Slow coolant loss
04-15-2007, 11:04 PM
#16
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The waterpump is new from Porsche, not a rebuilt unit. I'll check on the other things in the next few days. Froth is fine for some coffee drinks but not the engine. But I don't expect anything serious - I was just curious about hgf in general.
04-15-2007, 11:25 PM
#17
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I had a coolant leak on my '89 with symptoms very similar to yours, Nicole. I'd have to add 1/2 cup or so every few hours of driving. No signs of leaks anywhere.
It turned out to be the pressure switch. This is a Silver Dollar-sized black plastic piece just forward of the coolant reservoir with a hose connection on both sides and a two-pin electrical connection. I found the leak through luck after lots and lots of looking high and low: One day after driving the car, I stopped, popped the hood, shut off the motor, and then stuck my head in every nook and cranny I could find. With my head close to the reservoir I was able to hear a hissing sound. It was present for less than a minute after shutting off the engine. The pressure switch's seam had let go and was allowing pressure loss.
It turned out to be the pressure switch. This is a Silver Dollar-sized black plastic piece just forward of the coolant reservoir with a hose connection on both sides and a two-pin electrical connection. I found the leak through luck after lots and lots of looking high and low: One day after driving the car, I stopped, popped the hood, shut off the motor, and then stuck my head in every nook and cranny I could find. With my head close to the reservoir I was able to hear a hissing sound. It was present for less than a minute after shutting off the engine. The pressure switch's seam had let go and was allowing pressure loss.
04-16-2007, 12:48 AM
#18
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Thanks, Dave! Another item on my list to check!
Ernest: I forgot to answer aboutt he belly pan: It is temporarily off the car. becaise I was planning to tackle the coolant hoses. Then I got busy with other stuff. Still hope to get to this soon, but I think it might be easier to find the current leak first, before adding other potential areas.
Ernest: I forgot to answer aboutt he belly pan: It is temporarily off the car. becaise I was planning to tackle the coolant hoses. Then I got busy with other stuff. Still hope to get to this soon, but I think it might be easier to find the current leak first, before adding other potential areas.
04-21-2007, 08:39 PM
#19
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When Bill was over on Friday, he took one look and found coolant in the V. Further up, under the oil filler neck, there was cooant as well. We suspected that the thin hose that connects there might have leaked.
Since I'm planning to replace all coolant hoses as a preventive measure, I already had a replacement for this hose. But while replacing it, I found it was extremely tight and dry.
So I checked the larger hose below (not the big radiator hose), and found that its clamp was very lose. Apparently we did not thighten it properly when we replaced that hose during the timing belt job. I tightened it and went for a test drive - no new coolant.
Now I'm getting ready to replace the other coolant hoses that are still original...
Since I'm planning to replace all coolant hoses as a preventive measure, I already had a replacement for this hose. But while replacing it, I found it was extremely tight and dry.
So I checked the larger hose below (not the big radiator hose), and found that its clamp was very lose. Apparently we did not thighten it properly when we replaced that hose during the timing belt job. I tightened it and went for a test drive - no new coolant.
Now I'm getting ready to replace the other coolant hoses that are still original...
