Beaudave
Active Member
Hi to all,
After reading all these very interesting messages, I wanted to share that I have had some little bubbles in my cooling liquid reservoir when the engine is running. So it seemed obvious that I have a compression leak that goes right into the coolant circuit. Obvious, but then my mechanic plugged onto that coolant reservoir an air pump, similar to those to inflate the bikes tires, with a gauge, and pumped up to (I don't remember well) maybe 1.5 bar. That pressure remained still for at least 15 minutes. So he said that at this point we can try a stop leak additive (like Wynns, Bardahl, or other brands).
Of course, compression pressure is way higher that the air pump pressure. But if the coolant circuit withholds 1.5 bar (again this figure might be wrong), for 15 minutes, then the leak may be minor, and could possibly be fixed with such products.
Also, here are some other points :
- no white or blue smoke at the exhaust pipe (except when the car just started by cold temperatures, and stops when engine warm)
- no "creamy sauce" in the oil circuit, as far as I can see
However, yesterday, I pushed a little my car down in the country roads. I was reving up to 4~5000 rpm. No more that maybe 5 or 10 minutes, time for me to get to my destination. Engine temp remained constant, and rather low until I slowed down at final destination. Before I stopped the engine, I could see the temp indicator going up almost to the red zone, without reaching it though. I stopped the engine and all of a sudden there was coolant coming out from the overflow hose connected right under the reservoir cap. I lost a good 1.5 liters coolant.
A couple of hours later, I added about 2 liters of water (I had no coolant around), and drove for 60 km, at a normal driving, not "sporty". And no over heating, no nothing. just about perfect.
So I thought... well, tonight is Halloween... That's the explanation!!!
So I am thinking that there are more and more obvious signs that, either my engine gasket is f**ked up, or (after reading all these messages), maybe the engine head is not correctly tightened. Which withstands the low pressures of reving under 3000 rpm, and lets the compression "fart" out it pushing too much on the engine...
So, messieurs, gentlement, what are your thoughts, advice, expertise ???
After reading all these very interesting messages, I wanted to share that I have had some little bubbles in my cooling liquid reservoir when the engine is running. So it seemed obvious that I have a compression leak that goes right into the coolant circuit. Obvious, but then my mechanic plugged onto that coolant reservoir an air pump, similar to those to inflate the bikes tires, with a gauge, and pumped up to (I don't remember well) maybe 1.5 bar. That pressure remained still for at least 15 minutes. So he said that at this point we can try a stop leak additive (like Wynns, Bardahl, or other brands).
Of course, compression pressure is way higher that the air pump pressure. But if the coolant circuit withholds 1.5 bar (again this figure might be wrong), for 15 minutes, then the leak may be minor, and could possibly be fixed with such products.
Also, here are some other points :
- no white or blue smoke at the exhaust pipe (except when the car just started by cold temperatures, and stops when engine warm)
- no "creamy sauce" in the oil circuit, as far as I can see
However, yesterday, I pushed a little my car down in the country roads. I was reving up to 4~5000 rpm. No more that maybe 5 or 10 minutes, time for me to get to my destination. Engine temp remained constant, and rather low until I slowed down at final destination. Before I stopped the engine, I could see the temp indicator going up almost to the red zone, without reaching it though. I stopped the engine and all of a sudden there was coolant coming out from the overflow hose connected right under the reservoir cap. I lost a good 1.5 liters coolant.
A couple of hours later, I added about 2 liters of water (I had no coolant around), and drove for 60 km, at a normal driving, not "sporty". And no over heating, no nothing. just about perfect.
So I thought... well, tonight is Halloween... That's the explanation!!!
So I am thinking that there are more and more obvious signs that, either my engine gasket is f**ked up, or (after reading all these messages), maybe the engine head is not correctly tightened. Which withstands the low pressures of reving under 3000 rpm, and lets the compression "fart" out it pushing too much on the engine...
So, messieurs, gentlement, what are your thoughts, advice, expertise ???
