's a lotta bang for the buck, lol.

 

[pittsburghracer]

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

View attachment 1716151704

View attachment 1716151705

Facebook is great for seeing stuff like this.

 

[Charrlie_S]

So you doubled the horsepower?

Trippled

 

[Dfr360cuda]

Isn’t flipping the pistons an Uncle Tony trick ?
Flipping all 8.