Sami951

Ok, I finally got around to re-building the engine after HG failure, which happened during some serious high-speed driving on the german autobahn in May ... It's 3 am over here so there's not going to be much comments, just wanted to show you guys some progress before I head off to bed

Thursday:




Friday:

Sami951

Saturday:

Sami951

Saturday cont'd:









And that's pretty much where we left it. With any luck it'll be all done and in the engine bay tomorrow evening

special tool

I like to see that wrap on header/xover - VERY, VERY important on 951.

Looks good.

theedge

What are you welding there? Making good progress!

David Floyd

Nice garage !

Sami951

Heheh, I figured somebody would catch that welding picture soon enough

The bearing at the rear end of the crank didn't want to come off, so my friend just welded a bolt on it and pulled it out ... quite ghetto but it worked pretty well. I don't know if that bearing is usually replaced or not, but we figured why not ...

pete95zhn

It's the "assistants" ( = ie. the main mechanic's ) employer's warehouse. ;)

pete95zhn

Sami was trying to catch me and Sybelix while we were doing about 280km/h...the HG blew at a speed of ~240 spreading a significant cloud of smoke. A fried of our driving behind Sami was pretty suprised about this James Bond -style smoke screen.
I had to tow Sami for the last 60 kms to the car ferry which took us back to Finland across the Baltic Sea.

Pauerman

Sami,

Which head gasket is that?

It's interesting to see that the coolant holes on the face of your gasket are spread out along the bottom and top of every cylinder vs the coolant passages being mainly located on the rearward/end side of a standard WF gasket. It's no wonder that head gasket failures are common at the #4 cylinder - all the hot coolant is funneled to one main area. Your gasket seems like a much smarter design - I need something like that.

Cool pics man - thanks for sharing.

Vic

z3bra

Just get a set of hollow core punches from Harbor freight for 6 bucks and you can have them in any head gasket that's missing them. I think the main thing you want to do is progressively enlarge them as you move from front to back. Otherwise you'll have too much flowing at the front of the engine and not enough coolant flow toward #4. The Victor-Reinz Widefire I just put on had a couple smallish ones by #1 on the exhaust/bottom side that were ~ 3/16 or so. Nothing on #2 and #3, and then the full open ones on #4. You'd probably be helping a little without going overboard to duplicate the holes by #1 on #2 and #3. I was debating it but chickened out and just installed it.

David Floyd

Looks like a Cometic MLS to me

Ian Carr

BE AWARE! I got the MLS Cometic head gasket and there must be different torque spec or some thing. We have a refinished head and block and the gasket leaked in the rear of the head. I had to go and get a radiator stop leak that was actually designed to repair head gaskets and the leak finally stopped. Hope you have more luck.

-Ian

Sami951

It's the cometic head gasket, installed dry & clean, with raceware studs. At first we set the torque to 20nm + 90 deg. + 90 deg., but then I got paranoid since the paper that came with the studs said 65lbft / 90 nm ... so we tightened them just a bit more to get everything to 90 nm. I hope it works out ...

dime1622

is that a SPEC pressure plate? what clutch are you installing?