I've just bought some poverty Pork…
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Nice post McSam,
Reading the relevant bits of Hartechs rebuild report, it appears that the cooling system design is similar in principle between the M96 and M97 engine.
However, on the 3.4 M96, the head gasket utilised different sized holes across the cylinders, specific to each head, to equalise temperatures. At some point, either the 3.6 M96 or the M97 (can't remember now), they moved to cheaper gaskets that were the same right and left and so causes hot spots that, together with some other design aspects, all contribute to increased localised heating on the bank 2 thrust face.
Reading the relevant bits of Hartechs rebuild report, it appears that the cooling system design is similar in principle between the M96 and M97 engine.
However, on the 3.4 M96, the head gasket utilised different sized holes across the cylinders, specific to each head, to equalise temperatures. At some point, either the 3.6 M96 or the M97 (can't remember now), they moved to cheaper gaskets that were the same right and left and so causes hot spots that, together with some other design aspects, all contribute to increased localised heating on the bank 2 thrust face.
You snooze, you loose. Can't believe this passed me by. 987 with a sick engine for 3k. https://www.ebay.co.uk/itm/Porsche-987-1-2007-Boxs...
andy97 said:
Anyone want to try this:
https://pmsportscars.com/index.php?route=product/p...
£2k 986 that apparently needs and engine rebuild - why wouldn't you just buy the Zanzibar car for £4.5k instead?https://pmsportscars.com/index.php?route=product/p...
Lovely looking early 2.5 silver with red launch colours, only £3500. Shut lines look very poor, has it been shunted?
Silver red early 2.5
Silver red early 2.5
RiccardoG said:
Lovely looking early 2.5 silver with red launch colours, only £3500. Shut lines look very poor, has it been shunted?
Silver red early 2.5
Both bumpers are also a different colour to the main body - good chance its had some sort of incident.Silver red early 2.5
Hmm. If the orange-indicated connection is indeed the bottom hose, then Dempsey is wrong in his book (and on Pelican Parts, from where I culled the photo) and Porsche made a very strange set of design decisions to end up with the coolant inlet route passing so close to the exhaust manifold. There also seems to be ample space to put the thermostat in the green-marked top hose.
It did seem odd that the layout would be reversed into an intuitively worse layout between M96 and M97, so I'm prepared to believe you.
In that case, while the middle section of my post is correct, it doesn't apply to Boxsters, Caymans or 911s. The section in brackets and below does apply.
Do we know at what temperature the 9x7 gauge starts to move? It would be interesting to know how undesirable it is.
It did seem odd that the layout would be reversed into an intuitively worse layout between M96 and M97, so I'm prepared to believe you.
In that case, while the middle section of my post is correct, it doesn't apply to Boxsters, Caymans or 911s. The section in brackets and below does apply.
anonymous said:
[redacted]
On later cars, yes, I expect so. With that statement I was wrongly only considering 9x6 and other cars that do give some real indication of running temperature.Do we know at what temperature the 9x7 gauge starts to move? It would be interesting to know how undesirable it is.
anonymous said:
[redacted]
I've got a separate digital Scanguage reading the water temp from the OBD port on my heavily-modded 3.7 987.1 Cayman. The issues I've had with engine cooling have been documented elsewhere on this forum, but in brief answer to this question, I was regularly seeing the water temp in excess of 110 deg on track, yet the dash gauge was barely moved from it's vertical position. Thus, there are a lot of M96 and M97 engines running way hotter than their owners are aware of ! Reducing that water temp is quite an exercise. I now have a GT3 centre-rad, LTT, a 997 oil/water heat exchanger, a deep sump and a ducted external oil cooler. Only with that set-up are on-track temps down to an acceptable range.
Order66 said:
RiccardoG said:
Lovely looking early 2.5 silver with red launch colours, only £3500. Shut lines look very poor, has it been shunted?
Silver red early 2.5
Both bumpers are also a different colour to the main body - good chance its had some sort of incident.Silver red early 2.5
This is my car - happy to answer any questions on it. I’ve owned it since late last year but since the world changed I’ve got other plans.
It’s a lovely thing, I’ve done around 4k miles in it and it (touch wood!) hasn’t missed a beat. Mechanically it seems very sound. The bodywork is a bit tired in places but it polishes up well and looks great from a few feet away in the pub car park!
Both bumpers have been painted at some point, from accident damage or for the odd parking scuff I don’t know. It is a 22 year old thing after all - it is HPI clear.
I think I’ve priced it fairly for what it is, it’s not a show winner, but it’s a solid, useable car at the bottom of its depreciation curve.
em177 said:
This is my car - happy to answer any questions on it. I’ve owned it since late last year but since the world changed I’ve got other plans.
It’s a lovely thing, I’ve done around 4k miles in it and it (touch wood!) hasn’t missed a beat. Mechanically it seems very sound. The bodywork is a bit tired in places but it polishes up well and looks great from a few feet away in the pub car park!
Both bumpers have been painted at some point, from accident damage or for the odd parking scuff I don’t know. It is a 22 year old thing after all - it is HPI clear.
I think I’ve priced it fairly for what it is, it’s not a show winner, but it’s a solid, useable car at the bottom of its depreciation curve.
Escy said:
You snooze, you loose. Can't believe this passed me by. 987 with a sick engine for 3k. https://www.ebay.co.uk/itm/Porsche-987-1-2007-Boxs...
The car came back on ebay and I pounced on it. 2007 2.7 107k miles, engine issue. 3.5k
Escy said:
Escy said:
You snooze, you loose. Can't believe this passed me by. 987 with a sick engine for 3k. https://www.ebay.co.uk/itm/Porsche-987-1-2007-Boxs...
The car came back on ebay and I pounced on it. 2007 2.7 107k miles, engine issue. 3.5kYour not the only one. It doesn't sound like a big end rattle, it's not a deep knocking. It's quiet at idle (when cold, didn't run it for long). It's nothing on the front end as the seller removed the drive belt to check. I don't think i'm going to get involved as i'm replacing the engine, i'll probably do a compression test and sell it like it is for spares. The seller thinks maybe the IMS bearing, I thought these were either good = engine runs, bad = engine doesn't run, I didn't think they give you a warning. It sounds like it's coming from the gearbox end of the engine.
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