P944

Hi guys, this is my first time on a forum and it’s great! I own a 944 1985.5 that I purchased 10 years ago this summer. The problem I have is with the time it takes to get some oil pressure when starting the motor cold. A few years back, I started noticing that it was taking about 6 or 7 seconds to get some oil pressure. I asked around to see if this was normal and every mechanic I asked said it was normal. A year later, I was taking about 10 to 12 seconds to get some oil pressure. The oil pressure sending unit then stopped working soon after. I replaced the OPSU thinking it was going to fix the problem but no luck. Interesting enough, I didn’t have the problem when I parked the car nose down in a slopped area. Last year, I took the car out late in the season and the problem had gone worst. It was now taking 22 seconds to get some pressure. I then took the oil pressure valve from the oil cooler cover and notice that the valve couldn’t seal the oil properly since the bottom of the seal is gone. I’ve included some pictures. I’m not sure what it normally looks like but in my opinion, it not normal. Any idea on what I should do with this? Is it the block or another piece?

Thank you for your help,

Frank

75ohm

I feel like I have beer goggles on and those look HOT! ... can you get some better pics?

P944

This should be better. Let me know what you think.

75ohm

How's the oil level and coolant mixture look?

P944

They were both good. There was no oil in the coolant and vise versa. I had a small oil leak coming from the oil cooler cover. This was most probably due to the oil pressure built-up...

Money Pit 951

What oil filters are you using?
Silly question I know, but actually important

Charlie

What are the pictures of? Is that inside the oil cooler where the OPRV goes or what? Sounds like you are having an OPRV problem. Do you have the old 3 piece or the newer 1 piece?

75ohm

Agreed...

P944

To answer both of you:
- I always use a original oil filter purchased at the dealer part # 944-107-201-08
- As for the pictures, it's a view of the opening for the OPV once the oil cooler is removed. It's like looking inside the block.
- I've included a picture of the actual OPV. Since the car is an 85.5, I suspect that it is the old three piece one, although it's only one piece. I believe that the one piece came out in July 87 but it's possible that this one was upgraded.

Does it normally have a rubber bushing at the end? Is the part where the OPV makes the seal inside the block replaceable?

xsboost90

the part inside the block should be pressed in. If you have a one piece it could be the updated one piece early fit unit. Anyone have PET w/ a drawing of this?
I would find a three piece unit and try it out- see if that cures your pressure problem.

KuHL 951

First off your OPRV needs an O-ring on the end. Yours looks to be very poorly aligned, you need to loosen the oil coller cover and use an alignment tool. Last but not least the OPRV you show is the one-piece coversion unit that replaced the 3-piece units from 83 to 86. You absolutely, positively need an o-ring on the end of that unit for it to work right. I bet the old one is broken up at the base of the sleeve the old piston type slid into. Here's helpful thread.

P944

xsboost90 - I'm concern about the alignment and mainly the missing part of the bottom seal inside the block. I have a feeling that even I try the 3 piece OPV, I will have the same start up problem since it won't seal it tight.

KuHL 951 - I will install the proper O-ring on the end of my OPV. Is it hard to take it apart to replace the inner one? For sure I will use the alignment tool to put it back in. Thanks for the link to the thread.

How should I go about to change the damage piece inside the block? Do I need to pull the motor? It would really help to have some drawings of this area...

Thanks again

Charlie

I would measure the OPRV and try to determine if the seal is made by pressing the O-ring against the part that is broken, or if the seal is made on the side walls of the sleeve. I bet the O-ring presses against the broken part. If that is the case then the question is how to remove it? Maybe someone that has an engine out can determine that. Maybe an older 3 piece will work as previously mentioned by X.

P944

By any chance do you have picture or drawing of a three piece OPV? As you motioned the best thing would be the input of someone who was the motor on his work bench... It would be great to have a picture of the OPV opening from an engine that is working properly to see how it should look like and how to remove that part...

I'll go try to go determine what the "missing" O-ring would be pressing against.

75ohm

Goto 944online.com and check out Ian's pictures! They are worth 1000 words...