what is an 'early' 3.4 996?

[shalmaneser]

ATM said:

1998

This is the same as my car - early cable throttle 996 (although mine is w reg for some reason). This car still hits the London ULEZ criteria which is the NOx emissions need to be below euro 4 standard of 0.08g/km.

As London ULEZ is only concerned with local emissions this is the critical value as NOx contributes to poor air quality, CO2 and HC don't matter. Obviously this varys from place to place.

I assume e-gas cars have better mixture control as well as having two lambda sensors per bank one of which monitor the catalytic converter on an ongoing basis.

[ATM]

shalmaneser said:

ATM said:

1998

This is the same as my car - early cable throttle 996 (although mine is w reg for some reason). This car still hits the London ULEZ criteria which is the NOx emissions need to be below euro 4 standard of 0.08g/km.

As London ULEZ is only concerned with local emissions this is the critical value as NOx contributes to poor air quality, CO2 and HC don't matter. Obviously this varys from place to place.

I assume e-gas cars have better mixture control as well as having two lambda sensors per bank one of which monitor the catalytic converter on an ongoing basis.

I think the biggest difference is the later cars have a secondary air pump. These feel like tom foolery to Me. They pump fresh air into the exhaust. I have been quoted as saying this is to make the exhaust gasses appear cleaner but someone corrected me and told me this isn't that simple. Ok so the fresh air does something else to the gasses and this can help the cat - not sure. But fresh air gets added to the exhaust before it passes through the cat and out the back. Make of that what you will. I'm tempted to remove it on my 2001 car. Must weigh a couple of kg.....

[Dammit]

IIRC (but this maybe wrong) that it's to get the cat up to its optimum operating condition faster - when they're cold they are far less efficient, hence emissions are higher as the filtration is (largely) absent.

I await a correction from an exhaust scientist.

[ATM]

24 grand

C4
2001
Manual
80000 miles
Hartech rebuild in 2017

https://www.pistonheads.com/buy/listing/13154699

[Fast Bug]

Spent the morning running around in mine today after its new MOT yesterday. Forgot how small they are until I parked in the supermarket car park

[ATM]

Fast Bug said:

Spent the morning running around in mine today after its new MOT yesterday. Forgot how small they are until I parked in the supermarket car park

All clear no advisories?

[Fast Bug]

One advisory for the handbrake being a bit crap, in fairness it is pretty st. I'll get that sorted later in the year when I hand over my life savings to my indi for the work he's going to do

[SteveStrange]

Given the hot weather we have had lately, I had reason to have the climate control in the car set lower than the ambient temperature yesterday. Shock horror, the A/C was blowing warm, even after a 40 mile drive. It was working fine last summer. I had the bumpers and various rads off late last year, and cleaned out the gunk, and all looked shipshape and very tidy (once hoovered/hosed out) on both the front and back sides. Is there a way to check for damage to the condensers at home, or do I really need to take for a regas and leak test? Would any condenser leak be visible if the engine was running and A/C set to max (as in Low temp, full fan)?

[flatsix.ant]

https://classifieds.seloc.org/ads/1998-porsche-911...

This looks a great buy for someone.

[deckster]

SteveStrange said:

Given the hot weather we have had lately, I had reason to have the climate control in the car set lower than the ambient temperature yesterday. Shock horror, the A/C was blowing warm, even after a 40 mile drive. It was working fine last summer. I had the bumpers and various rads off late last year, and cleaned out the gunk, and all looked shipshape and very tidy (once hoovered/hosed out) on both the front and back sides. Is there a way to check for damage to the condensers at home, or do I really need to take for a regas and leak test? Would any condenser leak be visible if the engine was running and A/C set to max (as in Low temp, full fan)?

If it's blowing warm then there is no gas in there so nothing to see in terms of a leak. You'll need to get a proper leak test (not just a Kwik Fit freebie jobbie).

If it makes you feel any better my perennially leaky aircon was fixed by the simple expedient of replacing every single pipe, both condensers, and the compressor

[Fast Bug]

Another little run out earlier

[shalmaneser]

My Aircon is leaky too, but it does last 18 months or so between recharges... And the condensers have definitely seen better days.

Is that uv sensitive stuff in all Aircon systems? Can I get a UV torch and try and find my leak?

[996driver]

shalmaneser said:

My Aircon is leaky too, but it does last 18 months or so between recharges... And the condensers have definitely seen better days.

Is that uv sensitive stuff in all Aircon systems? Can I get a UV torch and try and find my leak?

Normally some common places to look to check the pipes if the condensers look ok. They run just beneath the sills on driver's side and stupidly close to the jacking points so can easily get crushed if they're not careful. It might be obvious if you have a look at the pipe condition. If not then it might need a full test. My condensers were shot but the pipes were also knackered.

[delays]

996driver said:

shalmaneser said:

My Aircon is leaky too, but it does last 18 months or so between recharges... And the condensers have definitely seen better days.

Is that uv sensitive stuff in all Aircon systems? Can I get a UV torch and try and find my leak?

Normally some common places to look to check the pipes if the condensers look ok. They run just beneath the sills on driver's side and stupidly close to the jacking points so can easily get crushed if they're not careful. It might be obvious if you have a look at the pipe condition. If not then it might need a full test. My condensers were shot but the pipes were also knackered.

Agree with this. Common places are condensers, or where the pipes join the condensers (rubber seal degrades) and the pipes under the car.

[Hoofy]

[shalmaneser]

delays said:

996driver said:

shalmaneser said:

My Aircon is leaky too, but it does last 18 months or so between recharges... And the condensers have definitely seen better days.

Is that uv sensitive stuff in all Aircon systems? Can I get a UV torch and try and find my leak?

Normally some common places to look to check the pipes if the condensers look ok. They run just beneath the sills on driver's side and stupidly close to the jacking points so can easily get crushed if they're not careful. It might be obvious if you have a look at the pipe condition. If not then it might need a full test. My condensers were shot but the pipes were also knackered.

Agree with this. Common places are condensers, or where the pipes join the condensers (rubber seal degrades) and the pipes under the car.

I've had a look at my pipes and they are in not great condition but look ok - no obvious wetness. The condensers are not in great condition though, definitely need replacement.

[nunpuncher]

The zircon on mine worked perfectly during the test drive. Following the PPI where they replaced one of the condensers it no longer worked. I assume there's a good chance it just needs gassed. However, In 3 years I've only ever had 1 long motorway drive on a hot day where I wished I had air con.

[alan-87]

Have been following this thread and others like it for a while and finally pulled the trigger on an upgrade from my 986 putting down a deposit on a 98 C2 last night.

Spec wise it's exactly what I wanted:

Zenith with full factory aero
GT3 look split wheels.
Manual
No Sunroof
Hardback sport seats

It's also had a pretty much every single mechanical component / suspension work possible done over the last few years including an engine rebuild. So I'm hoping it's going to give me a couple of years without too much pain.

Picking it up at some point next week and very excited. Have a trip to caffeine and machine planned at the weekend as a first run out.

Gratuitous pic below!

[jimmy p]

Looks lovely that, didn't see that advertised??

[MrC986]

Alan - 87, aerokit 996s are relatively rare even amongst the PH group, but amongst my group of friends we've 3, but they’re all C4 manuals (the 3rd is another silver one that's missing from the pic as rarely gets driven by my friend ). We’re about 1hr from C&M btw