what about fitting jubilee/hose clamps to the appropriate hoses?

http://www.mcmaster.com/#hose-and-tube-clamps

 

this whole thread reminds me of a problem on the original mkI 996 GT3 where some of the coolant hoses split ... I recall driving around bedford autodrome when mine split the car looked like someone
was boiling a kettle in the engine compartment, and despite this the pit marshalls kept me in a line
to get off track despite the huge clouds of steam and my horn honking!

returning from my digression, Porsche issued a TSB for this, perhaps there is a TSB for this problem also, if not those RLers that have experienced this problem might like to draft and sign a joint letter
to PCNA or their regional representative(s).

i.e lets bring this problem to the attention of the company asap.

 

Just another reason not to buy one of these so called track cars. I was thinking the 996 3 must be safe but now that doesn't sound like the case at all.

What tire did coolant hit? I am guessing it must have hit the drivers rear to be so abrupt.

 

OK here you go as per James@SharkWerks....

Here's the 6 locations (sorry rennlist requires 8x6 max on pix). These 6 are specific to the 997GT3 version of the GT1 block. The 996TT etc... have a couple more of these nasties.


This is one of these buggers from a 996TT (also happens). See cast fittings glue and an engine block don't mix...



What you need to do is drill, then tap and secure with a screw along with some red-loctite. And done.

Yes this could have been avoided by the factory but then again I'm sure all these failures are either due to the LWF or reduced back pressure from our exhaust, right? Or is it the excess oil from the rear main seal leaking? Either way guys it's a PIA if it happens to you but for anyone removing the engine for any reason (not just a 3.9L upgrade) just fix these bastards....

 

Alex: So in the meantime the poeple who are suggesting to replace the coolant with H2O maybe ignoring the fact that EG does not only lower the freezing point of water but also raises the boiling point from 100C to 197C...so by repalcing the coolant with water may actually spped up the failure of these weak links when the water boils and generate a tremendous amount of pressure????
http://www.xydatasource.com/xy-showd...glycol&dsid=36
Can you please elaborate on this Alex...TIA

 

Correct on that too man. What we're dealing with is variations in who is doing the work and in terms of the amount of the glue they use, the amount of time it sets, the temperatures at the time and so forth. Then the life of the car is so different person to person. A lot of variables. I think with the GT1 block being at the end they've never really addressed it nor will they. It's an engine out affair but it could be simply taken care of this way from the factory.

I don't think h20 is the answer here. Once you see the fitting and how it goes into the block and the variables involved you'll see it's not what one could call a "permanent" seal. Just can't last this way.

 

I feel that I will be driving the car with a time bomb in the back ready to go off any minute now..Takl about something that takes the fun out of track days....
Any attorneys here that would consider a class action to force Porsche to find a fix for this ......I almost feel like the runaway Toyotas here

 

So...just run with coolant then and live with the risk? Is the 997 the end of the run for the GT1 engine?


On an unrelated note, I am interested in becoming a rennlist member, but when I try to subscribe through Paypal, there is an error and it won't go through. Any moderators here that I should contact?

 

When you get the SW3.9 conversion James does a modification to all the conections to eliminate this problem!! Yet another reason to go 3.9!!

 

I had the hose #19 on the first picture split after a hard drive in a 997.2 GT3 after 1000 miles.
Coolant loss was not catastrophic, but there was a steady flow.
Sorry to hear of all this...
w

 

As the engine ois currenttly out of my RS, this revelation comes at an excellent time. We are going to attempt to TIG each tube 360 deg. as well as change the oil cooler elbows from plastic to alumiinum while we are at it.
Thanks to all fort the very timely heads up!!

 

very dissapointing from an engineering standpoint!

 

That's what I was thinking!

 

What solution does Porsche use on its GT3 RSRs & Cup cars?

 

very good question!