New '79 3.0 SC owner. Advice needed
Discussion
Hello there. I recently purchased a G series 911. I absolutely love it and find myself using it for every journey, no matter how impractical it is.
There's a few things with it that I wonder whether they are foibles of the car ("they all do that, sir") or whether I need to get some bits looked at.
1. After driving around for 30 mins or so, when idling in traffic it's around 1800 rpm rather than the 1000 when I first head off. Is this normal?
2. The first, second and third gears are a bit of a pig sometimes (especially first) and you really have to ram the stick into place or you get a god awful grinding sound. Is this normal?
3. At motorway speeds the air sound flying into the cabin is really loud. It feels like it wouldn't have left the factory this way, even in the 70's, so I think maybe some part is missing that blocks/channels this from the front of the car (the noise is coming from the bonnet area). Or, is this normal?
4. Can anyone explain to me how this heating control works? It seems to range from absolutely useless to barely usable. Once again, is this normal?
There's a few things with it that I wonder whether they are foibles of the car ("they all do that, sir") or whether I need to get some bits looked at.
1. After driving around for 30 mins or so, when idling in traffic it's around 1800 rpm rather than the 1000 when I first head off. Is this normal?
2. The first, second and third gears are a bit of a pig sometimes (especially first) and you really have to ram the stick into place or you get a god awful grinding sound. Is this normal?
3. At motorway speeds the air sound flying into the cabin is really loud. It feels like it wouldn't have left the factory this way, even in the 70's, so I think maybe some part is missing that blocks/channels this from the front of the car (the noise is coming from the bonnet area). Or, is this normal?
4. Can anyone explain to me how this heating control works? It seems to range from absolutely useless to barely usable. Once again, is this normal?
Hi,
The throttle spring mechanism may be either clogged with dirt and is sticking or I found the carpets can get jammed in the accelerator. Try cleaning the accelerator area and the attachment to the throttle in the engine bay. WD40 and cloth. If you do need to go into a garage the idle is relatively easy to reset, so shouldnt be a big bill. Dont quote me though.
Gears, sounds like if all are difficult the clutch and or shifter need adjusting. Usually gear 1or 2 can be crunchy, but not so much all of them at once.Again, if its just adjustment this isnt usually a big job.
Wind noise-probably old rubbers. The doors may need adjusting and new rubbers. Again, not silly money if thats all it is.
Heater, renouned for being crap. Check hoses are attached properly to heat exchangers and under the dash and that the fan is working. Often hoses can become detatched or fans fail, fuses can blow etc. Failing that - suggest a coat.
Sounds like you need a good specialist and the car needs some pampering for a few hours by someone who knows their stuff. If they recommend big bills, get a second opinion from somewhere else before getting work done.
The throttle spring mechanism may be either clogged with dirt and is sticking or I found the carpets can get jammed in the accelerator. Try cleaning the accelerator area and the attachment to the throttle in the engine bay. WD40 and cloth. If you do need to go into a garage the idle is relatively easy to reset, so shouldnt be a big bill. Dont quote me though.
Gears, sounds like if all are difficult the clutch and or shifter need adjusting. Usually gear 1or 2 can be crunchy, but not so much all of them at once.Again, if its just adjustment this isnt usually a big job.
Wind noise-probably old rubbers. The doors may need adjusting and new rubbers. Again, not silly money if thats all it is.
Heater, renouned for being crap. Check hoses are attached properly to heat exchangers and under the dash and that the fan is working. Often hoses can become detatched or fans fail, fuses can blow etc. Failing that - suggest a coat.
Sounds like you need a good specialist and the car needs some pampering for a few hours by someone who knows their stuff. If they recommend big bills, get a second opinion from somewhere else before getting work done.
Point 1 - No they should not do that - google Porsche 911 hot fast idle (it can be an endless list of items).
Point 2 - I have a 76 (2.7) same 915 gearbox - Mine is a delight, the only time it comes close to noise is going down from 5th to 4th when you have pause for a 1/4 of a second to let the reverse lock do its job. Yours mIght just need the gear linkages looking over, worse case a gearbox rebuild.
Point 2 - I have a 76 (2.7) same 915 gearbox - Mine is a delight, the only time it comes close to noise is going down from 5th to 4th when you have pause for a 1/4 of a second to let the reverse lock do its job. Yours mIght just need the gear linkages looking over, worse case a gearbox rebuild.
Wilmslowboy said:
Point 2 - I have a 76 (2.7) same 915 gearbox - Mine is a delight, the only time it comes close to noise is going down from 5th to 4th when you have pause for a 1/4 of a second to let the reverse lock do its job. Yours mIght just need the gear linkages looking over, worse case a gearbox rebuild.
From experience 915 shift problems often require a gearbox refresh. But of course try the other things firstGassing Station | Porsche Classics | Top of Page | What's New | My Stuff