924Board.org

PORSCHEV · Last edited by PORSCHEV on Thu May 15, 2008 8:49 am; edited 1 time in total

Were there 2 different types of cam bearings? I have 2 engines here and one has no inserts and appears that is couldn't take an insert. The other has inserts the same as a crank rod bearing would have except obviously smaller.

They have the same porsche part # except one is a 6B the other a 6I or something to that effect.
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1976 924
5 lug conversion, 17'C2 wheels,custom body work,327 vette engine.

1978-#53 "D" track racer.

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

I've never seen a 924 2.0L head with replaceable bearings (doesn't mean it doesn't exist, I just haven't seen it). Is it possible that the one with bearings has modified in a previous life?
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erstwhile owner of just about every 924 variant ever made

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Do the camberries have any stampings on them? Someone may have line-bored the head and found correct bearings. If so, I would like to do this to my spare head. . .I hate having no cam bearings.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

PORSCHEV · Posted: Tue May 13, 2008 4:41 am Post subject:

I'll have to take some pics after supper and post them up.
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1976 924
5 lug conversion, 17'C2 wheels,custom body work,327 vette engine.

1978-#53 "D" track racer.

DOCO · Posted: Tue May 13, 2008 4:52 am Post subject:

Would that be like camberries and vodka?

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Doco "where am i going and why am i in this handbasket"author unknown
79 924 N/A "Webster"
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[+]___[+]
\0 924 0/
[__]..[__]
"WEBB STR"

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Cam Cod, actually.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

Paul · Posted: Tue May 13, 2008 12:03 pm Post subject:

Why bother? The stock cam bearings, when properly oiled, will probably last as long as the driver....

Machining them for bearings will weaken them.

I have never seen replaceable bearings in a 924 head of any type. If Porsche ever did it, it would be shown in the PET.
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

emoore924 · Joined: 13 Apr 2004 Posts: 2822

Porsche never did that. Must be aftermarket mod.

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Joes924Racer · Posted: Wed May 14, 2008 2:08 am Post subject:

Bearing caps yup been there corse only with a na motor.. porchev no pics of your other projects yet.

maybe I didnt look close enough thuogh I checked out your site.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

so, one of the weak points of our engines is the oil tube above the cam... the must have been some people who encountered the nasty experience in which the tube malfunctioned, with all nasty side effects...

Stupid people ignore the noise and drive till it breaks down... and there you go, specially tuned cam bearings from hell.
line boring and adding inserts is quite a good option imho, especially when you have seen the damage from the oil tube... I'd expect the thing to malfunction again if I have seen it before, so I'd rather add inserts with a slight probability of having to change them when the tube breaks down, than buying another head twice or thrice or quadrupice. or five times.

I think it makes sense if someone has made these modifications. Today most of the cars do not have inserts, except from some audi's I've seen... so it probably isn't better....until it breaks due to oil starvation. I think it is better to replace a bearing insert than a complete head when you face the choice what to do with your damaged head.

Last week I asked a pretty woman behind the train station "would you give head for bearings?"...

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"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

PORSCHEV · Posted: Wed May 14, 2008 11:29 am Post subject:

I got busty last nite needing to go put a new prop of the boat and then had to go fishing early a.m.

I get pictures in the a.m.

BTW I need bearing caps 2-3-4..does anyone have any kicking around from an old head?
_________________
1976 924
5 lug conversion, 17'C2 wheels,custom body work,327 vette engine.

1978-#53 "D" track racer.

endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana

I'd like to get the numbers from those inserts. I have a head with some mismatched caps from another head I'd like to salvage if possible. I think you would have to do the same PORSCHEV if you find some different caps. Mine look like they line up but I don't trust them.

Todd
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'79 924NA. Rebuilt 9.5:1, MSDS header, Mega Squirt Injection, MJLJ-EDIS Ignition, 1.6L Whipple Charger and Intercooler, 10lbs Boost, 944 Trans, Custom HD Clutch.
"simsport" said....superchargers are better than turbos its official!....

Paul · Posted: Thu May 15, 2008 8:39 am Post subject:

The head and caps are aligned bored as a unit. Not recommended to use caps from another head.
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.