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> Oil out of the Exhaust ..., what's wrong?
SirAndy
post Jul 6 2003, 12:04 AM
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left the engine running for a while (maybe 20 minutes or so) to test the aux-air valve (which seems to be broken, doesn't close completely) and once the engine was hot, it started to spit oil out of the exhaust.
little spreckles on the floor. quite a few.

what's wrong ??? (IMG:style_emoticons/default/confused24.gif)
i know the valves need adjustement badly. could that be it?

Andy
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MarkV
post Jul 6 2003, 12:16 AM
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My car spits condensation out the tail pipe if I let it just sit & idle. That is probably what is going on with yours. (IMG:style_emoticons/default/smash.gif)
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SirAndy
post Jul 6 2003, 12:22 AM
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QUOTE(MarkV @ Jul 5 2003, 11:16 PM)
My car spits condensation out the tail pipe if I let it just sit & idle. That is probably what is going on with yours. (IMG:style_emoticons/default/smash.gif)

nope, it is OIL.
smells like oil, tastes like oil, looks like oil. (IMG:style_emoticons/default/cool.gif)

it's way too much for just condensation ....

Andy
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ChrisReale
post Jul 6 2003, 12:42 AM
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Oil is into the combustion chamber and not burning off, thus being forced by the exhaust valve. Or, it is seeping through the guide. (IMG:style_emoticons/default/confused24.gif) I dont know if a valve adjust will fix that, I would think it would definitly improve things though. How many miles are on your heads? (IMG:style_emoticons/default/confused24.gif)
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thesey914
post Jul 6 2003, 12:54 AM
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Oil is guuud...that means your Xchangers wont get rusty inside (IMG:style_emoticons/default/cool.gif).
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Jeroen
post Jul 6 2003, 04:53 AM
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Hey Andy,

Great news! This means you'll be installing a 3.6 before you know it (IMG:style_emoticons/default/happy11.gif)

cheers,

Jeroen
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Mark Henry
post Jul 6 2003, 07:22 AM
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Take a valve cover off, with a screwdriver apply some force sideways on the exhaust valve retainer. If you can see it move your guides are toast, time for a head job.
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SirAndy
post Jul 6 2003, 11:27 AM
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QUOTE(thesey914 @ Jul 5 2003, 11:54 PM)
Oil is guuud...that means your Xchangers wont get rusty inside (IMG:style_emoticons/default/cool.gif).

i have the stainless steel heat exchangers from a vendor i'm not allowed to mention here (hint, hint) (IMG:style_emoticons/default/rolleyes.gif)

Andy
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SirAndy
post Jul 6 2003, 11:28 AM
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QUOTE(Jeroen @ Jul 6 2003, 03:53 AM)
Great news! This means you'll be installing a 3.6 before you know it (IMG:style_emoticons/default/happy11.gif)

i wish. the good old 1.8 has to last at least through the winter before i have enough money to tackle the 3.6 conversion ...

Andy
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SirAndy
post Jul 6 2003, 11:29 AM
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QUOTE(ChrisReale @ Jul 5 2003, 11:42 PM)
How many miles are on your heads? (IMG:style_emoticons/default/confused24.gif)

no idea. bought the car in 2001 from a dealer who had no idea either.
the engine serial# says it's a 74, and judging from the condition the engine was in, that's probably the last time it was worked on ...

Andy
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SirAndy
post Jul 6 2003, 11:31 AM
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alright, i will start with the usual then.
compression and leak-down test, check the guides, adjust the valves ...

and then see if that improves the situation.

Andy
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MarkV
post Jul 6 2003, 01:59 PM
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QUOTE(SirAndy @ Jul 5 2003, 10:22 PM)

nope, it is OIL.
smells like oil, tastes like oil, looks like oil. (IMG:style_emoticons/default/cool.gif)

it's way too much for just condensation ....

Andy

Andy,

It isn't possible for raw oil to be coming out of your tail pipe w/out a $$it load of blue smoke. It might feel oily & probably has some black soot in it but it but it is not raw oil. (IMG:style_emoticons/default/barf.gif)
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SirAndy
post Jul 6 2003, 11:55 PM
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QUOTE(MarkV @ Jul 6 2003, 12:59 PM)
It isn't possible for raw oil to be coming out of your tail pipe w/out a $$it load of blue smoke. It might feel oily & probably has some black soot in it but it but it is not raw oil. (IMG:style_emoticons/default/barf.gif)

that's what i thought too, but i have 2 oil-puddles on each side (manta exhaust),
enough to make you slip and brake your neck (about a coffe cup full of oil on each side), just from running (idle) for 15 minutes or so.

that seems way too much for anything condensation i have ever seen before. and it does smell and feel like oil (IMG:style_emoticons/default/sad.gif)

could a bad piston ring let that much oil pass by?
any other way the oil could make it into the exhaust?

and again, it only starts after the engine has warmed up.

ahhhhhh, so close and now that!
(IMG:style_emoticons/default/headbang.gif) Andy
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SirAndy
post Jul 6 2003, 11:56 PM
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QUOTE(MarkV @ Jul 6 2003, 12:59 PM)
It isn't possible for raw oil to be coming out of your tail pipe w/out a $$it load of blue smoke.

no smoke at all, by the way. cylinder not firing plus worn ring ????

gotta get some beer now and relax ...
(IMG:style_emoticons/default/beerchug.gif) (IMG:style_emoticons/default/smilie_wirdgut.gif)
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thesey914
post Jul 7 2003, 07:41 AM
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I agree with Mark...I get a big black sooty oily puddle on the garage floor when my engine warms up and if the door is shut I can see it spitting black droplets on to it's white surface.
This particularly happens on engines that are run infrequently, like mine.

I was concerned about it until I realised it was condensation....which is where the "only happens when the engines warmed up" part comes in as the 'zorst pipes act like a big condenser.
If there's no blue smoke like it was burning oil I reckon mikes on to something there.

The oil could've wept out of the barrels/valve stems while the engine was stationary and collect in the Xchangers, mix with the condensation and get blown out the tail pipes.

If you have a temp gauge you could try running the engine until the oil gets to 90/100 deg, which seems to take ages with these type4's, unless you go out and really drive it hard -then see if the exhaust is still spitting.
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thesey914
post Jul 7 2003, 07:59 AM
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Just went out and ran it until warm...this is what I'm getting all over my jack and the floor-


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Anton
post Jul 7 2003, 08:40 AM
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Yaaagh, what a mess. Looks like the inside of bathroom porcelain after a Mexican dinner left the building... (IMG:style_emoticons/default/barf.gif)

Anyway, I agree that the valve stem guides might be to blame. This is probably why the valve clearance is out of range. This will repeat until any excessive play in the guides is solved. (IMG:style_emoticons/default/smash.gif)

A problem with the exhaust valve guides is compatible with unburned oil; the combustion has already been and as fumes are driven out of the combustion chamber oil gets sipped through the guides leaving the engine. (Venturi effect; anyone care to comment on that? (IMG:style_emoticons/default/stfu.gif) )

If it are the piston rings you would have a very bad compression as well. So, is the engine running badly?

Strange that it happens on both sides of the engine as the Monza has two mufflers (as my memory serves me correctly).

Good luck with establishing the diagnosis. (IMG:style_emoticons/default/headbang.gif)
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Jeff Krieger
post Jul 7 2003, 08:54 AM
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If your engine was spitting so much oil out of the tailpipe, you would surely see the oil level in the crankcase go down, right? I would check that.
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J P Stein
post Jul 7 2003, 09:03 AM
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Your pic of the "stuff" on the floor puddles up more like water
than oil. I suspect it's a mixture of crud from the muffler & water (condensation). I'm somewhat of an expert on smokey startups.......that much oil would produce a bug killing cloud.
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Porsche Rescue
post Jul 7 2003, 09:14 AM
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Sure looks like dirty water to me. I have puddles from a bad main seal and they don't look like that.
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