Too tired right now to think, but I've observed some strangeness. Head and top end gaskets have been replaced, and there is no evidence of coolant or oil contamination.
1: A slow coolant loss, presumably external. I never did find this last leak, but I think I was close to narrowing it down. It was a "top it off once a week if you drive it a lot" affair.
2: Low coolant in reservoir until I open the cap.
3: Pressure or vacuum hiss when cap removed dead cold, even several days later. Haven't checked which yet. It was parked for some time a while back, and I can't remember if that's normal or not. I never had any coolant trouble with this until it blew a hose and a head gasket a while back.
4: Upon cap removal, level in reservoir will rise; sometimes quite a bit, depending upon how much is left in the system.
5: Bleeding procedures seem to function as normal.
6: Heater works.
7: Parked it earlier after a drive at a steady 193-198 on the Scanguage. A few minutes later someone saw it just let go underneath and void the system.
8: It wasn't a good idea to stick my head under there at the time, but that short hose headed to the water pump coming off that plastic manifold appears to have slid back a bit. I'd say it was balooned, but many hose kits just plain look that way. All I could tell was that the coolant was at least coming from that area, as it was still hot at the time and splashing all over the place. It drained too fast to catch it later, so I may just have to pour some in there and see if I can track the leak.
Something in the back of my mind has been telling me this thing is over pressurized. I think I recently replaced the expansion tank cap, but I moved the receipt file during that hurricane and haven't gone out to check yet.
Damned if I can remember which hose blew for certain that popped the head gasket a while back, but it may well be the same one.
There are a few tests I need to do, but now it's obviously not going to be running for a bit, and I've been told I've got several days of rain ahead of me, and perhaps annoyingly cold weather. I'm just too flagged out to remember. Either way it doesn't look like I'm going to be tinkering for a few days, so it's hypothesis time.
Cheers,
Kennith
1: A slow coolant loss, presumably external. I never did find this last leak, but I think I was close to narrowing it down. It was a "top it off once a week if you drive it a lot" affair.
2: Low coolant in reservoir until I open the cap.
3: Pressure or vacuum hiss when cap removed dead cold, even several days later. Haven't checked which yet. It was parked for some time a while back, and I can't remember if that's normal or not. I never had any coolant trouble with this until it blew a hose and a head gasket a while back.
4: Upon cap removal, level in reservoir will rise; sometimes quite a bit, depending upon how much is left in the system.
5: Bleeding procedures seem to function as normal.
6: Heater works.
7: Parked it earlier after a drive at a steady 193-198 on the Scanguage. A few minutes later someone saw it just let go underneath and void the system.
8: It wasn't a good idea to stick my head under there at the time, but that short hose headed to the water pump coming off that plastic manifold appears to have slid back a bit. I'd say it was balooned, but many hose kits just plain look that way. All I could tell was that the coolant was at least coming from that area, as it was still hot at the time and splashing all over the place. It drained too fast to catch it later, so I may just have to pour some in there and see if I can track the leak.
Something in the back of my mind has been telling me this thing is over pressurized. I think I recently replaced the expansion tank cap, but I moved the receipt file during that hurricane and haven't gone out to check yet.
Damned if I can remember which hose blew for certain that popped the head gasket a while back, but it may well be the same one.
There are a few tests I need to do, but now it's obviously not going to be running for a bit, and I've been told I've got several days of rain ahead of me, and perhaps annoyingly cold weather. I'm just too flagged out to remember. Either way it doesn't look like I'm going to be tinkering for a few days, so it's hypothesis time.
Cheers,
Kennith