Is this weird? I think it's weird.

[decepticonmk3]

First off; I am new to supras and to rebuilding motors. With that said I am in the process of rebuilding my 7mgte.{bhg} Well today I got the head off and as it turns out, the last owner put a new head on it with ARP bolts, but didn't put a good head gasket on it. After cleaning the block and head up a bit, I noticed something..odd, at least to me and the other techs at work. #6 piston is completely differnt than the other 5.{see pics} Is this normal for a supra, or did someone do somethin dumb and put a different piston in? Here is piston #1

and here is #6

 

[IJ.]

LMAO some genius has put a GE Piston in!! :yikes:

 

[decepticonmk3]

Wow! so would the extra compression from this piston cause the head gasket to blow? I didnt get a pic of the gasket but the rubber around the edges of the gasket around the coolant passages and around the pistons was completly destroyed.

 

[IJ.]

Yes it would have detonated it's brains out if you leaned on it at all...

 

[TweeT91109]

looks like your EGR wasnt working correctly lol.

 

[decepticonmk3]

lol, Yeah I was beatin on up until it stop runnin

 

[gottadiesel]

WOW, that is all I have to say about that... and I thought Gomer Pyle had been working on mine before I bought it...

 

[IBoughtASupra]

You need to pull that piston out to avoid have to do this headgasket again.

 

[IJ.]

lol, Yeah I was beatin on up until it stop runnin

Probably NOT the best idea

Your SIG pic is way too big and outside fo the rules can you change it?
(saves me deleting it for you)

 

[decepticonmk3]

I figured as much, I just don't get why someone would do this. oh well. I thought about puttin all new piston in but I was told it would be a bad idea unless i bored it about 30 over or it would piston slap, somthing about a crosshatch? parts of the cylinder walls were smooth. guess i could just replace that one with a gte piston and be fine?

 

[IJ.]

All depends on your budget, I'm not a big fan of used pistons in another block.

 

[CyFi6]

You already have it out on a stand why don't you do a full rebuild on it with new stuff? Obviously someone else (someone stupid) was in the motor. Who knows what other stupid stuff they did.

 

[IBoughtASupra]

You already have it out on a stand why don't you do a full rebuild on it with new stuff? Obviously someone else (someone stupid) was in the motor. Who knows what other stupid stuff they did.

+1

Do a rebuild since you have it out already. You will not like it if you don't.

 

[decepticonmk3]

Who knows what other stupid stuff they did.

you should see the wiring nightmare. They used butt-crimps on almost everything. Im really good with electrical and bad wiring is a big pet peeve of mine. Anyways, I think I'll put new pistons in and have it bored out, my uncle builds drag cars and has a machine shop so I'll have him help me.

 

[7mx63]

I have my motor out to repair some issues from the machine shop, and thanks to this thread I just found out my GTE motor has 6 new GE pistons. I didn't even notice it before, until I saw this thread with a side by side comparison.

Luckily on 2k miles so far, and I had a 2.0mm cometic gasket. I only have the 2.0mm due to availability/back order issues at the time.

 

[Devin LeBlanc]

oh my god, This is the funniest thing I have seen on the forums.. What a moron!