tomcat

When putting my intake (outer part) on my '85 I broke off one of the tubes that are attached to the aft part of the "oil collector". Just tried to plug it with duct tape (metal tape) to seal it but I don't know how well it's sealed. Went for a drive and it seemed to be fine.

Any suggestions on what to do? I really don't know what to seal the broken end with since its right next to the head where it meets the block.

Mike Frye

John,

If you're talking about the CO tubes, just crimp it and cap it wherever it is. Someone else had the same problem a short time ago and the consensus was that unless your DMV uses these to test emissions, they're about worthless.

JHowell37

What is the "oil collector?" BTW, both tubes on mine are broken.

tomcat

Not really an oil collector. The outer part of the intake (i.e., outboard of the 10 rubber connectors). When you take them off, to get to the valve covers, there is usually oil in them.

JHowell37, what is that in your avatar?

Imo000

Ohhh man! I had a good laugh when I read you last post and I can see how it can be mistaken for something like an oil seperator. That's sipmply the end tank for the intake manifold system. Yes they do collect oil but that's just a side effect of how they were deigned. If every once in a while you let the engine go up to redline it will clear out the oil from the end tanks.

The Co2 tubes can be just crimped, welded shut, or just insert something to plug it.

JP Rodkey

I did that on my '88, but if you want to keep things stock, the tubes are still available and only cost about $25 each. I went back and put new ones in there not long ago.

fabric

These are bolted onto the exhaust manifolds, and one of mine was completely rusted through. If they are letting air in, they could be affecting the performance of the 02 sensor, since it's unmeasured air, so it could help a rough idle or emissions issues. I just removed them completely, and used the stock fitting on the manifold plus a ball bearing to seal it up. Unfortunately I wasn't wise enough to record what size ball bearing, but just take one of the fittings to a hardware store. On the '89 and later that don't come with those, there is an OEM fitting you can purchase to seal it up - 930 113 153 00 according to the PET. The passenger side fitting is easy to get at, but the drivers side is a pain, if the drivers side is intact might just leave it. I hate those things anyway when getting the filter box back on, so I just pulled them both. Don't forget to put something in the hole in the airbox for those mount bolts from the ports, those are underneath the air filter, best to keep any dirt from getting in through there.

Jfrahm

I wonder if an E 0.01 coin would fit under the cap in place of the sample tube? They are 16mm or 5/8." I have been told a lug nut will fit over the nipple but a cleaner look IMO would be to put the cap back on over a sturdy metal disk.

I have a punch at work and make different sized disks anytime also. If you know the size offhand please post it. Thanks!
-Joel.

fabric

I didn't measure anything, like a twit.

But I think a BB will seal it better, and the only time you're going to see it is if you are under the car, and you can only see the passenger side anyway (remember my comment about the driver side being a pain? ), so looks aren't too important.

tomcat

"But Officer, I was only trying to clean out the oil in my intake. It's a Porsche dammit"

This reminds me of a frined that had a brand new 993 Targa some years ago. He was driving 70 in a 45. When the cop pulled him over he told the cop his Porsche can't drive 45. He's from NY so done with attitude. Cop let him off with a warning.

Imo000

Sorry but you got the theory wrong. Metered air is in the intake and not the exhaust system. Now if you mean the O2 sensor and that it will read less air, then it still doesn't matter casue the sensor doesn't measure volume but the % of O2 in the exhaust gases.

I personally woudln't spend $50+sh on replacement tubes. Just cap them somehow and that's it.

Imo000

Just unscrew the ends by the exhaust manifod and weld the tubes shut. That's what I did with mine and if you are nto an expert, you wouldn't knwo the difference. Heck maybe even JB weld woudl work in this case.

PorKen

If you still have the factory cat'verter, it has a third, combined, sample port, so you can still set the CO, albeit with a bit more work.

Mine is missing on the pass side, and I'm going delete the other eventually. Anything to reduce the number of repetative steps for every procedure is good. Especially on a '85-'86!

JHowell37

Here's a bigger picture of my avater. It's the 928 Mad Max Edition.

tomcat

That's quite a paint scheme. Looks better than some of the abstract art in the museums.

Didn't you pick up a 928 a couple of months ago? It that it?