Forced Induction The head's off... and here's what it looks like underneath...

The head's off... and here's what it looks like underneath...

Steve and I got the head off the car last night. Here's what we found.


The piston head sitting sideways in the first cylinder. The other pistons look fine and the head gasket is undamaged. There's an exceptionally heavy amount of carbon deposits and oil on the piston head compared to the rest. I guess all the blow by oil ended up here.


The piston was completely covered in crud.


Yup, the rods are definitely a weak part here. The rest of it is probably sitting in the oil pan. Looks like the crank shaft took a beating as well.


Both intake valves are destroyed from hitting the piston. One of them is even cracked.


You can see how they're bent in this close up.


A better shot of the piston once I cleaned most of the crud off.


The underside is missing quite a bit. Glad these are getting replaced with forged pistons.


Oh, and here's a show of the holes that got blown in the side of the block. I'm so glad I had a fire extinguisher on hand.


This shot's not as clear, but you can see both holes in it.

WOW man. That's a lot of damage. So you buying a new block or going to try and rebuild this one? Is there a way to patch holes in the block itself?

I have a built up block that should be ready by next week.

man... thats pretty rough. what were the conditions when you said this blew? werent you part throttle accelerating to beat a light?

when my first one blew i short shifted into 5th at full throttle and boost shot up to just over 15psi and my afrs went in the mid 13s... and i just melted through the side of one piston and broke ringlands on three of them, the thing still ran though.

The last swap we did man that motor was looking in pretty darn good shape, had some fun that night except for the freaking rear motor mount... man that was a beyotch lol....... but back to the topic at hand :snap:

That's why I like my blower. lol I get a false sense of security with a side effect of less hp. lol

Vamp, your motor doesn't look quite as bad as mine did but looks like we both suffered similar damage.

Actually, I think I know what happened now. Back in June, I hyrdolocked the car. It ran fine once we siphoned the water out of the cylinders. I did a compression check and all the cylinders were in spec, although the first one was slightly lower than the others. Looking back, it seems like I may have bent the rod slightly at that time. Then, my catch can got clogged up and sent blowby into the intake via the crank case breather probably didn't help much. Anyway, it looks the extra stress took it's toll and the rod let go on the upstroke, sending the piston flying into the open intake valves.

Are you going with some cower rods in your new engine, or however you spell it

Lets just say I have everything you can order from MWR for our engine except for the valve springs and cams.

Wow, nice. How much $$$ for this new engine?

$3500+

Can't wait to see some HP numbers