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Sudden loss of oil pressure

Thanks, that's interesting. It certainly sounds and looks very over-engineered. I've always assumed that the common problem with them flagging a fault on the dashboard arises from the float becoming slightly less buoyant with time and hence sitting lower in the oil than it should; is that the case?


Oli.
 
I have a brand new one and two nearly new Oli, and they both cried wolf on a slight uphill gradient.
 
Oh yes, the whole uphill-gradient thing - I'd forgotten that one too.

Mine shows a warning if the level is about 1/5th of the way down and it's parked on an uphill gradient, or if it's stopped and re-started very soon after being started from cold (I assume because the oil is thick and not draining quickly back into the sump). I take it as a notification that I need to top the oil up with about 200ml sometime in the next few days .... [;)]


Oli.
 
IT LIVES!!!!!!

Nothing is ever straightforward though, there was a crack in the bracket that holds the fuel dampener onto the rail. Pressure tested the rail and it was fine so had it welded up and a couple of strengthening bits done too. I have a spare rail so will get that strengthened and then powder coated at some point this year and fit that one.

Ran up to temperature until the fans came on and then fully bled the system, put a bit too much coolant in but the overflow will take care of that no doubt. Hydraulic lifters were silent so I definitely dodged a bullet there - either through good luck or good oil (Royal Purple) but I'm sticking with the same oil and hoping for the same luck.

Aiming to pick it up tomorrow if I can get a lift to the garage and then take it to our regional club night on Weds - although last time I went to a club night this happened!

First Trackday is in a month's time, with having had the rod bearings changed are there any precautions or running in procedures to consider?
 

ORIGINAL: Eldavo



First Trackday is in a month's time, with having had the rod bearings changed are there any precautions or running in procedures to consider?
Click to expand...

With anything new internal engine wise I'd change the oil soon (asap) after using it again... for full rebuild perhaps around 500 miles or less. You may be ok for longer with only rod bearings changed but IMHO better to be safe than sorry. You haven't done the bores so should be ok with fully synthetic oil, professional engine builders seem to advise mineral oil as a cheap alternative to specialised oil made for the running in process.

Pete
 
Nearly a year on and although the engine mounts where inspected at the time I was never entirely convinced as there was (and still is) a vibration at idle that disappears as soon as the throttle is blipped.

Going to check out Berlyn, JMG and OPC for prices. Had a message from FrazerPart that their engine mounts are just the solids rubber ones as are Design911's - seen some mounts on eBay direct from Germany that sit midway between the price of OPC and FrazerPart and proclaim that they're hydraulic, anyone got any clues? If no feedback then I'll play it safe with known proper items.

http://pages.ebay.com/link/?nav=item.view&alt=web&id=371291059053
 
They use chambers of hydraulic fluid to help with shock dampening. It is a simplified form of a dampener in normal suspension. They should be better than normal rubber mounts.
 
Thanks Jonathan, I don't think I explained myself too well. I know how they work but wondered if anyone had any experience of them as an option rather than the £150 each for OPC-supplied mounts?
 
Type 911 have two versions. I thought that the dearer one (£50 or so) was hydraulic, but I might well be wrong. Worth a call.
 
Spoken to them and the dearer OEM-spec part is a Meyle mount that is listed in Meyle's parts catalogue as a "Hydro Bearing" with a 951 part number.

However, Internet folklore seems to suggest that the Meyle part is in fact a solid rubber mount despite their website description so I've emailed Meyle's technical department for the definitive answer.
 
I emailed Max at FrazerPart and he told me that theirs is a solid rubber mount whereas I've had this response from Meyle:

Many thanks for your email.

I can confirm that the part is a hydro bearing and it does contain fluid.

Kind regards,

Meyle UK
 
I went through this a few months back...eurocar parts sell the Meyle mount along with a cheaper option...I also contacted Meyle wanting clarification that the mount was hydraulic and got the same answer, whether it's as good as the genuine mount remains to be seen, they certainly look alike.

Pete
 
What did you end up doing Peter?

Considering Erring on the side of caution and ponying up for the genuine Porsche parts unless I hear rave reviews of the opposite :(
 
The plot thickens - spoken to FrazerPart and they're adamant that Meyle have told them the part is a solid rubber mount. If forwarded my email from Meyle and (Max?) is going to speak to them in the morning - certainly sounds like Meyle technical department might not know what they're actually selling.

£300 to the OPC is looking more and more likely.
 
I went with the Meyle hydro bearing type for a number of reasons the biggest of which was my son can get them at trade. Another factor was that i still needed to spend a lot of money and I'm on a tight budget, also changing the mounts isn't a massive job and thus the Meyle's will do for now. One thing that is important is to make sure that you still have the heat shield that covers the right hand mount, if not even a genuine mount won't last very long.

Pete
 
I got some from Promax many moons ago, 50,000 miles later still perfect, but Augtronic now makes the mounts life easier....[:)]

These old 2.5 balancer engines must be as smooth as a six?

George
944t
 
I fitted the Meyle hydro bearing mounts to my S last year, but I was advised they were solid, I'm sure I emailed Meyle at the time and they confirmed that they were solid.

I have a feeling that my drivers one needs doing on my Turbo (can feel vibration through drivers side of car at idle), so would be good to get to the bottom of this, this car has had both replaced fairly recently (in terms of mileage) - but no suggestion as to manufacturer. The drivers one was done by Hartech, so I'd expect Porsche parts, but if it has failed that quickly (less than 10k miles iirc) then maybe not.

I really need to get underneath and have a proper look, but was going to go with Porsche parts this time, so will be good to know if you do find a hydraulic alternative.

Keep us posted :)
 
Another update:

Max from FrazerPart has been fantastic and has sent me a lengthy email trail between himself and his contact at Meyle.

The Meyle parts he sells ARE hydraulic bearings and ARE fluid filled. To his credit, he thought that they were solid rubber. It turns out that the solid rubber part was an earlier 911 part that was interchangeable with the 944 part and had a part number 1 digit different.

The parts with the 951 part number are fluid filled so it looks like I'll take a punt on them and DIY the work.
 
sounds good news... it confirms what Meyle told me and makes sense otherwise why call them hydro? I doubt if they are up to OEM standards but then they're a 3rd of the price and as i said before if you don't have the mount heat shield fitted then they will burn out pretty quick no matter what mounts are fitted.

I will report back how long mine last...hopefully this will be a long way off...:)

Pete
 
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