porsche 962 head-cylinder

[bobby_germany]

Hi,
does anybody know the price of a single 962 head-cylinder ?

[WERK I]

I believe the 962 cylinder heads(water cooled) are bank based and can not be separated.
See attached thread.
Rebuilding a 962 motor

[bobby_germany]

o.k. but nobody will buy the complete bank if he have only one broken head. There must be an interest for single parts, because it's no problem to use a single one when the size is o.k.

[bobby_germany]

Sorry, what did you mean with 'bank based' (head+cylinder=one part, that's clear) or that you can only buy the cyl. 1-3 or 4-6 ?

[WERK I]

bobby,
I meant to say cylinders 1 through 3 has a single head and cylinders 4 through 6 has a single head. Once you start getting into water cooled engines, most consider the left or the right side as a single unit since the units are cast as one piece. The cylinders are probably press fit into the heads.

[bobby_germany]

sorry, but that's not right. The 962 Engine has single heads. The are together with the cylinder(water cooled) as one part. They are laser-welded. And I would like to know the price for such a cylinder-head-unit.

[Carrera3.5L]

Bobby,

I don't know where much of the information above was sourced from, but here is the part number for a 95mm head/cylinder:

935 104 020 02

I have no idea what a single used unit may sell for, but here in the USA we have two good sources for new units (albeit not inexpensive): Eric Bloss from Porsche Motorsport and Neil Harvey from Performance Developments.

Neil makes his own and considers them an "upgrade" over the Porsche part. He can be reached at http://www.performancedevelopments.com and he may have some "take-offs" that are in good condition. It's worth a fax or email.

Eric probably has plenty of used units laying around, so he may be a good source for a used unit as well if you can't find one in Germany. He can be reached at http://content3.eu.porsche.com/prod/motorsport/sales.nsf/usaenglish/pmna_business_infopmna_personell_prjectm

BTW, his hairline has receded further.

Ralph

[WERK I]

Oops! Sorry.
Looking at the pics from helidoc, they look one piece.

[bobby_germany]

ok, what is then this for a head-cylinder-unit ?

[Wayne 962]

I have one of the single units on my desk here at work = very cool. I think that the single one may be a 956 unit and the bank of three a late-model 962 unit? They are very similar...

-Wayne

[Carrera3.5L]

Originally posted by Wayne at Pelican Parts
I have one of the single units on my desk here at work = very cool. I think that the single one may be a 956 unit and the bank of three a late-model 962 unit? They are very similar...

-Wayne

ALL of the 956/962 air/water and water/water motors have one piece cylinders/heads where the cylinder and head are welded together.

An exception is the 959, which has a head gasket between the head and cylinder.

Hopefully this puts any confusion above to rest.

Ralph

[helidoc]

I think that the head pictured in this post might be an earlier version of the water cooled head only engine. Porsche supposedly made 2 water cooled engines for the 962, the earlier version I think only the head was H2O cooled and in the later versions like mine both the head and cylinder walls were cooled. If I am not mistaken, I think the 956 was an air cooled motor. I think the later head sections are "cold welded" together and can be bought as separate cylinders. I have been told figures in the $9000+ range if you can find one.

[bobby_germany]

Hi,
that are really good news for me. Thank you for the information. I've got one of these cylinder-head-units. Do you know some people who are interested in such a unit ?

[ischmitz]

Originally posted by bobby_germany
Hi,
does anybody know the price of a single 962 head-cylinder ?

so what you really wanted to ask is: what is a single 962 head-cylinder unit worth because I have one for sale....

[bobby_germany]

that's what I really want to know !!!!!!!!!!!!

[BURN-BROS]

Doc, weren't the 956 a 4 valve motor? If so watercooled heads were mandatory.

Ralph,

What is in question is individual heads versus 1 head for the whole bank. Do you have any info on that?


Bobby, find me some rods for that 956 will ya?

[Carrera3.5L]

Boy, this thread sure has gotten confusing! I thought that I was clear in my previous comments but I guess not. I will try to simplify and better explain myself

The 956 used a 2.8L 4-cam, 4-valve, twin-turbo motor that was mechanically injected using Kugelfischer injection. It had air-cooled cylinders and water-cooled heads. This motor never ran in IMSA but was used in Group C in Europe. You can consider this motor a precursor to the later 962C motor or an evolution of the earlier 935 motor, whichever floats your boat.

The 962 that was raced in IMSA in the mid/late '80's was a completely air-cooled, flat-fan, twin-plug, LARGE single-turbo motor that is what all of our air-cooled motors aspire to be when they grow up (well, mine at least ) This motor was built in 3.0L and 3.2L displacements and used Motronic injection (albeit much more advanced than the street car version).

The 962C from the late '80's/early 90's was the final engine version and was also built in either 3.0L or 3.2L displacement. I guess you could consider this an evolution of the earlier 956 motor. It was similar to the 956 engine, in that it was a 4-cam, 4-valve, twin-turbo motor BUT a couple of obvious differences were that it had water-cooled cylinders and heads and used a further updated version of Motronic.

Whether it be a 956 or 962C motor, the cylinders/heads were all 1-piece units and were removed/installed individually. There was never a "single" head for one bank. I suppose it may appear that way to some when the water jackets are fitted on the motor, but when the water jackets are removed the cylinders/heads do come off individually. Helidoc just did this, he should be able to confirm.

Is that a bit more clear or did I further confuse people?

Ralph

EDIT: The very first 962 air-cooled IMSA engines were single plug and had not yet been twin-plugged, not important in this discussion but something to mention before someone calls me out on it.

[BURN-BROS]

Thanks Ralph, that set me right. Cheers!

[emcon5]

Originally posted by bobby_germany
ok, what is then this for a head-cylinder-unit ?

What Bobby asked.

[Carrera3.5L]

Sorry, sometimes I just assume that people see what I see. To answer the question above, the cylinder/head pictured is a water/water unit from a 962C engine.

If it were an air/water 956 unit, the cylinder would have cooling fins similar to what our air-cooled 911 motors have.

The "bare" cylinder without fins is a dead giveaway for a water/water piece.

Ralph