PorKen

Anyone used the '87- type instead?



'85 (2) 928 110 566 01

Early '86 (2) 928 110 566 04

Late '86 (4) 928 110 568 00

'87-'95 (2) 928 110 580 02

Lizard928

this is something I have been wanting to look at myself, I see NO reason that an 87+ paper gasket would not work, and those steel /rubber ones are DAMN pricey.

I plan on ordering a couple up reasonably soon myself.

tomcat

I don't recall, but someone made mention of this before (i.e., paper gaskets) being a cheaper alternative.

http://www.pelicanparts.com/catalog/...pg4.htm#item14

PorKen

Even more

WorldPAC shows the 566 01 for 85-95, and also the 580 02 for 85-95.

Is the later '86 manifold different?

Lizard928

I see no apparent changes, I have an early 86 engine sitting in my garage that had paper gaskets on it, yet my late 86.5 engine which is in my car now had the steel rubber ones, just order the S4 gasket and give it a try, the holes should all be the same.

svp928

I've used them, no problems so far....

BC

The rubber gaskets seem to have a sort of "nose" on them that may hold the injector if it actually goes into the port that far. I took some pics before I posted them. The paper gaskets would allow a more precise port match, but the rubber gaskets could make it more difficult, but the port would be that much "longer"

Jim bailey - 928 International

As noted 85 and early 86 used paper gaskets then Porsche felt the need to use the new improved steel/rubber bead gaskets. But the S-4 engine with a very different manifold went to more rubber less steel . The 87 intake is ALL rubber mounted with the through bolts using steel spacer sleeves and rubber "pressure rings" so the whole manifold floats on the thicker rubber of the intake gaskets and the rubber on the bolts . So what was Porsche "fixing" ??

touque

Ken - I went through the intake gasket ordeal last year and decided to go with the spendy steel/rubber ones, rather than the paper ones (after all, I planned to to keep the car a long time...). When I went to take off the intake on my 86.5, I found the old-style paper ones. If I had known that, I probably would have just went with the same as it worked for 20 years with no issues...

PorKen

Cool. I would like to pull the intake so I can reroute the crankvent hoses.

From the various pics I've found, it looks like the '85 gaskets are plain paper, while the '87 are multi-layer w/ silicon beading.

The '86 gaskets seem like they're maybe designed for heat rejection? I was imagining scanning the paper gasket, having an aluminum copy laser cut, then stacking gasket | aluminum | gasket | ... | manifold, to keep the manifold cool.

PorKen

OK, after reading what was posted while I was typing...

The '87 gaskets are fancy rubber sandwhiches, too. And they'll fit the '86 manifold?

H2

PorKen,

With all that inventin' stuff you do, your brain must hurt...mine certainly would. This is a good topic.

Harvey

PorKen

Just to be sure - you used '87-'95 ...580 02 gaskets? Without issue?

Imo000

I've also used the paper gasket in my '85 and it's been on for 5 years. I'll be pulling the head soon so I can let you know what they look like after all this time. The set that was installed by the PO was also paper and they looked good too.
The '85 and '86.5 intakes look to be exactly the same. I can't tell the diference between the two.

I hope this helps

borland

The rubber on the 87'- is quite soft. They have reinforced the port areas to keep them from getting sucked in by vacuum.

However like Jim pointed out, the metal sleeves on the later intake studs limit the compression of this rubber gasket; as you tighten the nuts until the the washer under the nut bottoms out on the sleeve.