Erratic temp guage
Good evening all. I have appeared here before with a erratic temp
gauge. After confirming that the engine block is not plugged, having a new correct flow water pump installed, a recent radiator, new thermostat, twice this week, and this evening a new temp sending unit, my gauge still will not sit at 210. The old sending unit was corroded, and fell apart when I removed it. I knew it was bad. The gauge used to flucuate between 210 and 260. Up and down constantly. Now it goes up and down between 210 and 235. When I first start it and let it warm up, it hangs around 210, and when I start driving, it begins to move. Why. Thanks, Greg |
Re: Erratic temp guage
That sounds within the normal range. My 258 runs right around there
too. The faster you go, the more heat you create and energy you use. On a hot summer day, I get borderline overheating and cap burps when I try to go over 70 mph for any extended time. That is due to my winch and lights interfering with the flow to the rad. How's the oil level? I find mine runs a bit hotter when low a quart of oil or when in need of a change. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) jerryg wrote: > > Good evening all. I have appeared here before with a erratic temp > gauge. After confirming that the engine block is not plugged, having a > new correct flow water pump installed, a recent radiator, new > thermostat, twice this week, and this evening a new temp sending unit, > my gauge still will not sit at 210. The old sending unit was corroded, > and fell apart when I removed it. I knew it was bad. The gauge used to > flucuate between 210 and 260. Up and down constantly. Now it goes up > and down between 210 and 235. When I first start it and let it warm up, > it hangs around 210, and when I start driving, it begins to move. Why. > > Thanks, > > Greg |
Re: Erratic temp guage
That sounds within the normal range. My 258 runs right around there
too. The faster you go, the more heat you create and energy you use. On a hot summer day, I get borderline overheating and cap burps when I try to go over 70 mph for any extended time. That is due to my winch and lights interfering with the flow to the rad. How's the oil level? I find mine runs a bit hotter when low a quart of oil or when in need of a change. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) jerryg wrote: > > Good evening all. I have appeared here before with a erratic temp > gauge. After confirming that the engine block is not plugged, having a > new correct flow water pump installed, a recent radiator, new > thermostat, twice this week, and this evening a new temp sending unit, > my gauge still will not sit at 210. The old sending unit was corroded, > and fell apart when I removed it. I knew it was bad. The gauge used to > flucuate between 210 and 260. Up and down constantly. Now it goes up > and down between 210 and 235. When I first start it and let it warm up, > it hangs around 210, and when I start driving, it begins to move. Why. > > Thanks, > > Greg |
Re: Erratic temp guage
That sounds within the normal range. My 258 runs right around there
too. The faster you go, the more heat you create and energy you use. On a hot summer day, I get borderline overheating and cap burps when I try to go over 70 mph for any extended time. That is due to my winch and lights interfering with the flow to the rad. How's the oil level? I find mine runs a bit hotter when low a quart of oil or when in need of a change. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) jerryg wrote: > > Good evening all. I have appeared here before with a erratic temp > gauge. After confirming that the engine block is not plugged, having a > new correct flow water pump installed, a recent radiator, new > thermostat, twice this week, and this evening a new temp sending unit, > my gauge still will not sit at 210. The old sending unit was corroded, > and fell apart when I removed it. I knew it was bad. The gauge used to > flucuate between 210 and 260. Up and down constantly. Now it goes up > and down between 210 and 235. When I first start it and let it warm up, > it hangs around 210, and when I start driving, it begins to move. Why. > > Thanks, > > Greg |
Re: Erratic temp guage
Hi Mike, Well I just changed the oil. And It starts moving on me while
sitting in the drive way. But it takes a few minutes. I also had the head gasket done about a month ago. It hovers around 210, but slowly goes up to 235, 240 or so and then comes back down. It doesn't over heat. My heat works great. I drive 40 miles to work one way in it. I have 31 inch tires. When I arrive at work I notice no sounds related to overheating like hissing or burping. Would the temp fluctuate up and down or could it be my gauge acting up?? It concerns me a little. My fan clutch is operating properly. I'm confused!!!!! Thanks Greg 95 YJ 4.0 Mike Romain wrote: > That sounds within the normal range. My 258 runs right around there > too. > > The faster you go, the more heat you create and energy you use. On a > hot summer day, I get borderline overheating and cap burps when I try to > go over 70 mph for any extended time. That is due to my winch and > lights interfering with the flow to the rad. > > How's the oil level? I find mine runs a bit hotter when low a quart of > oil or when in need of a change. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > jerryg wrote: > > > > Good evening all. I have appeared here before with a erratic temp > > gauge. After confirming that the engine block is not plugged, having a > > new correct flow water pump installed, a recent radiator, new > > thermostat, twice this week, and this evening a new temp sending unit, > > my gauge still will not sit at 210. The old sending unit was corroded, > > and fell apart when I removed it. I knew it was bad. The gauge used to > > flucuate between 210 and 260. Up and down constantly. Now it goes up > > and down between 210 and 235. When I first start it and let it warm up, > > it hangs around 210, and when I start driving, it begins to move. Why. > > > > Thanks, > > > > Greg |
Re: Erratic temp guage
Hi Mike, Well I just changed the oil. And It starts moving on me while
sitting in the drive way. But it takes a few minutes. I also had the head gasket done about a month ago. It hovers around 210, but slowly goes up to 235, 240 or so and then comes back down. It doesn't over heat. My heat works great. I drive 40 miles to work one way in it. I have 31 inch tires. When I arrive at work I notice no sounds related to overheating like hissing or burping. Would the temp fluctuate up and down or could it be my gauge acting up?? It concerns me a little. My fan clutch is operating properly. I'm confused!!!!! Thanks Greg 95 YJ 4.0 Mike Romain wrote: > That sounds within the normal range. My 258 runs right around there > too. > > The faster you go, the more heat you create and energy you use. On a > hot summer day, I get borderline overheating and cap burps when I try to > go over 70 mph for any extended time. That is due to my winch and > lights interfering with the flow to the rad. > > How's the oil level? I find mine runs a bit hotter when low a quart of > oil or when in need of a change. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > jerryg wrote: > > > > Good evening all. I have appeared here before with a erratic temp > > gauge. After confirming that the engine block is not plugged, having a > > new correct flow water pump installed, a recent radiator, new > > thermostat, twice this week, and this evening a new temp sending unit, > > my gauge still will not sit at 210. The old sending unit was corroded, > > and fell apart when I removed it. I knew it was bad. The gauge used to > > flucuate between 210 and 260. Up and down constantly. Now it goes up > > and down between 210 and 235. When I first start it and let it warm up, > > it hangs around 210, and when I start driving, it begins to move. Why. > > > > Thanks, > > > > Greg |
Re: Erratic temp guage
Hi Mike, Well I just changed the oil. And It starts moving on me while
sitting in the drive way. But it takes a few minutes. I also had the head gasket done about a month ago. It hovers around 210, but slowly goes up to 235, 240 or so and then comes back down. It doesn't over heat. My heat works great. I drive 40 miles to work one way in it. I have 31 inch tires. When I arrive at work I notice no sounds related to overheating like hissing or burping. Would the temp fluctuate up and down or could it be my gauge acting up?? It concerns me a little. My fan clutch is operating properly. I'm confused!!!!! Thanks Greg 95 YJ 4.0 Mike Romain wrote: > That sounds within the normal range. My 258 runs right around there > too. > > The faster you go, the more heat you create and energy you use. On a > hot summer day, I get borderline overheating and cap burps when I try to > go over 70 mph for any extended time. That is due to my winch and > lights interfering with the flow to the rad. > > How's the oil level? I find mine runs a bit hotter when low a quart of > oil or when in need of a change. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > jerryg wrote: > > > > Good evening all. I have appeared here before with a erratic temp > > gauge. After confirming that the engine block is not plugged, having a > > new correct flow water pump installed, a recent radiator, new > > thermostat, twice this week, and this evening a new temp sending unit, > > my gauge still will not sit at 210. The old sending unit was corroded, > > and fell apart when I removed it. I knew it was bad. The gauge used to > > flucuate between 210 and 260. Up and down constantly. Now it goes up > > and down between 210 and 235. When I first start it and let it warm up, > > it hangs around 210, and when I start driving, it begins to move. Why. > > > > Thanks, > > > > Greg |
Re: Erratic temp guage
On 26 Dec 2006 17:00:54 -0800, "jerryg" <Gregginn7@msn.com> wrote:
>Good evening all. I have appeared here before with a erratic temp >gauge. After confirming that the engine block is not plugged, having a >new correct flow water pump installed, a recent radiator, new >thermostat, twice this week, and this evening a new temp sending unit, >my gauge still will not sit at 210. The old sending unit was corroded, >and fell apart when I removed it. I knew it was bad. The gauge used to >flucuate between 210 and 260. Up and down constantly. Now it goes up >and down between 210 and 235. When I first start it and let it warm up, >it hangs around 210, and when I start driving, it begins to move. Why. > What model is it? I had a similar problem on my '77 Cherokee (195 degree thermostat). In town, summer or winter, A/C or not, gauge read at the lower end of the green zone (195 or so). At higher speeds, it would run higher. In summer, with the A/C on and driving on the freeway, it would run near the end of the green range (but not actually overheat). It didn't used to get that hot unless I was towing down a crowded highway in hot midday sun. I replaced the radiator with an identical Modine (stock), when the old one finally quit. Same song, second verse. When that one quit last summer, I did the obvious fix-a radiator with one more row of tubes (from three rows to four-doubles cooling capacity-it's a direct square relationship). Still runs hotter at high speed (the engine has to work harder), but only slightly. Problem solved, and -DUH- it finally dawned on me-it was made for the then national speed limit of 55 mph (and the radiator size was not increased when full-time-four-wheel-drive (Quadratrac) was introduced back in the '70's (it has no two-wheel-drive capability at all). At 65-70+, ram air is no longer sufficient for the extra load placed on any engine, and more cooling is required. But I do now have a piece of cardboard covering about half the radiator during cold weather to help it heat up better. Especially since it's only a 6-minute drive to work. An oversized radiator would definitely hold your temperature down. Hope this helps. Dan >Thanks, > >Greg |
Re: Erratic temp guage
On 26 Dec 2006 17:00:54 -0800, "jerryg" <Gregginn7@msn.com> wrote:
>Good evening all. I have appeared here before with a erratic temp >gauge. After confirming that the engine block is not plugged, having a >new correct flow water pump installed, a recent radiator, new >thermostat, twice this week, and this evening a new temp sending unit, >my gauge still will not sit at 210. The old sending unit was corroded, >and fell apart when I removed it. I knew it was bad. The gauge used to >flucuate between 210 and 260. Up and down constantly. Now it goes up >and down between 210 and 235. When I first start it and let it warm up, >it hangs around 210, and when I start driving, it begins to move. Why. > What model is it? I had a similar problem on my '77 Cherokee (195 degree thermostat). In town, summer or winter, A/C or not, gauge read at the lower end of the green zone (195 or so). At higher speeds, it would run higher. In summer, with the A/C on and driving on the freeway, it would run near the end of the green range (but not actually overheat). It didn't used to get that hot unless I was towing down a crowded highway in hot midday sun. I replaced the radiator with an identical Modine (stock), when the old one finally quit. Same song, second verse. When that one quit last summer, I did the obvious fix-a radiator with one more row of tubes (from three rows to four-doubles cooling capacity-it's a direct square relationship). Still runs hotter at high speed (the engine has to work harder), but only slightly. Problem solved, and -DUH- it finally dawned on me-it was made for the then national speed limit of 55 mph (and the radiator size was not increased when full-time-four-wheel-drive (Quadratrac) was introduced back in the '70's (it has no two-wheel-drive capability at all). At 65-70+, ram air is no longer sufficient for the extra load placed on any engine, and more cooling is required. But I do now have a piece of cardboard covering about half the radiator during cold weather to help it heat up better. Especially since it's only a 6-minute drive to work. An oversized radiator would definitely hold your temperature down. Hope this helps. Dan >Thanks, > >Greg |
Re: Erratic temp guage
On 26 Dec 2006 17:00:54 -0800, "jerryg" <Gregginn7@msn.com> wrote:
>Good evening all. I have appeared here before with a erratic temp >gauge. After confirming that the engine block is not plugged, having a >new correct flow water pump installed, a recent radiator, new >thermostat, twice this week, and this evening a new temp sending unit, >my gauge still will not sit at 210. The old sending unit was corroded, >and fell apart when I removed it. I knew it was bad. The gauge used to >flucuate between 210 and 260. Up and down constantly. Now it goes up >and down between 210 and 235. When I first start it and let it warm up, >it hangs around 210, and when I start driving, it begins to move. Why. > What model is it? I had a similar problem on my '77 Cherokee (195 degree thermostat). In town, summer or winter, A/C or not, gauge read at the lower end of the green zone (195 or so). At higher speeds, it would run higher. In summer, with the A/C on and driving on the freeway, it would run near the end of the green range (but not actually overheat). It didn't used to get that hot unless I was towing down a crowded highway in hot midday sun. I replaced the radiator with an identical Modine (stock), when the old one finally quit. Same song, second verse. When that one quit last summer, I did the obvious fix-a radiator with one more row of tubes (from three rows to four-doubles cooling capacity-it's a direct square relationship). Still runs hotter at high speed (the engine has to work harder), but only slightly. Problem solved, and -DUH- it finally dawned on me-it was made for the then national speed limit of 55 mph (and the radiator size was not increased when full-time-four-wheel-drive (Quadratrac) was introduced back in the '70's (it has no two-wheel-drive capability at all). At 65-70+, ram air is no longer sufficient for the extra load placed on any engine, and more cooling is required. But I do now have a piece of cardboard covering about half the radiator during cold weather to help it heat up better. Especially since it's only a 6-minute drive to work. An oversized radiator would definitely hold your temperature down. Hope this helps. Dan >Thanks, > >Greg |
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