SD Porsche Fan

How do I keep the heat shield that sits between the exhaust manifold and oil filter from rattling?

SD Porsche Fan

This may be the source of my problem. What type/size of bolt goes here (heat shield from the under side)?

SD Porsche Fan

*bump*

Can anyone tell me type/size of bolt?

PorscheDoc

Well i can find that heat shield in pet, but not the bolt. I would go M6 or 8 x pretty short. Good idea to pick up a selection of m6,8,10 bolts in various lengths, they come in handy in situations like this. I would get a few sizes and just find one that fits.

PorscheDoc

Actually looking at that picture, it almost looks like the bolt may be broken off in the hole, but maybe it is just the camera angle.

SD Porsche Fan

Thanks Karl! Good ideal on picking up a variety of bolts. I'm pretty sure it's not broken off but have a buddy that can back it out if it is.

Thanks again.

Porsche-O-Phile

JB Weld?

Duct tape?

Wrigley's spearmint?

Bungee cords?

Removal of heat shield?

Socks?

Sorry, I'm in a smartass mood tonight. IIRC most of the heatshield bolts have 8mm heads on them.

dualblade

it looks like it would be the same bolt as the one northeast of it. is that an allen bolt? it looks like a 6mm allen head, which should make the bolt an m8

SD Porsche Fan

Oh yea... now were talking

I put everything back together to take the her out for some cool weather evening driving. I'll pick up a variety of allen bolts and some JB Weld just in case

Has anyone removed that shield? Any problems in doing so?

PorscheDoc

Well, it must not be too hard to remove, beause my car doesnt have one....course it doesnt have most of what is suppose to be there, lol.

SD Porsche Fan

I guess I'm more worried about the oil filter succumbing to heat from the manifold. If I can't get another bolt on there to stop it I'll think about removing it.

Porsche-O-Phile

I wonder if that was only added in the later cars - my '86 951 doesn't have it (I'm pretty sure). I just changed the oil & filter yesterday and don't remember it being in the way. . . I'll double-check.

Peckster

Why would you want to remove it? If you can't afford to maintain your car properly...

It's only a bolt, and I'm pretty sure Porsche had a reason for installing that shield in the first place.

SD Porsche Fan

Of course I'd like to maintain the car as it is supposed to be and it's not a question of "affording" to do so. If that were the case I would have never bought a 16 year old 951.

I do know from talking to a couple of 911/930 guys that some of the shielding has actually retained too much heat in certain areas and caused longevity problems and that removing certain shields has proven beneficial for the "health" of their cars.

I guess that's the whole reason behind my post. If the old bolt is sheered off and I can't remove it and the vibrating begins to wear on the manifold or oil filter can I reasonably remove the shield without any detrimental effects?

It seems to me that many 951 owners don't have it so it was either added on for later years or someone removed it. If so have they had any problems?


Can anyone check in PET to see what year this was added?

Danno

"can I reasonably remove the shield without any detrimental effects?"

I wouldn't do it. The shields' are there to protect your oil-filter, oil-filter housing, oil-pressure sender and motor-mount from the intense heat. I've seen coked-up oil on the inside of an oil-filter housing off a car without heat-shields. Not a good thing for the oil-pressure sender, the filter or even worse, the oil-pressure relief valve...

"Can anyone tell me type/size of bolt?"

I think there should four M6x1.25mm , 10mm long holding that heat-shield together. Two of them holds the two halves of the shield together on top of that bracket. Another holds the bracket to the block. And another one bolts one of the shields to the block.

An easy and simple way to get to these bolts from underneath and on top is with 1/4" drive ratchet, 3", 6" and 12" 1/4" drive extensions, and a 10mm socket with built-in wobble. A normal 10mm socket on top of a wobble on the end of the extensions won't work because the end will be too long. Spend some time finding this socket, it will save you tonnes of time!

BTW- removing these heat-shields is one of the secrets to removing the headers without having to pull the head or the studs. Putting the shields back on afterwards is a little more difficult, but it can be done.