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Off-RoadingDiscussions specifically related to modifying and driving your Toyota truck/SUV off the pavement, including trip reports.
This is a discussion thread titled "4 Low Over-Heating Issues", within the Off-Roading forum, part of the General Forums category.
Does anyone have issues? Whenever I am in 4 low or 4 double low my engine overheats rather quickly. It did this a few weeks ago so I cleaned out the radiator, but there was hardly any mud caked in the fins. Last night, it started over heating again. Anyone have any ideas or encounters like this?
its possible that your radiator is old, and it overheats easily
I had that issue, when i've replaced my radiator (about $120) - since then never had issues.
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2006 Toyota Sequoia Limited 4x4 w/ lxr package, 7008 navi, rear entartaiment system, 20" x-sp enkei
2001 Toyota Tundra SR5 4x4 Supercharged w/ lots of miles on it!
Have you ever actually flushed the rad? Things might just be gunked up by now including your water pump...or thermo. You could try replacing that or just the rad from a junk yard or something. Maybe the lack of moving air over the rad could be causing a problem.
Or it could be due to the underdrive pulley not spinning the water pump fast enough...which both you and I have
__________________ David~2001 Toyota Tundra 4X4 TRD SR5~SSautochrome headers~Single 2.5" exhaust w/ Flowmaster 50 series delta flow muffler~K&N FIPK intake system w/True-flow filter~ASP underdrive pulley~Hellwig Anti-Sway Bar(removed)~Powertrax No-slip~Bilstein 5100 front and rear w/AAL~Diff breather mod~255/85 BFG M/T on Wheelers Black Steelies Type B~Custom Rocksliders~Skid Row front skid plate~Custom Transfer case skid plate
Have you ever actually flushed the rad? Things might just be gunked up by now including your water pump...or thermo. You could try replacing that or just the rad from a junk yard or something. Maybe the lack of moving air over the rad could be causing a problem.
Or it could be due to the underdrive pulley not spinning the water pump fast enough...which both you and I have
I was thinking about the under drive pulley part, but it has never happened since my truck was SAS'd. It happened once about 2-3 years ago and a muddy radiator was the culprit. And now all of a sudden its doing it again.
I was thinking about the under drive pulley part, but it has never happened since my truck was SAS'd. It happened once about 2-3 years ago and a muddy radiator was the culprit. And now all of a sudden its doing it again.
Huh. How many miles are on your truck? How does the fluid look? My only guess is maybe the radiator is a little clogged up possibly from circulating contaminated water/coolant. It might just be time for a new radiator. You might be able to pick one up for really cheap at a junk yard from a newer year Tundra and swap it out.
I'll ask my buddy tomorrow what he thinks it may be since he is actually a mechanic. Until then maybe check to see how the fluid looks.
__________________ David~2001 Toyota Tundra 4X4 TRD SR5~SSautochrome headers~Single 2.5" exhaust w/ Flowmaster 50 series delta flow muffler~K&N FIPK intake system w/True-flow filter~ASP underdrive pulley~Hellwig Anti-Sway Bar(removed)~Powertrax No-slip~Bilstein 5100 front and rear w/AAL~Diff breather mod~255/85 BFG M/T on Wheelers Black Steelies Type B~Custom Rocksliders~Skid Row front skid plate~Custom Transfer case skid plate
It sounds like the thermostat. My brothers 02' did this about a month ago, we replaced the thermo for about ~$30 and its all good now. If you want, pull the thermo out and place it in a bowl of hot water it should open up at around 180 degrees if i remember correctly. Is your fan coming on? Try the thermo first then go from there. Good luck.
__________________ 2000 Tundra TRD 4x4, 5100's, procomp wheels, 285's, 14" Magnaflow single out, Debadged, XM Satelite Radio, Push Bumper, Powertrax No-slip, Diff breather mod, clear corners
In the bed- CRF450R-
Life's a bore, am going pig hunting.....
Huh. How many miles are on your truck? How does the fluid look? My only guess is maybe the radiator is a little clogged up possibly from circulating contaminated water/coolant. It might just be time for a new radiator. You might be able to pick one up for really cheap at a junk yard from a newer year Tundra and swap it out.
I'll ask my buddy tomorrow what he thinks it may be since he is actually a mechanic. Until then maybe check to see how the fluid looks.
about 59k on the truck. the coolant looks pretty clean when i checked it the other day. New fluid and a radiator flush will be the first order of business.
Quote:
Originally Posted by Derek24
It sounds like the thermostat. My brothers 02' did this about a month ago, we replaced the thermo for about ~$30 and its all good now. If you want, pull the thermo out and place it in a bowl of hot water it should open up at around 180 degrees if i remember correctly. Is your fan coming on? Try the thermo first then go from there. Good luck.
Thanks, I will look into that also. I am rarely in 4 low, so I am not too worried about it. As long as it doesn't start doing this under normal driving conditions, I will be good.
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4 Low Over-Heating Issues
David~2001 Toyota Tundra 4X4 TRD SR5~SSautochrome headers~Single 2.5" exhaust w/ Flowmaster 50 series delta flow muffler~K&N FIPK intake system w/True-flow filter~ASP underdrive pulley~Hellwig Anti-Sway Bar(removed)~Powertrax No-slip~Bilstein 5100 front and rear w/AAL~Diff breather mod~255/85 BFG M/T on Wheelers Black Steelies Type B~Custom Rocksliders~Skid Row front skid plate~Custom Transfer case skid plate
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