johnporter
NAXJA Forum User
- Location
- Europe
Hello.
Sorry for my English - I wouldn't ask here, but I have no place to go, not anymore. There are three or four Jeep specialists in my town and I already visited two of them - they have no idea, what's going on. My XJ is not exactly OEM, but as far as I know (I bought it not so long ago), engine wasn't modified at all.
It's '91 XJ (Mopar), 4.0, automatic. With LPG, if that matters. And I didn't change the oil yet, because the mechanic didn't have time (I am really more theoretical guy). It's 10W40 now.
First problem is that engine temperature is too high. Usually after the engine was running for a couple of miles the temperature is perfect, the gauge indicator is vertical, pointing on 100 (I don't know if US gauges are also in Celsius, sorry). But after about 15 miles of driving it jumps a bit: [ photo here ]
Usually it happens when I stop for a while with the engine on, but I'm not 100% sure it doesn't happen also when driving - I try to keep my eyes on the road mostly...
After a while it gets back to 100, but it's disturbing and everyone says it shouldn't happen.
Second thing is oil pressure. On the cold engine and for a while after it's hot, pressure is OK. But after longer drive, like 15-20 miles or so, is goes down to zero. Sometimes it jumps a little bit when I step on te gas, but not really noticeable.
Engine did about 180k miles total. It's sound is quite quiet, but it smells like oil when it heats up. The engine fan works fine and turns on at about 102 degress, the thermostat (sorry if I messed with translating those) is opening as it should, they checked it with some tool that name I cannot remember. The temperature sensor was checked and it works perfectly. The guys who are trying to diagnose it now are saying they are slowly running out of ideas. They link the pressure and temperature issues, but they don't know what exactly it is and we all think it will end up with engine swap.
Also, the interior heating is not really good, which suggests the need of cleaning something inside cooling system (as far as I understood), but nobody says it may help anyhow...
Do you think the engine is dead?
Regards.
Sorry for my English - I wouldn't ask here, but I have no place to go, not anymore. There are three or four Jeep specialists in my town and I already visited two of them - they have no idea, what's going on. My XJ is not exactly OEM, but as far as I know (I bought it not so long ago), engine wasn't modified at all.
It's '91 XJ (Mopar), 4.0, automatic. With LPG, if that matters. And I didn't change the oil yet, because the mechanic didn't have time (I am really more theoretical guy). It's 10W40 now.
First problem is that engine temperature is too high. Usually after the engine was running for a couple of miles the temperature is perfect, the gauge indicator is vertical, pointing on 100 (I don't know if US gauges are also in Celsius, sorry). But after about 15 miles of driving it jumps a bit: [ photo here ]
Usually it happens when I stop for a while with the engine on, but I'm not 100% sure it doesn't happen also when driving - I try to keep my eyes on the road mostly...
After a while it gets back to 100, but it's disturbing and everyone says it shouldn't happen.
Second thing is oil pressure. On the cold engine and for a while after it's hot, pressure is OK. But after longer drive, like 15-20 miles or so, is goes down to zero. Sometimes it jumps a little bit when I step on te gas, but not really noticeable.
Engine did about 180k miles total. It's sound is quite quiet, but it smells like oil when it heats up. The engine fan works fine and turns on at about 102 degress, the thermostat (sorry if I messed with translating those) is opening as it should, they checked it with some tool that name I cannot remember. The temperature sensor was checked and it works perfectly. The guys who are trying to diagnose it now are saying they are slowly running out of ideas. They link the pressure and temperature issues, but they don't know what exactly it is and we all think it will end up with engine swap.
Also, the interior heating is not really good, which suggests the need of cleaning something inside cooling system (as far as I understood), but nobody says it may help anyhow...
Do you think the engine is dead?
Regards.