Oil pressure light & ticking sound
 

Hello experts,


I have recently purchased a 993 and stupidly, I decided to get an oil change at just any service center.


Oil was drained, then 11 liters of 15-W50 (Liqui Moly) were added along with 2 cans of 'Ceratec' (Liqui Moly) and 2 genuine oil filters.


'Ceratec' is a liquid used for wear protection for engines, transmissions, pumps and compressors


Immediately after starting the car, the oil pressure light went on, and would only disappear after engine is revved above 2 RPM. it would come back at idle. I went for a 7 km ride, and straight to 'Porsche service center' .... oh, and engine was making a ticking sound ever since.


Service manager, advised that the 'Ceratec' has significantly reduced the viscosity of the oil, resulting the oil pressure light to come on. Also, the oil filters seemed to be very dirty.


I am freaking out right now, and scared the engine will need an overhaul.


Appreciate your help Pleaaaase.


thank you
Mutasem

I'm always sceptical when people start mixing and matching their own oil blend.. there is a real science to getting it right...

Apart from any better advice, I would want to get all that crap out of my motor asap. For now just use plain ole mobile one 15-50 it's a known entity... See if the ticking problem goes away and pray that the cams aren't scored...
Drive the car for a couple thousand miles and have an oil analysis done to check for metal.

Best of luck

Did they drain old oil out the pressure relief valve by mistake?

this has been discussed here before

If so you'll need to replace the spring & ball bearing that was flushed away

ooooo... that is a good idea...

Isn't that too much oil??

I'm sure they only put in 8qts but they probably billed for 11 litres.

#2 reason why you never take your 993 to just any service station.

Hello,

Thank you for your help. All messages are being shared with the mechanic :-)

I believe the oil was drained from 3 different parts of the car. Two of which had a spring.

Another explanation I obtained, was that since the car has been dormant for 4-5 months, the additive has done its job and cleaned the system, and all the residue remained in the tray. Therefore, the residue along with the new oil, has been circulated back into the system and blocking the lifters. Also, I was advised to clear the tray and check the oil pump.

logical??

Thanks
Mutasem

I don't think the oil & additive has anything to do with it low oil pressure will cause old lifters to click - as simple as that

3 drains & 2 springs??? DOH!!!
Was the 3rd the transmission?

What I mean is
do you have any oil in your transmission?

Please don't drive this car hard til you fix this

Sorry to go on like this but what I'd do is change both the engine and transmission oils properly just to be sure

ill shut up now🙂

Thank you for bringing this to my attention.

The air cooled cars in town are only a few, that's why expertise is limited, and I seek your help.

The first thing I will do tomorrow is request for a check up on transmission oil, and to check the oil pressure relief valve.

Thanks
Mutasem

And the oil thermostat valve

Will do. is it something that I should be worried about? i only drove the car for 10km after the warning light appeared.

these are strong, well built, engines designed to be abused. As long as you didn't thrash it i.e WOT pulls to red line, I think you'll be OK.

The oil is it's lifeblood though, so you need to resolve this asap.
let us know how it turns out and...



THIS

You may be over-filled. Check oil level at idle, engine hot, and on level ground. I would drain that out asap.

For future reference:
Do not add additives.
You only drain oil from 1) oil tank and 2) 15mm crankcase bolt

Don't worry it is unlikely you damaged the engine. Just make sure the pressure relief valve has all its parts and fill the car with the proper synthetic oil such as Mobil 1 or other. I once ran over some debris on the highway on my 86' Carrera and punctured one of the oil cooler hoses. Pumped all the oil out of the engine in seconds. Oil light came on. I was still able to drive the car the short distance home. Had the leak patched up and went on to drive the car 120K miles and sold it in perfect running order.

Wow!

You were able to drive home with all the oil out of the engine? Gives new meaning to the word tough!

Hello Folks,


Thank God matters are now resolved. Oil in the engine seemed to be quite old, which has left over residue and debris after oil was changed. This debris remained in the system, and has limited the oil pumps functionality causing low pressure readings. Also, I would like to add that some part of the relief valve was missing (see pic).


The engine will be flushed twice, and 15W50 Liqui Moly (molygen) will be added. I believe this is non-synthetic. any


I love this forum, your input was key in diagnosing the problem, and rectifying the situation.


I will be taking a sleeping pill tonight :-)

yeah, missing the piston from the relief valve will certainly cause a problem.

The problem was entirely the result of them draining the crankcase through the oil pressure relief valve and not installing it properly (i.e. with a missing part). Old oil and debris had absolutely NOTHING to do with it. You can grind up a camshaft and mix it with 75w90 transmission fluid and pour it into the system, the engine oil pump will still generate pressure at idle. Make sure the original service center reimburses you for the second oil change.

Hi Jason,

I think you are right. The root cause of this is the oil pressure relief only.
Anyway, will be filling the car with non-synthetic 15W50 Liqui Moly oil as there's no synthetic in that grade.

Mobile1 oil in town is locally produced. So Ill go on with German imported oil :-)

have a good week end peeps :-)

not sure what you're getting at, but mobil 15w-50 is synthetic and pretty well regarded. I'd suggest using mobil 1 vtwin anyway though

how about a picture of her now she's running smoothly...

good GOD.....

Oh yeah, Mobil 1 15-50W is on sale at Walmart, $22.88 for a 5 qt. jug.

Car is currently undergoing major maintenance at Porsche service center. Will share a video once its back. Until then, I am sharing a pic from last weeks P's get-together.

Relief Valve Location and Part #
 

I can not remember having this apart for quite some time.

Been off awhile with car in the garage.

Been Suffering Ear issues and Vertigo.
Additionally I can not remember forgetting anything.

Not to take away from the OP thread But can someone give me a part #?
May also be beneficial to other members.
I do not recall pullin this apart Just to do an Oil change?

Just lookin up Sunset part site now.
Would like to get under my car this week and take a Look?
Almost time for a Road Trip
Thanks TJ