924Board.org

John Brown · Joined: 07 Nov 2002 Posts: 903 Location: Leesburg VA

Not up on every possible variation here; especially very early cars that had air pumps and egr. However:

Some one, somewhere, some time, seriously messed with the motor.

The charcoal canister never vented into the crankcase that I know. Anybody? It should vent to the intake. IIRC should go the rear of the air filter box. Or the connection between the metering unit and the intake.

Extremely skeptical about that fitting on the case vent on the side of the block. The oem hose that fits on there looks to be very large but there is a restrictor inside and the actual vent hole is about 1/8" IIRC. (Which might account for a large quantity of oil getting tossed up. Although there is a screen inside the fitting). Have you found anything in the parts book that looks like that fitting? I mean, at that location?

Even with 5000 mile since you loosened it up; unless you took serious measures to 'clean' the motor after sitting for such a long time there still could be 'gunk' in the rings and etc.

BTW, the turbo and several 924DP motors I've seen did have a vent placed at the flat where the original fuel pump bolted. You should not need that vent; but if you wanted to try it as an interim fix that location would be in keeping with previous usage.
_________________
John
80 931 - #931 44Cup
99 Escalade - tows track cars
gone but not forgotten: original 924.org car - 82

Brockoli · Posted: Mon Oct 27, 2008 7:30 am Post subject:

john brown - the motor was from my '77 parts car. It has been rebuilt. What they did tho is a mystery. It has a head from a '81. The person that rebuilt it may of only done head work. I dont really know.

The charcol canister does not vent to the crankcase. I was mistaken. The fumes from the charcol canister mix with fumes from the crankcase and go to the air box like you said.

The picture of the crankcase vent with the questionable fitting was on my other engine that is not in the car. I took a pic of it because it was easier to access. The engine in my car has a different fitting, that is less questionable. But i dont remember what size of hose goes to the airbox, maybe that one is oversized too.

What measures should I take to clean out the rings. Are there any ways of doin this without taking the engine out.

I dont understand what you are talking about with respect to the turbo and 924DP motors? What vent are you talking about by the original fuel pump?

thanks for your help
_________________
'80 924 M471,Wideband O2, Full coilover susp,23/19 sways,Bilstiens,KLA Strut Brace,Roll Bar,Test Pipe,BBS RS, Willwood BBK

25% of a '87 944 Chumpcar http://straightpipe.ca/forums/showthread.php?t=2454

'79 924 Sebring Edition(Sitting)

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

You can sort of see it in the picture below.

Just to the right of the oil filler cap (mesh) you will see a hose running into the head. It runs into the head right where the block-off plate is on our cars. The plate blocks the hole where a mechanical fuel pump can be driven off the cam.

_________________
1987 951 - M193 Version for Japan

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

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

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

Sorry, that's the only one, I scanned it from 911 & Porsche World as an example of a strut brace, there actually weren't anymore engine bay pics from the article that I remember.
_________________
1987 951 - M193 Version for Japan

Brockoli · Posted: Tue Oct 28, 2008 5:09 am Post subject:

chrenan - thanks for clarifying. I had no idea about that. Cool pic!!! I might try the gasoline thing, im goin to google howto clean out rings maybe some good stuff will come up. Ill run that idea by my mechanic friends see what they say...
_________________
'80 924 M471,Wideband O2, Full coilover susp,23/19 sways,Bilstiens,KLA Strut Brace,Roll Bar,Test Pipe,BBS RS, Willwood BBK

25% of a '87 944 Chumpcar http://straightpipe.ca/forums/showthread.php?t=2454

'79 924 Sebring Edition(Sitting)

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

Remember my catch-all tip when working with gasoline, smoke menthol cigarettes as it will cut the gross fuel smell.
_________________
1987 951 - M193 Version for Japan

Brockoli · Posted: Tue Oct 28, 2008 5:44 am Post subject:

you also told me to look into the fuel sending unit with a lighter to see if there was rust in there. My eyebrows are just growing back

_________________
'80 924 M471,Wideband O2, Full coilover susp,23/19 sways,Bilstiens,KLA Strut Brace,Roll Bar,Test Pipe,BBS RS, Willwood BBK

25% of a '87 944 Chumpcar http://straightpipe.ca/forums/showthread.php?t=2454

'79 924 Sebring Edition(Sitting)