Newbie saying Hi (and needs assistance with his 944!!)

[omigod]

Hi all I'm a newbie to the forum after picking up a 1985 944 V. cheap with suspected terminal engine damage.

On closer inspection however i can find no terminal engine damage but for some reason the sealing ring on the oil filter had been blown out along a 1/2" section between the filter and its mating face, this caused an loud bang and immediate loss of oil (hence the suspected engine damage). has any one known this to happen before?

the oil filter was non standard (mann) which i have now replaced with an OEM item but have not yet tried the engine (yet to buy some oil!!) although it turns over by hand with no adverse noise or resistance. the filter was not especially tight (i unscrewed it by hand - but only just).

this would hint at a possible blockage in the system (or filter) causing a build up of pressure finally being vented at the oil filter ring, but why no intervention of the pressure relief or by-pass valve(s)

Quite desperate to give the engine a try but i thought i would dig deeper into some more experienced minds before showering the garage in oil.

Dave

 

[JamesO]

The oil pressure relief valve is known to stick, it is a part of the oil cooler housing.
Google 'Clarks Garage' it has some usefull information and pictures.

 

[omigod]

Thanks for the tip, thats a very useful website.

Dave

 

[zcacogp]

I had exactly the same problem as you described on a Mk1 Golf GTi once. (Same design of oil filter as well, I think.)

I had, for the first and only time, tightened the oil filter up with a strap wrench, which I think caused the seal to ruck up and poke out sideways. It happened about 20 miles after the filter was fitted ... new filter and new oil and all was fine.


Oli.

 

[appletonn]

ORIGINAL: omigod


the oil filter was non standard (mann) which i have now replaced with an OEM item
Dave

I think Mann is one of the OEM suppliers to Porsche anyway, so should be OK

 

[James_G]

Tiny bit of a thread hi-jack this but I was trying to remove my oil filter this weekend, as I have a leak in this area and was trying to identify the source. I removed the headlamp motor, but there was no way I could remove the filter, even with a filter wrench (the webbed strap type) due to a lack of clearance. This thread has got me thinking that it's been done up too tight and the filter seal is kapput.

So, any further tips for removing the filter that will not render is useless (i.e. not the screwdriver through it as a lever approach)

Thanks.

 

[appletonn]

What about one of those 'socket' type filter wrenches that actually fits over the top of the filter and grips the 'castellations' on the the top
http://www.autoexpress.co.uk/products/products/53438/draper_ofw3.html

 

[James_G]

Ah yes, that looks like it would do the trick. Thanks.

 

[andy watson]

Hi fellers, brought a socket type from our friends Halfords piece of cake to use about 14 quid if I remember, but why did Porsche fit these upside down?? when you undo the filter the thing empties all over the place!!

Am I doing something wrong?

Andy

 

[Diver944]

ORIGINAL: andy watson

but why did Porsche fit these upside down?? when you undo the filter the thing empties all over the place!!

Am I doing something wrong?

Nope - I think Porsche were in cahoots with driveway cleaning companies when they designed this

You can minimise the mess by emptying the sump and then poking a hole in the top of the filter so it's contents run into the sump also. Make sure the filter will come loose first []

 

[zcacogp]

'Tis a daft design, for sure. Causes no end of mess every time you remove the filter, and also means you can't pre-fill the new filter before fitting it, as it all drains out while you screw it onto the mounting.

On the topic of filter wrenches, I bought one of these:

http://www.screwfix.com/prods/48077/Automotive/Mechanics-Tools/Oil-Filter-Wrench

... because I couldn't get a strap wrench in there either. It was a fiver two years ago (now £9 - that's inflation for you!) and it does the job very well.


Oli.

 

[Big Dave]

As far as i can remember, the PORSCHE oil filters have a sort of non return valve built in them, to stop this drain back.. Its there to stop the filter emptying its contents back into the sump ,so when you then staret the engine it has oil rather than being starved.. BUT aftermerket filters DONT have this fitted...
I know a bit drains out when you change the filter, even with a OEM one,, thats just the nature of our cars...
Regarding the original post. I suspect its the oil pressure relief valve stuck. Exactly the same happened to a 968 at Anglesey recently...Oil everwhere.....[ NOT mine i hasten to add]...

 

[tr7v8]

ORIGINAL: Big Dave UK

As far as i can remember, the PORSCHE oil filters have a sort of non return valve built in them, to stop this drain back.. Its there to stop the filter emptying its contents back into the sump ,so when you then staret the engine it has oil rather than being starved.. BUT aftermerket filters DONT have this fitted...

You need to define OEM & original. I did an oil change on mine & my ARO's 944's recently.He had a genuine Porsche filter, mine was MANN which as someone has already pointed out is an OEM supplier to Porsche. I looked very closely at both filters & they were IDENTICAL internally, including check valve.
I keep hearing this pony trotted out about non-original oil filters & it is completely wrong. Do you honestly believe Porsche make oil filters, of course not, they're bought in from someone like MANN. In fact oil filter manufacturers swap filter types with each other as they cannot make every filter in their range.
Every filter I've bought for the 944 has been aftermarket & the only make I've got is MANN, Halfords don't list one under either their own label or the Champion brand.

 

[Big Dave]

Sorry Jim.
Yes GOOD quality filters do have the check valve. Its just i bought a couple of "aftermarket" ones ,Cant remember the make,, Might have been "Cooper filters"[they were orange in colour],,, that DIDNT have the check valve fitted...

 

[tr7v8]

You surprise me, but I've never been offered anything other than MANN for the Pork. Quick enough to check by having a quick look before money changes hands.

 

[Fen]

I agree with Dave. There are pattern filters available without the check valve. Sorry I don't know which as my indie just knows which ones not to buy.

 

[omigod]

I've gone for a Porsche OEM filter as a belts and braces operation - I have no real reason to doubt the integrity of the Mann filter and all of the specialists i spoke to have no reason to question them either, but it was available - and at just over a tenner no financial hardship. Incidentally there is a small amount of oil sludge on top of the coolant so despite the temptation to bung some oil in and try it i may service the oil cooler and PRV assy before.

Next question - any good firms providing the O ring kits by mail order....?

Dave

 

[tr7v8]

ORIGINAL: omigod

Next question - any good firms providing the O ring kits by mail order....?

Dave

Berlyn would be the obvious first thought, not sure what price the OPC would quote,some will do Mail Order
certainly Exeter & Tonbridge do.

 

[zcacogp]

ORIGINAL: omigod
PRV assy

I assume you meant 'assembly', but what is a PRV assembly?


Oli.

 

[tr7v8]

ORIGINAL: zcacogp

ORIGINAL: omigod
PRV assy

I assume you meant 'assembly', but what is a PRV assembly?


Oli.

Pressure release valve AKA Oil pressure release valve.