![]() The problem is that even once you do that, if you do that, you then have a strong upper engine working on a 170,000 lower engine. “At that point I looked at the cost of paying someone to tear it all down, then magnaflux the heads and fix the bad valves and put it all back together: not a small amount. I didn't do the leak down test to confirm if it was the intake valves or the exhaust valves. With the wet test showing little improvement, the inescapable conclusion was that the valves were compromised. But even after doing the chemical fix which worked I still had loss of compression. The initial compression test indicated a problem and I wanted to believe a head gasket problem was the source of that loss of compression. I wanted to believe that I could solve the problem without tearing into the heads, but the reality is that even if the intake manifold gasket were bad, or if the plastic intake manifold were warped (as the local Buick Dealer Tech suggested), that would not change the compression problem. “The DuraSeal headgasket treatment I used (without any sodium silicate in it's formula) did seal the head gasket problem, but made no difference on the compression values, obviously). (This might be something to add to your article on analyzing the compression test.)” the 120 in other cylinders, I came to the conclusion that I had a valve problem due to overheating. “Based on the fact that a wet compression test only brought the value up to 80 psi, vs. “Here is an update for you from my experience:” “, I notice that in your article, you don't say much about what the conclusion is if the compression test is bad, or discuss the leak down test to confirm if the problem is from the rings, the intake valve, or the outgassing valve.” Update: Blown Head Gasket Confirmed -Solution: Replace The Engine Any experience or light to shed would be appreciated.” I figure I need to rebuild or get a used engine installed. At that point, I figure that it may be a valve problem, a burnt seat or a bent valve, etc. Another compression test gave the same results, and when we added a spoonful of oil (for a wet compression test) it only came up ten pounds, to about 80 psi. Even after I solved the coolant leaks, which I don't know if those were from the head gasket or the intake manifold, I was still getting those codes.” compression reading on #3 and #4 and was throwing P0303 and P0304 codes. “, I used some Duraseal to overcome some coolant leak problems, but still had a 70 lb. “I lost a water pump going up a 6% grade incline at high speed and wasn't watching the temp. ![]() This is the first email I received from Dave explaining that his water pump failed and asking some more specifics about the compression test he had performed: NOTE: This tutorial supplements the information found in this article: How To Test A Blown Head Gasket (GM 3.8L) and with Dave's permission, I have posted his diagnostic and repair solution in its entirety: Initial Post: Water Pump Failed And Misfire Codes P0303 And P0304 The post in this page is one that offers several important lessons.Īlthough this the information in this article pertains to a GM 3.8 liter V6, it can be applied to anything rolling around on pavement that has a water-cooled engine. I have learned a lot myself over the years and this website is my way of giving back. I love that the Internet allows us to learn from other's experiences.
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