Well, I’m perplexed. Replaced the heater pipe and that took care of the last of the leaks. Then I reassembled the engine to get it to a running state.
First start. Idling a little lumpy. I let the engine continue up to operating temp, HVAC heater on high and fan on. Throughout the warmup, I got no hint of exhaust gas in the coolant. Once the thermostat opened up, a rush of gas came through until the coolant hit the tester in the filler neck. No change in the test fluid. Shut the engine off to avoid too much of a mess. Here’s some videos of the lumpy idle:
https://youtu.be/QnOdEsyxqm8?si=XqiDUoQtbQmMh01q
https://youtu.be/a6oymgFkHS0?si=Y94G3IWHkUffKYBy
Second start. Continued to sniff the coolant with heater open. Nothing. But this time the idle was silky smooth. I ran it until the thermostat opened and sent radiator fluid into the tester. There were some bubbles as it spilled out the filler neck. I haven’t done much with hot open cooling systems; I’m guessing the surge of coolant has more to do with it being hot and finding the path of least resistance.
https://youtu.be/vImaF5KG-ys?si=mi3WlzWhMwb6Kssh
Just to make sure, I took the tester to the tailpipe to make sure the fluid turned yellow sniffing straight exhaust and it did.
So I’m confused. My gut feeling is that there has to be something wrong with this engine, but all tests seem to point to it being okay. What am I missing?
02-17-2024, 07:43 PM
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