Adrian_

Is there any vendor selling a gasket set for the cam towers? (M28/15 engine)

I managed to purchase a set of cam towers with cams and gears and I'll need at least the gaskets that go between the towers and the heads, plus the front and back seals. But I'd rather replace everything if a set is available.

Thank you for any hint.

hacker-pschorr

What we need is someone to produce a set of silicone gaskets for the cam towers. Eliminate the last cork gasket.......

Adrian_

You mean the back tower gasket? I was under the impression that someone is selling a silicone one.

Another question: if simply swapping complete towers, do I need anything else except for the two gaskets that go between towers and heads? (of course, provided the new towers have no leaks).

hacker-pschorr

No - the gasket between the head and cam tower.

Mrmerlin

Adrian this is going to depend on the age of the towers, the early ones have what look like figure 8 gaskets that fit to the bottoms of the lifter bores, if you use a later gasket and the early towers make sure to remove the old figure 8 gaskets otherwise these will lift the towers just enough to cause the external edges to cause a leak.
Roger@928srus.com also sells the rear cam tower sealing gaskets and they are made of silicone , dont overtighten them when they are installed

Adrian_

Thank you for the info.

You guessed right, I purchased old style (78-79) towers to gain a few hp. So, if I got it, I don't need the figure 8 gaskets, just the two bigger ones, new style?

I was under the impression that I have to buy the 8 figure gaskets AND the two big gaskets.

Adrian_

The description on 928 specialists site for Cam Tower Gasket 16V states:

Cam Tower Gasket 16V* 944.105.199.03.

*Note: 77-81, to the Following 81 Engine Types and Serial Nubmers, Requires Lifter Seals 928.105.427.01: M28.09 #0160, M28.10 #5140, M28.11 #0255, M28.12 #5222, M28.15 #0211, M28.16 #5201


My engine is M28/15 81C (or zero) 0502 and the new (lol) towers come from a 79.

Should I also purchase the figure 8 gaskets or not?

Landseer

Adrian,

It looks like the PET shows both being needed.

Part #23 is 944 195 199 03 Tower gasket
Part #24 is 928 105 427 01 Looks like the figure 8 piece you speak of?

But, looks like there is a kit:

Part #23A is A 928 105 901 00 Looks like both of the above parts, combined. Your parts guy can confirm this interpretation.


The engine number you denote is listed as one that recieves these part numbers.

I'll post a snapshot of the PET so you can see it. Be sure you get all the ancilliary O-rings and seals and replace while you are in there. Mine leaked oil extensively from part 11 (its equivialent on the 4.7 liter later moter).

edit...

Mrmerlin

regardless of what gaskets you install it would be wise to test fit the tower without the lifters add a few bolts around the edges and with a feeler gauge insert it along the edges and see if there is in fact clearance or not.
I did this job and had a good leak along the top edge of the towers, removal of the 8s gaskets cured it.

IIRC with the new Tower gasket you omit the lifter bore gaskets , the new style tower gasket has areas that the bore gaskets will hit on but dont quote me

Landseer

Stan, I have no knowledge, was just trying to help here as I don't think Adrian has access yet to the PET.

jleidel

My 80' did not require the figure 8's, but Curry's 79' Jalapeño required the figure 8's.

...just as a reference.

Mrmerlin

Well i think that part of the reason that some have bee refitted is the fact that the old style gasket may have been updated and the one in the PET thats posted may be NLA.
So mixing a new tower gasket with the old bore gaskets will cause the edges of the tower to not be fully seated, as the bore gasket even though its a thin one acts like a ridge on the newer style tower gasket and lifts the tower just enough to prevent the edges from fitting tight, hence the suggestion of using the feeler gauge to check your work

Adrian_

Thanks a lot guys for the help.

If by PET you mean the Porsche part catalogue, that can be downloaded for free from the Porsche site, so yes, I have it. I also have a 1999 hardcopy version for 924, 944 and 928 Models 1977-1988, purchased locally.

The version downloaded from the Porsche site looks exactly like the one Landseer posted, while the hardcopy version makes no refference of the figure 8 gaskets at all.


Might be what Mrmerlin said, that the new style gasket (which, by the part number, is actually a 944 one) is a bit different.

If I can order the 23A set I'll do just that, can't hurt to have all the gaskets around. Especially since I'm rather far from the part sources. If not, I'll order the new style gaskets and scrap the figure 8 ones.

GlenL

Any speculation on what the "8" gaskets are supposed to accomplish?

I had them on my early '80 and left them off during rebuilds as I can't see the purpose.

RicerSchnitzzle

Is it the tower or the head that matters? I don't see how they will mate up with anything on a later head.