If it gets there then it just keeps going up. Happened on hot days when the electric fan wasn't working because of a bad connection. Seems like I taped up the plug on the fan side and it's been okay since. I'm not going to go tearing things apart because it isn't getting "hot enough"
Philippe - there's a specialist LPG forum here: https://www.lpgforum.co.uk/
It's not as active as here, but there are a couple of specialists/fitters who I'm sure could help you out.
It's actually bad for the engine when driving on LPG.
you'll get a lot more hydrogen which you want to remove.
Also, it's worth the check to increase MPG!
I remember it doing something negative with the valves as well.... for those that convert standard petrol engine cars to LPG and only do the LPG conversion without making the necessary yet more expensive changes to the engines to make them last. They just convert...and drive it into the ground and get another car. Said..but I saw that a LOT living in Australia.
It does indeed damage the valves on some motors. LPG doesn't have the additives that you can find in regular gasoline. I opted for a valve care systemen, although I was told it didn't need one.
LPG doesn't have any lubricant in it to help the valves transfer heat to their seats and tends to warp them. Also the rings tend to run dry resulting in more cylinder wear. The LPG rigs I've seen on forklifts have coolant heated regulators that might help vaporize the gas and create better combustion, so coolant temp is important. Some LPG engines need top cylinder oilers to help combat ring wear.
The whole reason for a thermostat is to make the engine run constantly at it's set temperature and not less than that....ever. A 195*F thermostat will make the 4.0 run at 210*F at idle and not less than 195*F at driving speed. I'd have to agree that your thermostat is stuck open.
It's actually bad for the engine when driving on LPG.
you'll get a lot more hydrogen which you want to remove.
Also, it's worth the check to increase MPG!
Any excess hydrogen should be the first thing that burns off! Hydrogen burns clean and that's the main reason for using it. LPG is basically methane and hydrogen mixed.
I just went through a few things to try to get my fuel mileage up to something better than the 13.x to 14.x mpg range. New O2 sensor, plugs, wires, cap, rotor, clean throttle body, air filter, etc. The last two things I did was to reset the ECU and replace the thermostat.
Before I changed the thermostat, my temp gauge would drop to the 155 mark (halfway between 100 & 210) when driving on the highway in cool weather. Since I changed the thermostat, my gauge stays just under the 210 mark as shown in the attached pic, even when driving at highway speed in near freezing temperature.
The first full tank I ran through after the stat change came out at 18.5 mpg. The second tank was 18.3. My Jeep usually got less than 14 mpg and occasionally less than 13 mpg before the stat change.
maybe a Mopar T-Stat change is what I need for mine too... she consistently gets 14-15 mpg over nearly the full tank averaged out and calculated the larger tires on her. Of course that is not nearly all highway.. that's most of the tank driving under 50 mph.
I changed mine about 3 years ago but don't believe it was a Mopar branded t-stat.... does the brand on the t-stat housing make any difference?
Hello everyone. My EU cherokee 4.0 92' has 270.000 km's (170k ish miles). It runs on LPG and does so very well.
It does around 12 mpg, which feels pretty bad. Also, it's like 40°F outside and the engine does not warm up to 210°F (while driving)*.
The engine coolant looks pretty brown, so I'm going to flush it after the winter.
I'll be checking, probably replacing, the thermostat. Does that sound like a good idea?
What do you recommend to get the engine up to temperature?
How are you checking your coolant? Are you just looking in the over flow / recovery bottle? Or, are you removing the radiator cap when the engine is cold?
Hello everyone. My EU cherokee 4.0 92' has 270.000 km's (170k ish miles). It runs on LPG and does so very well.
It does around 12 mpg, which feels pretty bad. Also, it's like 40°F outside and the engine does not warm up to 210°F (while driving)*.
The engine coolant looks pretty brown, so I'm going to flush it after the winter.
I'll be checking, probably replacing, the thermostat. Does that sound like a good idea?
What do you recommend to get the engine up to temperature?
I dont know what you have access to parts stores wise over there....but what you need to get yourself is an antifreeze tester. They are cheap and will tell you what temperature range your current coolant will protect, both hot and cold. This is more vital than many may think / realise.... if the properties degrade too far, it can start to cause your engine coolant system problems.
You're running 255 with a 60mm sidewall height?.... are you sure it's not a 255/75/r15?
Sidewall height on a 255/60r15 is 153 mm.
On a 255/60r15” tire, 255 is the tread face width in millimeters and 60 is the percentage of the tread width that is the sidewall height. 255 x 60% (0.60) = 153 mm or 6.02 inches.
If the tires actually had 60 mm sidewalls (2.4 inches) the overall tire diameter would be 19.7 inches (donuts for sure). 255/60r15s are 27.04 inches in diameter.
Stock size tires on my ‘95 Cherokee were 215/75r15 which are 27.7 inches in diameter, so Philippe is riding about 0.33 inches shorter than stock size tires.
