please help coolant shooting from overflow
11-01-2011, 03:48 PM
#1
Racer
Thread Starter
please help coolant shooting from overflow
Hi I have a85 928s and I was drink on highway today around 80mph and when I got off ramp it started leaking coolant thru the. Overflow, and temp went up so i put in a new thermosat that is oem spec ( previews one was 75*) also hoses get really hard cuz so much presure and when engine reaches opearting temp then it starts coming out from overflow, the pump is new coolant was really clean please help me solve this I bought the car a week ago and drove it only for a day and can't stop thinking about driving ...
11-01-2011, 04:19 PM
#2
Basic Sponsor
Rennlist
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Rennlist
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Sounds like an air bubble or the water pump is not pumping.
Did you just change the coolant?
Did you just change the coolant?
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
11-01-2011, 09:03 PM
#5
Captain Obvious
Super User
Super User
Is the radiator hose by the thermostat housing and the driver side, lower corner, of the radiator cold? If yes, the water pump is not pumping (impeller came loose) OR the thermostat is not openning.
When you put a new thermostat in it, did you change the rear gasket and did you test the old thermostat to see if it's working?
To me, sounds like you have a coolant circulation problem.
When you put a new thermostat in it, did you change the rear gasket and did you test the old thermostat to see if it's working?
To me, sounds like you have a coolant circulation problem.
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11-01-2011, 10:13 PM
#9
Racer
Thread Starter
Is the radiator hose by the thermostat housing and the driver side, lower corner, of the radiator cold? If yes, the water pump is not pumping (impeller came loose) OR the thermostat is not openning.
When you put a new thermostat in it, did you change the rear gasket and did you test the old thermostat to see if it's working?
To me, sounds like you have a coolant circulation problem.
When you put a new thermostat in it, did you change the rear gasket and did you test the old thermostat to see if it's working?
To me, sounds like you have a coolant circulation problem.
i changed the thermostat but the rear gasket in the housing was good because the previews thermostat was only a year old, and thats what i was thinking that it got stock but yea that hose that goes to thermostat housing is cold and and now i have a leak at the left (passanger side) plastic radiator end tank, once the engine reaches operating temp the presure makes it leak, do you think it might be headgasket? oil pressure seems good , no power loss, temp seems to stay at 3 bar
11-01-2011, 10:18 PM
#10
Racer
Thread Starter
oh and even after the coolant got dumped from r tank it still tried to push it out but there was not coolant in r tank so it kept shooting just air thru that little overflow hose.i have videos of those things i will try put it on here
11-01-2011, 10:36 PM
#11
Three Wheelin'
I guess to find out if the water pump is working, remove one of the upper hoses and see if coolant gets pumped out when you start the car. Do this when engine is cold. Is the cap a factory BEHR or auto-zone variety.
Do you know what kind of pump the PO used?
Do you know what kind of pump the PO used?
11-01-2011, 10:50 PM
#13
Racer
Thread Starter
If its the pump , would it make some noise or anything? I don't understand how it can just stop pumping if it's belt. Driven , most parts were used from 928 international and 928 motorsports
