Question about 1987 Porsche 928
When I run my car for about 10 minutes the overflow resovior keeps bubbling up, and the heater indicator needle keeps climbing to hot everytime. I don't know how to bleed the system incase there is an air lock.
If you hve water bubbleing while engine is running 5 will get you 10 that you have a blown head g asket ,suggest you go to radiator sevice centre,they can pressure test it and also have device to tell you if you have exhaust gas in the coolant. wont take more than 5 min. then you will know exactly where you are at...
Posted on Jul 29, 2009
You did not say how long have you had this car or how much experience you may have with Porsche (especially the 928) cars. So here are some comments for your consideration based on my experience:
I have had a 1987 928 S4 for a LONG time.
If your car is overheating:
1 - you may have a radiator problem (restricted coolant flow due to "crud" in the radiator. Someone may have put radiator stop leak etc. in it, or poor quality coolant over the years created deposits. - have a radiator shop test the radiator "flow". If someone has put in "normal" coolant and NOT the phosphate free (preferably Porsche coolant) you will develop a problem over time.
2 - your electric fans may not be coming on - you can see this by visual inspection.
3 - the "flaps" in the front of the radiatort may be stuck in "closed position" thus not allowing sufficient air to flow across the radiator.
4 - you may have "stuck" thermostat.
5 - you may need a new water pump - this is probably your problem because they were known to fail especially if the car is NOT driven regularly. Your Porsche dealer service shop OR an independent Porsche service shop should do this for you - it is fairly comlicated procedure. While you are there - change the timing belt and rbuild or change the belt tensioner as well. Then drive the car.
1987 928 S4
1995 928 GTS 5-spd
1999 996 Carrera
Posted on Feb 27, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 05, 2013 | 1998 GMC Sonoma
May 08, 2012 | 1995 Toyota 4Runner
Feb 20, 2012 | 1999 Cadillac DeVille
Nov 26, 2011 | 1995 Dodge Intrepid
Jun 13, 2011 | BMW 323 Cars & Trucks
Jan 09, 2011 | 1991 Chevrolet Cavalier
Jan 05, 2011 | 1998 Pontiac Bonneville
Nov 18, 2010 | 1999 Buick LeSabre
Oct 06, 2009 | 1991 Chevrolet S-10
Jul 14, 2009 | 1997 Toyota Avalon
760 people viewed this question
Usually answered in minutes!