Whitaker717 Posted Wednesday at 05:16 PM Author Share Posted Wednesday at 05:16 PM 15 minutes ago, 75sv1 said: OK, I'm in Indiana. So, basically, the same weather. It would be OK to run a 205 F. I still prefer a 193 to 197F. My Xjs run about 205 F in the Summertime. Once your T-stat is fully open, your system will rise to its cooling efficiency level or Temp. So, the T-Stat sort of control the low side of the Temp. What I am hoping, is your T-Stat is in Failed Open or broke apart. Thus in Failed open mode. So, the oil is not getting warm to hot enough to boil off water. So, possibly adding to much moister into the blow by or emissions. Its a stretch. Check your oil. Is it clear or even a bit off color, or dark brown or even black? Then ok. If milky brown, then it is getting water in it. I'd check the spark plugs. I might try a Valve Cover breather for a temp fix. Still, be aware it might affect Idle and acceleration. Any t stat reccomendations? Link to comment Share on other sites More sharing options...
75sv1 Posted Wednesday at 05:32 PM Share Posted Wednesday at 05:32 PM Dealership if you can. Not sure if Stant is any good anymore. There is a new vender Colorstat. Not sure on it though. Some might be made in the US. If you use EBay, then a Carrol. I do have a few. Do you have a Federated Parts store around you? I am not sure what they carry. Robert Shaw is being produced again. Not sure of the quality. I did buy a Stewart from the same company. Stewart is for High Flow water pumps. See if others have a recommendation. I might be able to spare a Carrol or an ASG. Link to comment Share on other sites More sharing options...
Whitaker717 Posted Wednesday at 06:16 PM Author Share Posted Wednesday at 06:16 PM 43 minutes ago, 75sv1 said: Dealership if you can. Not sure if Stant is any good anymore. There is a new vender Colorstat. Not sure on it though. Some might be made in the US. If you use EBay, then a Carrol. I do have a few. Do you have a Federated Parts store around you? I am not sure what they carry. Robert Shaw is being produced again. Not sure of the quality. I did buy a Stewart from the same company. Stewart is for High Flow water pumps. See if others have a recommendation. I might be able to spare a Carrol or an ASG. I appreciate it. I will tackle it when it gets a bit warmer. Lol. Link to comment Share on other sites More sharing options...
AZJeff Posted Wednesday at 07:38 PM Share Posted Wednesday at 07:38 PM 3 hours ago, Whitaker717 said: Any good recommendations for a 195 degree thermostat or higher? Lots of guys claim the only thermostat worth buying for the 4.0 is Mopar OEM, but I have had NO problems using the "Motorad" brand from Rock Auto. Whatever brand you choose, make sure it has a "jiggle pin" hole in the flange of the thermostat to aid in "burping" the cooling system. If you cannot find one with a jiggle pin hole, and small (1/16") hole drilled near the perimeter of the thermostat flange can be made. Then make sure you orient the thermostat with this jiggle pin hole on the "12 o'clock" position when installing it in the head. Link to comment Share on other sites More sharing options...
Eagle_SX4 Posted Wednesday at 08:35 PM Share Posted Wednesday at 08:35 PM 53 minutes ago, AZJeff said: make sure it has a "jiggle pin" hole in the flange of the thermostat to aid in "burping" the cooling system I have found the best way to make sure the engine block is all filled up is to remove the smaller hose from the thermostat housing and fill from there. Filling from there will bypass the thermostat, filling the block completely. Link to comment Share on other sites More sharing options...
Whitaker717 Posted Wednesday at 08:54 PM Author Share Posted Wednesday at 08:54 PM 18 minutes ago, Eagle_SX4 said: I have found the best way to make sure the engine block is all filled up is to remove the smaller hose from the thermostat housing and fill from there. Filling from there will bypass the thermostat, filling the block completely. That would be a whole other issue for me. Burping a closed system. Lol. I’ve seen it done but never tried it. Seems like people jack the back up really high. Not sure that’s the correct way or not Link to comment Share on other sites More sharing options...
Eagle_SX4 Posted Wednesday at 09:13 PM Share Posted Wednesday at 09:13 PM 16 minutes ago, Whitaker717 said: Seems like people jack the back up really high. That is if they are filling the block through the temp sending unit which is at the back of the engine. There is no jacking required when filling from the front because it is already the highest point. Link to comment Share on other sites More sharing options...
Pete M Posted Thursday at 01:35 AM Share Posted Thursday at 01:35 AM 4 hours ago, Eagle_SX4 said: That is if they are filling the block through the temp sending unit which is at the back of the engine. no one is filling from that tiny hole. at least I hope not. it is used for burping and is conveniently located exactly where bubbles like to stay. but if you have bubbles there, it should read too hot, not too cold. Link to comment Share on other sites More sharing options...
Whitaker717 Posted Thursday at 01:49 PM Author Share Posted Thursday at 01:49 PM 12 hours ago, Pete M said: no one is filling from that tiny hole. at least I hope not. it is used for burping and is conveniently located exactly where bubbles like to stay. but if you have bubbles there, it should read too hot, not too cold. Is there a video or tutorial Pete somewhere that shows how to do it? I will try it when it gets a bit warmer. Do people fill from that small tube usually or just pour in the bottle? Link to comment Share on other sites More sharing options...
Pete M Posted Thursday at 02:47 PM Share Posted Thursday at 02:47 PM always pick a hose, undo it, and fill from there. there might be a writeup on bleeding the system in the link in my signature. it's pretty straight forward. park the truck downhill, lowly undo the sensor juuuust enough for air to escape while the cold engine is running. do not do this if the engine is hot because there's a risk of completely unscrewing the sensor and you don't want a hot coolant shower. :L a variation on that is to completely remove the sensor while filling from a hose and hold that hose higher than the sensor opening so eventually coolant will come out the sensor hole. Link to comment Share on other sites More sharing options...
Whitaker717 Posted Thursday at 03:17 PM Author Share Posted Thursday at 03:17 PM 29 minutes ago, Pete M said: always pick a hose, undo it, and fill from there. there might be a writeup on bleeding the system in the link in my signature. it's pretty straight forward. park the truck downhill, lowly undo the sensor juuuust enough for air to escape while the cold engine is running. do not do this if the engine is hot because there's a risk of completely unscrewing the sensor and you don't want a hot coolant shower. :L a variation on that is to completely remove the sensor while filling from a hose and hold that hose higher than the sensor opening so eventually coolant will come out the sensor hole. How much coolant do you use Pete? Link to comment Share on other sites More sharing options...
Whitaker717 Posted Thursday at 03:17 PM Author Share Posted Thursday at 03:17 PM 19 hours ago, AZJeff said: Lots of guys claim the only thermostat worth buying for the 4.0 is Mopar OEM, but I have had NO problems using the "Motorad" brand from Rock Auto. Whatever brand you choose, make sure it has a "jiggle pin" hole in the flange of the thermostat to aid in "burping" the cooling system. If you cannot find one with a jiggle pin hole, and small (1/16") hole drilled near the perimeter of the thermostat flange can be made. Then make sure you orient the thermostat with this jiggle pin hole on the "12 o'clock" position when installing it in the head. Is the 205 thermostat overkill for these trucks or should I use one of those. Link to comment Share on other sites More sharing options...
AZJeff Posted Thursday at 03:30 PM Share Posted Thursday at 03:30 PM 11 minutes ago, Whitaker717 said: Is the 205 thermostat overkill for these trucks or should I use one of those. Factory is 195* Link to comment Share on other sites More sharing options...
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