Hot engine = low oil pressure = warning light
04-28-2009, 12:29 PM
#1
Racer
Thread Starter
Hot engine = low oil pressure = warning light
Hi all,
my car have develop a strange behavior. When i am in traffic the car get really hot, some time about 3rd line on oil temp (around 10 o'clock position). When i put the car is in D the RPM will dip a bit and the oil pressure will dip very low as well then the oil pressure warning light will come up. after i give a about 1.2k rpm the warning light will go away. This never happen till recently.
where should i start trouble shooting this problem?
regards
tenn
my car have develop a strange behavior. When i am in traffic the car get really hot, some time about 3rd line on oil temp (around 10 o'clock position). When i put the car is in D the RPM will dip a bit and the oil pressure will dip very low as well then the oil pressure warning light will come up. after i give a about 1.2k rpm the warning light will go away. This never happen till recently.
where should i start trouble shooting this problem?
regards
tenn
04-28-2009, 12:49 PM
#2
I'd check:
It's unlikely that your oil level is low enough to effect the cooling capacity, but it's worth checking.
The thermostat is in front of the right rear wheel and should open right about at the 8 o'clock mark on the oil temperature gauge. I watch the temp gauge when the car is first warming up and regularly see the gauge get to the 8 o'clock mark and then drop noticeably as the "cold" oil from the isolated oil cooler lines gets drawn in with the opening of the thermostat.
You should also be able to feel a temperature difference on the front right fender a bit behind and below the head lamp. This is where the oil cooler is mounted and this part of the fender should be warmer to the touch then the other parts of the fender, or front hood, once the thermostat is open and the warm oil is flowing.
Finally, there is a two-stage fan on the oil cooler. When the temperature gets around the 9 o'clock point on the oil temperature gauge the oil cooler fan should kick in. You may be able to hear it from outside the car in the area of the front right fender. You can alos place your hand under the right front fender/bumper just in front of the right front wheel and feel the air blowing down.
Up around the 10 o'clock mark on the oil temperature gauge the fan should kick into high speed and you should definitely be able to feel that air blowing.
The thermostat insert can be replaced if it has gone bad.
The oil cooler fan has a temperature sensor, a ballast resistor and a relay. The sensor and resistor are mounted at the cooler. The relay is in the fuse panel. The relay is easy to check as you can swap it with the AC cooler fan relay.
Check the functioning and if you need diagrams, part numbers, etc you can post back and we can provide more input.
Cheers
- The oil level
- The thermostat
- The oil cooler
It's unlikely that your oil level is low enough to effect the cooling capacity, but it's worth checking.
The thermostat is in front of the right rear wheel and should open right about at the 8 o'clock mark on the oil temperature gauge. I watch the temp gauge when the car is first warming up and regularly see the gauge get to the 8 o'clock mark and then drop noticeably as the "cold" oil from the isolated oil cooler lines gets drawn in with the opening of the thermostat.
You should also be able to feel a temperature difference on the front right fender a bit behind and below the head lamp. This is where the oil cooler is mounted and this part of the fender should be warmer to the touch then the other parts of the fender, or front hood, once the thermostat is open and the warm oil is flowing.
Finally, there is a two-stage fan on the oil cooler. When the temperature gets around the 9 o'clock point on the oil temperature gauge the oil cooler fan should kick in. You may be able to hear it from outside the car in the area of the front right fender. You can alos place your hand under the right front fender/bumper just in front of the right front wheel and feel the air blowing down.
Up around the 10 o'clock mark on the oil temperature gauge the fan should kick into high speed and you should definitely be able to feel that air blowing.
The thermostat insert can be replaced if it has gone bad.
The oil cooler fan has a temperature sensor, a ballast resistor and a relay. The sensor and resistor are mounted at the cooler. The relay is in the fuse panel. The relay is easy to check as you can swap it with the AC cooler fan relay.
Check the functioning and if you need diagrams, part numbers, etc you can post back and we can provide more input.
Cheers
04-28-2009, 12:50 PM
#3
Also, the user manual indicates that it is okay to see the low pressure warning lamp come on occasionally when the car is hot. It would make me uncomfortable, but if it's rare, it may not be an issue.
04-28-2009, 03:45 PM
#4
Professor of Pending Projects
Rennlist Member
Rennlist Member
I'd check:
It's unlikely that your oil level is low enough to effect the cooling capacity, but it's worth checking.
The thermostat is in front of the right rear wheel and should open right about at the 8 o'clock mark on the oil temperature gauge. I watch the temp gauge when the car is first warming up and regularly see the gauge get to the 8 o'clock mark and then drop noticeably as the "cold" oil from the isolated oil cooler lines gets drawn in with the opening of the thermostat.
You should also be able to feel a temperature difference on the front right fender a bit behind and below the head lamp. This is where the oil cooler is mounted and this part of the fender should be warmer to the touch then the other parts of the fender, or front hood, once the thermostat is open and the warm oil is flowing.
Finally, there is a two-stage fan on the oil cooler. When the temperature gets around the 9 o'clock point on the oil temperature gauge the oil cooler fan should kick in. You may be able to hear it from outside the car in the area of the front right fender. You can alos place your hand under the right front fender/bumper just in front of the right front wheel and feel the air blowing down.
Up around the 10 o'clock mark on the oil temperature gauge the fan should kick into high speed and you should definitely be able to feel that air blowing.
The thermostat insert can be replaced if it has gone bad.
The oil cooler fan has a temperature sensor, a ballast resistor and a relay. The sensor and resistor are mounted at the cooler. The relay is in the fuse panel. The relay is easy to check as you can swap it with the AC cooler fan relay.
Check the functioning and if you need diagrams, part numbers, etc you can post back and we can provide more input.
Cheers
- The oil level
- The thermostat
- The oil cooler
- The oil cooler fan
It's unlikely that your oil level is low enough to effect the cooling capacity, but it's worth checking.
The thermostat is in front of the right rear wheel and should open right about at the 8 o'clock mark on the oil temperature gauge. I watch the temp gauge when the car is first warming up and regularly see the gauge get to the 8 o'clock mark and then drop noticeably as the "cold" oil from the isolated oil cooler lines gets drawn in with the opening of the thermostat.
You should also be able to feel a temperature difference on the front right fender a bit behind and below the head lamp. This is where the oil cooler is mounted and this part of the fender should be warmer to the touch then the other parts of the fender, or front hood, once the thermostat is open and the warm oil is flowing.
Finally, there is a two-stage fan on the oil cooler. When the temperature gets around the 9 o'clock point on the oil temperature gauge the oil cooler fan should kick in. You may be able to hear it from outside the car in the area of the front right fender. You can alos place your hand under the right front fender/bumper just in front of the right front wheel and feel the air blowing down.
Up around the 10 o'clock mark on the oil temperature gauge the fan should kick into high speed and you should definitely be able to feel that air blowing.
The thermostat insert can be replaced if it has gone bad.
The oil cooler fan has a temperature sensor, a ballast resistor and a relay. The sensor and resistor are mounted at the cooler. The relay is in the fuse panel. The relay is easy to check as you can swap it with the AC cooler fan relay.
Check the functioning and if you need diagrams, part numbers, etc you can post back and we can provide more input.
Cheers
04-28-2009, 07:21 PM
#6
Rennlist Member
This is all true, but I would check to be sure that your cooling fans are working properly. When the car is hot, confirm that the cooling fans are running (Right side is the oil cooler, Left is the A/C).
Another thing to try is if you put on the A/C, it forces the oil cooling fan to function too. Search for Oil Cooling Fan on search. There is a lot of discussion on making this work right.
Another thing to try is if you put on the A/C, it forces the oil cooling fan to function too. Search for Oil Cooling Fan on search. There is a lot of discussion on making this work right.
04-29-2009, 12:25 AM
#7
Racer
Thread Starter
guys thanks for the feedback so far, i will check and report back.
i always have air con on.
what i worried about mostly is the temp keep creeping up, hence the warning light come on pretty much every time. i will take her out today and see what happen.
thanks
tenn
i always have air con on.
what i worried about mostly is the temp keep creeping up, hence the warning light come on pretty much every time. i will take her out today and see what happen.
thanks
tenn
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08-25-2009, 12:42 AM
#8
Racer
Thread Starter
Hi guys
just want to report back.
Problem solve! clog oil line. clean the oil cooler and replace with new oil line. Temp dont even go half way now even in hot and heavy traffic in Bangkok.
many thanks
just want to report back.
Problem solve! clog oil line. clean the oil cooler and replace with new oil line. Temp dont even go half way now even in hot and heavy traffic in Bangkok.
many thanks
