Dean Peach
New member
I haven't got a problem with misting in the rear lights because I haven't been in the rain yet but I was told when I viewed a different 964 that it's a common problem. Out of interest is this true?
misting in rear lights.
- Thread starter Dean Peach
- Start date
Dave Wilkinson
New member
Yes - it's true. Part of the rear light cluster is not vented and often mists up after rain.
Regards
Dave
Regards
Dave
38F3E1
PCGB Member
I noticed my car has a small bore pipe coming from the back of the center reflector up to the inlet system. Same setup as the other pipe coming from the distributor.
I know the distributor vent pipe is there to suck air out the inside of the distributor to protect the belts so I assume this second pipe does the same thing for the center relector.
My questions are ... is this a standard setup or has the car been modified for this ... and does this fix the misting problem in the rear lights too?
Ian.
I know the distributor vent pipe is there to suck air out the inside of the distributor to protect the belts so I assume this second pipe does the same thing for the center relector.
My questions are ... is this a standard setup or has the car been modified for this ... and does this fix the misting problem in the rear lights too?
Ian.
Guest
New member
I have just replaced the centre reflector and the RHS light cluster and both the new Porsche parts had these vent pipes.
I think the misting is made worse because the outer plastic breaks away from the inner assmbly and so rain runs in from the bodywork - at least that is why I had to replace mine.
BTW they are not cheap £125 for the rear light clusters and over £200 for the centre reflector/ reversing/fog lights.
I think the misting is made worse because the outer plastic breaks away from the inner assmbly and so rain runs in from the bodywork - at least that is why I had to replace mine.
BTW they are not cheap £125 for the rear light clusters and over £200 for the centre reflector/ reversing/fog lights.
Dave Wilkinson
New member
Ian,
I'm pretty sure you'll find the air flow is the other way around - the pipe is attached to the blower plenum on the output side of the blower, so the air pressure will cause the air to flow from the blower to the distributor and rear lights. The original setup was only to provide venting air to the rear lights. There is a connection to the rear panel and from there into the central light unit. There are two pipes attached to the left and right extremes of the central unit which attach to the side units. I suspect the side units often don't get re-attached if they get removed for one reason or another. Even so, I believe there is a still a problem in that one section of the left and right rear light units is not vented and can still mist up. Cracks in the outer lens don't help matters either.
The distributor vent system was introduced in late productions 964s (I don't have a date) and recommended as an upgrade to all earlier models with the twin distributors. It seems many earlier models were not done since there seem to be many which come to the secondhand market which have not been done. When I bought my car in 2004 there was no sign of a vent kit.
Regards
Dave
Dave Wilkinson
New member
Mark,
I'm curious - what do you mean by "substantially" vented?? It sounds a bit like being "partially" pregnant!!
AFAIK the Turbo light units are identical to the non-turbo cars - there is a single vent tube attached to the corner of the unit which comes from the central light unit. This provides a stream of slightly pressurised air from the rear fan. I know the Turbo has two rear fans although, I believe, only a single distributor.
Regards
Dave
Dave Wilkinson
New member
Mark,
I see what you mean!! The vents along the top edge of the light units was a later addition - there was originally a rubber seal - I think around 1992. If that year is correct it would have been around the time when the 964 Turbo was first introduced so it's likely that the Turbo never had the rubber seals. If you buy new replacements now you can only get the versions with the vents. However, it's not those vents which make the difference - it's the forced supply of air through the tube from the blower fan which seems to make the difference.
As Brian said abovem the main problem always seems to be the reflector part of the light unit - it's not vented and suffers a build of of moisture, particularly when it rains - and it seems to take days to dissipate even when parked in a dry garage.
Regards
Dave
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