Does that piston look normal

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Apr 30, 2017 | 05:03 PM

zmorby91

Thread Starter

5th Wheeling

Joined: Nov 2016

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Does that piston look normal

Is it suppose to have a that notch missing on a 91 302

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Apr 30, 2017 | 07:12 PM

timbersteel

Logistics Pro

Joined: Mar 2005

Posts: 4,698

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From: Mexico, Missouri

Piston looks like it may be damaged.

Is this in reference to your cylinder#8 being dead?

Can you get a better look at a different angle?

Apr 30, 2017 | 07:23 PM

85e150

Super Moderator

Joined: Apr 2004

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Looks damaged to me.

Apr 30, 2017 | 07:32 PM

zmorby91

Thread Starter

5th Wheeling

Joined: Nov 2016

Posts: 25

Likes: 0

Quote:

Originally Posted by timbersteel

Piston looks like it may be damaged.

Is this in reference to your cylinder#8 being dead?

Can you get a better look at a different angle?

i got a good look at a few angles nothing super detailed tho. I have a cheap 130 dollars camera. So no 4K HD picture.

Its not liquid standing there. I pushed the end of my camera into it and pulled out and it was dry.

And yes yes this is my dead number 8 cylinder

Apr 30, 2017 | 07:39 PM

Plowboy34

Tuned

Joined: Sep 2005

Posts: 437

Likes: 4

From: SE Missouri

Definitely damaged

Apr 30, 2017 | 07:48 PM

Mudsport96

Logistics Pro

Joined: Aug 2010

Posts: 3,718

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From: Chillicothe

Seen that before. That piston is dead, and The cylinder looks wasted

Apr 30, 2017 | 08:54 PM

GoinBoarding

Cargo Master

Joined: Mar 2010

Posts: 3,342

Likes: 294

From: Laramie, WY

I'd anticipate this sort of thing.. This piston made 60psi or so dry, 90psi oiled. Misfired at idle. Detonation broke the top ring I suspect. That's what 0.120" squish will get you..

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Apr 30, 2017 | 11:47 PM

zmorby91

Thread Starter

5th Wheeling

Joined: Nov 2016

Posts: 25

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Quote:

Originally Posted by GoinBoarding

I'd anticipate this sort of thing.. This piston made 60psi or so dry, 90psi oiled. Misfired at idle. Detonation broke the top ring I suspect. That's what 0.120" squish will get you..

yea mine makes zero psi dry and not much wet. It's so funny this motor runs so nice and smooth at a idle no noise. Just super bad crankcase pressure. And while driving it looks like the motor is on fire from all the smoke blowing out the valve covers lol....

yea ive got a used motor with good comp across the board that I'm gonna be picking up next weekend.... but I'm going to tear this motor down and see how bad the damage is when I get my beater back on the road