944Ross

So you didn't put water INSIDE the tubes of the condenser? Just washed the fins?

EV is still the best bet. You should try wrapping the capillary tube with insulation, it needs to conduct temperature back to the EV. If it stays warm, the EV will stay wide open.

m73m95

Try hosing down he condenser (AC on....) while you idle the car in your driveway. This will cool the condenser considerably, so the air coming out of the vents should make your nipples hard enough to cut glass.


Me thinks your feeling the pleasant effects of switching to 134 in a system made for r-12 (small condenser). Meaning, its working just as it should. R-134 is not as efficient as r-12, especially in as humid of place as N. Carolina.

TheDice951

well.... i will wrap the EV and try hosing the condensor down and see the difference.... like i said it is cool and its cool enough to be tollerable for the drive to work but i was thinking that it should be alot "cooler" than it is....

i was under the dash today, looking at the vac lines and noticed the heater core was HOT.... i thought about it and am looking at this.... http://944online.com/cgi-bin/ASI_Sto...skukey_1000035

tomorrow i will see if its opening and closing like it should.... the coolant shouldnt be getting in the cabin if the heat isnt turned on right? im thinking this could be a culprate as well...

pnbell

Look at My Post #6 in this topic...

This Heater Control Valve is probably sticking open; especially if you say the Heater Core is Hot... You can actuate the lever with your hand.
http://944time.com/porsche/images/20...trol-valve.jpg

Also as i said earlier feel the two lines going into the firewall on the passenger's side of the engine bay. They should be cold when the AC is running.

JohnKoaWood

OR, as I recently discovered on a local listers car, the vacuum lines are incorrectly routed causing the valve to not recieve the proper vacuum signal.. verify the vacuum lines run from the check valve (small, blue or black, near the brake booster) to the vacuum reservoir with a T to the firewall nipple, the other firewall nipple runs to the heater control valve...

TheDice951

Well... I checked the valve, it was open with the car off... Then I started it and it closed... The ac was off and so was the heater... The valve vacuum line goes to the bottom nipple on the fire wall.... I am just confused as to why the heater core is hot when that valve is "closed" I have not checked to see if the valve stays closed when the a/c is on...? Maybe I should huh....

pnbell

Would this certain "local lister's car", happen to be the car in your profile pic by any chance? Maybe a Ramius? ha ha! So that's why his heater valve was staying open? interesting...

dontnow

How about manually closing the heater control valve with a vacuum tester http://www.mityvac.com/ and see if the ac temp is normal.

joes

Just because it is "closed" doesn't mean anything. There are seals inside that may be gone and still letting plenty of hot water by. ( ask me how I know)

86 951 Driver

I bet your heater control valve is bad. It happens and will make the A/C not cool as well.

My old 924s would cool just fine with R134a.

944Ross

Whatever happened on this?