Jakkq

some time ago I started a thread about my battery not holding. With some help of members I replaced the battery, and cleaned up my Fuse Relay Board, added new Fuses, and cleaned the ground points. This got my 1982 928 S running and pretty much all the electrics working.

Thought I should start a new thread about what I may believe to be a Head Gasket situation. I would like to get this diagnosed as soon as possible, and hopefully you experts on this topic will know what to say.

Here it goes:

The day I got my Fuse Relay Board back in and everything, and fired up the car, I received a storm of white smoke coming from my exhaust. Not only that, but some liquid from the exhaust as well. I checked the Coolant Reservoir, which was empty. I added coolant, and there has not been any white smoke since.

The car was sitting outside for a good while. Lots of rainy days, humid and moist days etc. so I am thinking the fluid coming from the exhaust could just be some condensation build up? Liquid does not spit from it every time I start the car up, or drive it. In fact, I got nothing today. This can also happen when firing the car, and shutting it down before it has time to heat up, and doing this multiple times correct? I have done this quite a bit, especially with working on the electric testing things.

Now, after having done all this electric work, I was still receiving power loss, especially when idle. I have not yet diagnosed whether or not the power loss is an electrical problem or not (too see if the voltage continues to drop after time) because of this next issue,

I am getting a burning smell. Didn't take long to hint the smell coming directly from the Intake Manifold Runners, no burning smell coming from the Manifold itself. This would heat up pretty fast, shortly after a few revvs of the engine. I did not notice any oil or residue on any of the runners or manifold.

Something is also squealing below the engine, after idling for a few minutes. I cannot tell what it is. It does not sound like a loose timing belt, but since I was getting a lot of heating I was told that it could be Water Pump failure. The Upper Radiator Hose does not seem to be getting hot after awhile (it is suppose to be, correct? Usually ater normal temperature of 180 degrees Fahrenheit?)

I do not notice any oil in the coolant.

I do not have any water or white fluid mixed with the oil, from what I can tell. I smelled under the oil fill cap and I could hint a gas smell. I am not sure if this is normal or normal for the type of oil that is in there. I have never really stuck oil up to my nose before. I also got a bit of thick brown mudlike crud around the little seal inside the top of the oil fill cap, aswell as some in the leading hose.

Was going to go get a Combustion Leak Tester today, but I could not find anyone that carried them.


What do you guys think? What should I check next? What are some other Water Pump test I could conduct? This could still be the culprit.

Mrmerlin

to check for a coolant leak and if your bottle was empty with no puddles ,( thats a lot of coolant to loose) ,
check the right hand side of the radiator for white deposits,
and inspect the bottom sides of the exhaust manifolds for white deposits.
Also inspect the heater control valve and short hose it these parts are older than 5 years replace them.

NOTE the quick way to figure a head gasket leak is to pull the plugs,
you will be looking for plugs with the tips that are very clean.
IE no deposits on them the coolant steam cleans the plug tips,
also you may find a bit of rust on the electrode portion seen with a magnifying glass.
post pictures of the plugs in the order of layout.

for the hose not getting hot first suspect is the thermostat and the rear seal,
also the system may not be full,

to fill it remove the cap then turn on the heater then run engine till the fans come on,
then put on the cap then drive for 5 miles with the heat on then park it let cool then top up as necessary
you may also need to replace the cap as it might be weak

WallyP

A gasoline engine generates just over a gallon of water vapor for every gallon of fuel burned, If you repeatedly start the engine with a cold exhaust system, much of the vapor will condense in the exhaust system, and will be blown out with higher engine speeds. This will also create some water sludge in the filler neck area.

One check for a faulty water pump is that you get no heat from the heater with the heater valve open and the setting motor on full hot.

You need to find the cause of the squealing/squeaking. One check is to use a spray bottle or water gun and squirt water onto the accessory drive belts with the engine running. If the noise changes or goes away, it is likely to be belt noise.

Jakkq

Will have to get a smaller ratchet tomorrow to remove the plugs. Like usual on these cars, there is little to no room to pull the Spark Plugs out. From what I can at least see from the top of them, they look pretty damn clean.

There are some white spots on the Fan and on and around the Radiator, but there are signs like this all around the car. The original owner let sit outside all winter with no cover or anything. Lots of moisture got in, and I believe this is just corrosion from moisture? I have a lot of this white/steel looking stuff on most of the bolts, even the interior. Basically metal/steel pieces.

I did not notice any white deposits around the Manifolds.

I will try more tomorrow or Tuesday when I have time next.

Mrmerlin

there is a tool for removing the plugs in the tool tray if you have all the tools

Jakkq

Nada. I have a Socket that fits for removing the plugs, but all my ratchets are too long and hit everything in their way. Do you know a source link to the tool you are speaking of?

Mrmerlin

928intl has used tools

Rob Edwards

http://www.mailordercentral.com/928i...721%20012%2002

Jakkq

You are speaking of this tool here?

http://cgi.ebay.com/ebaymotors/PORSC...motiveQ5fTools

Mrmerlin

thats it

Jakkq

Here are the Spark Plugs. 1 on the far left, followed by 2 and 3.




Looks like Carbon foul and some oil. Oil in the plug wells too.

Mrmerlin

no coolant is hitting these plugs if anything they are grounding out from the oil in the well ,
and there is oil in the combustion chamber

Jakkq

This is no sign of a blown head gasket though? Does this mean my Piston Rings are worn?

Are these the white deposits you were speaking of?


What I was confirming before though was that signs like this are all over the car, on metal parts, probably from too much moisture? Water Corrosion?

Example on Belt Buckle

Speedtoys

It's surface corrosion..

Welcome to a 30yr old car.


Thirty. Years. Old.


It means..fix the oil leak. Oil doesnt get to the plug boots from the rings...but thats a diagnosis past just running well.

Jakkq

Where are some notorious areas for oil leaks? Last night when I posted the pictures, I had taken a real good look at everything and didn't really notice any oil anywhere until I walked to the back of my house where I leave the 928 parked under a car roof, to notice a little dried oil puddle, and so I took a look under the car to notice oil still residing on the very bottom.

I'll have a good search go today when the sun comes up, and get a couple more jacks to get the car up in the air.