NP993

Why exactly does the engine have to come out? You verified with an external gauge that it really does have low oil pressure?

UserA

I can't wait to Quote Vorsicht saying this:

Read this thread everyday wanting to see the above posted.

Quadcammer

He has a noise that is not going anywhere, hes got what appears to be low compression, he's got an oil pressure problem (bad senders usually peg or don't work at all), and the engine shut off on him and won't restart.

Considering he's been working on this for the past week with the engine in and hasn't gotten very far, it seems like taking it back out and going over everything is a better idea.

Stuttgart951

Simply, really. I blew out the bottom end. Was sort of an "involuntary test."


Without (most of) the dry humor... some of the noises, oil pressure oddities and other head-scratching/eyebrow-raising items you described were very similar to those I experienced in the very short span of time and mileage after an oil change and before I spun a crescent bearing, sheered the IMS and turned the inside of my block into a Small Hadron Collider.

I haven't the slightest idea how to proactively test functionality without splitting the case and, while the probability of an identicle failure is near zero (I am aware of very few in the States; the running theory on most being that a foreign object was somehow sucked into the oil circulation system), mentioning it might provide another straw at which to grasp or lead to another idea which, hopefully, will lead to a solution.

(Edit: Mike beat me to it. Post #196.)

Vorsicht

What did you end up doing? Was it repairable?

Vorsicht

Let us pray to the Porsche gods!

Vorsicht

^^^What Quad said.

Mike J

You do not want to know. Lets not panic yet, just do the tests and get the wrenches out - and keep us posted for sure.

What is your current plan?

Cheers,

Mike

Vorsicht

I found out. Yikes!

Current plan is to drop the engine and try to discover what's wrong. Here's a brief update:

1. Disconnected oil hose at small filter. 4.5 quarts came out and thankfully did not make a mess. Filtered, no debris.

2. Looked in the hole. Nothing obvious amiss. I can see what looks like 2 gears. Will try to get a pic tomorrow.

3. Removed other end of hose and confirmed no blockage inside.

4. Disconnected all top side stuff and some of the bottom stuff. Hopefully I'll have the engine out tomorrow.

Steve Weiner-Rennsport Systems

Peter,

If you have access (beg or borrow) a filter cutter, I'd recommend opening both filters and laying out the paper media onto a clean sheet of butcher paper for a CLOSE inspection. Quite obviously, one never, ever uses a saw of any kind to do this.

Don't need a pic of the oil pump gears; that's what you are supposed to see. Sometimes I will swab that passageway for any little bits of 'smurf', however I think that time may have passed for that to be meaningful.

Mike J

BTW, if you want to makes sure your layshaft is in one piece (which it is in your car since you did have oil pressure) you can rotate the crankshaft and see those little "gears" you can see on the oil intake rotate...

dutchcrunch

i was wondering could the suppply hose from the tank be colapsing when its gets hot.

Mike J

Is quite stiff, so it would only do that if there is a blockage at the tank I would suspect so the pump suction would collapse the hose.

Vorsicht

Didn't get much done today, had to do other stuff. Here's an update:

1. Drained oil from engine. Aprox. 1 quart came out.
2. Drained remaining oil from oil tank. Another quart came out here.
3. That brings the total to 6.5 quarts. Filters still in car.
4. Got a cheapo boroscope and inspected the following:

A. Oil in port (first photo)
B. Engine drain port (second photo)
C. Cylinders 5 & 6 (remaining photos)

The pistons themselves seem fine but how much oil should be on them (see pics). I believe we can rule out valves hitting pistons (at least on 5-6).

Vorsicht

No. I inspected it and it is very stiff. No evidence of deformation.