Manny Alban

+1 Mine did, got a new one, but still use the clamp.

Sean F

unless you haven't brought the required donuts. it's an often overlooked CVR rule. we've failed many a car for forgetting to bring the required donuts. we're real sticklers when it comes to the donut rule.

CWhaley

Would that be the Famous Krispy Kreme?

kurt M

Not true. The yellow caps I am discusing had sides give out a bit over time, the threads get loose and the cap can weep or at times pop off. Adding the band clamp compresses the sides back in and make the threads engage like new or better. When the caps wallowed out you could turn the cap sort of snug but not snug enough, then the threads give and the cap is full loose again. I have see this at the track more than a few times including fires. For a while as a Tech Chair, I kept a bag of right size band clamps for cars that came through grid tech. Porsche later put out a TSB that instructed to add a band clamp go figure.

YMMV.

Flying Finn

what cap are you guys talking about?

993 cap is metal, not plastic and surely doesn't get soft...
Nor do I see any clamps around it.

What am I (or someone else) missing?

Marks951

My 944 Turbos and my 996 have the yellow plastic cap, none of them have ever felt loose, but the clamp idea seems a little flaky unless it is a place to put safety-wire. How about just buy a new cap when your oil one is so old it gets soft and loose.
AMA, WERA, and CCS require Motorcycles to have hose clamps placed on the oil filter so you safety-wire it tight.

CWhaley

Here is a photo of the 996 cap with clamp....

Also, the only TSB listed for the 996 (99-05).

I stand by my statement that this is more a reaction to litigation: Sure you have situations where someone had oil leaks or possible issues. Still... ROOT Cause of any failure will still be HUMAN error. I am not saying that a 20 year old part will not fail... The 996 CAP is not in this category! IF you have had or seen a failure... It was either a poor installation of the cap or a failed "O-ring" from human error... i.e not keeping it clean or damage from handling.

PasPar2

Marks, you have a point. The metal hose clamp is more likely to works itself off the cap and bounce around in the engine compartment... not a good thing at all. I plan on using a zip tie on the clamp just incase. (zip tie wont melt - will it?)

CWhaley - my cap is a tapered hexagon shape not round like yours... this is why my band clamp slips

CWhaley

PasPar2...

You have the MkII cap which is not part of the orginal TSB... BUT, the DE tech rules do not seperate the difference.

You will have to place the clamp on and apply more clamping force (on your style) then use wire to tie it... if you desire.

Bob Rouleau

Guys, the 996 oil cap rule s common to most if not all PCA regions. All of us have had problems with oil fill caps on the early 996 coming off. When that happens on track, oil does leak out. It can drip onto the headers and start a fire, but more often leak onto the track and ruin someone else's day.

It is a cheap and simple precaution which has been shown to work. In my region there have been no instances of a properly secured hose clamp falling off. The CVR wording also shows up on our tech form at www.rennsport.ca

Best,

CI - Rennsport PCA

CWhaley

I am not refuting the "Safety" ruling nor that it is on most Tech shts (ours included ~ as I wrote it) But, if you are taking the stance that this is the only plastic cap that can cause... OIL ON THE TRACK... Then again I am not in agreement. IF THIS IS THE CHEAP & SIMPLE solution then (by your logic) all cars installed with plastic oil fill caps "SHOULD BE SECURED BY A HOSE CLAMP".

Clearly, I have not expressed nor implied that anyone should not follow the tech procedures set forth.... only that the ROOT CAUSE of failure is typically more then a simple cap design issue!

onefastviking

Just curious, and love pointing out the silliness in some rules, so here it goes .......
Since it's just the yellow caps that cause the problems and are written into the rule, if you painted the cap black would you then not have to put on the clamp ? ? ?

Just having fun here, don't take it seriously. Just buy a new generation cap or install the clamp.

turbo911cm

funny this topic came up. Just was at a DE last week with Chicago region and a guy in his 996 mk1 had oil leaking from the cap. We could not figure out why there was oil leaking, guess I just learned why.

Good news was they caught the oil leaking before he drove on track!

Larry Herman

I have had to put the very same clamps on brake reservoir caps that have swelled slightly and leak. With just a little squeeze, they hold better than new ones.

Bob Rouleau

CW- the rule is in place because DE officials have had the problem. While you may wish to unearth the root cause, a 3 dollar hose clamp and a few minutes with a screw driver prevent the cap from falling off - and quite a few fell off which is why the rule exists. Not many dealers stock new oil filler caps. Any hardware store sells hose clamps.

The problem was confined to the early 996, the GT cars and turbos - with dry sumps did not have the problem, neither did the Boxsters.
So, I'm not sure why you seem to object to a simple solution to what was probably a design or manufacturing defect.

Experience has shown that these were the ONLY ones that fell off, so we're talking real world observations as opposed to theory.