Cooling problem with e-fans and 34" radiator
06-03-2005, 02:11 AM
#41
I went and talked to a tech I know at the GMC dealer today....I have two more things to check now. He told me to check and make sure that everything is sealed up so all of the air the fans pull goes through the radiator and not around it, and I'm also gonna try pulling the tranny coolers I have mounted to the radiator off and see if it makes a difference. I have one mounted in front of each fan, and I'm thinking that maybe when towing uphill the coolers heat up enough to be passing hot air through the radiator, decreasing its ability to cool the engine. Do you have tranny coolers on your radiator?
06-03-2005, 02:17 AM
#42
TECH Apprentice
Join Date: Sep 2003
Location: Houston
Posts: 312
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by thunder550
Do you have tranny coolers on your radiator?
1. Sending unit is bad "telling PCM it is overheating but really not"
2. Cooloing system has crap in it and causes a clog until it just builds up enough pressure it blow buy.
3. Water pump has some kind of a problem but I have know idea why it would work sometimes and not others.
Like I said before I have put in New T-stat, New e-fans, (on all the time) New hoses, and checked all holes in radiator for blockage. So the only things I have NOT done are New radiator, New Water pump.
06-04-2005, 10:33 PM
#43
Staging Lane
Join Date: Mar 2003
Location: Moreno Valley, CA
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
Since I do not run the stock radiator that has the air to water cooler...which has the best heat transfer ratio...I decided a long time ago to also run a dual remote trans and engine oil cooler with fan...I also run the factory cooler up front....if you are going to run two filters in series make sure it flows more liquid that the stock cooler as it could restrict the oil flow to the trans...no a good thing! Reason I went with the biggest dia tubing Hayden made...right now I run with with a manual switch but will soon also have it setup with a sensor like the radiator has.
Between the front air dam and the frame...had to loose the plastic skid plate...high enough to not get hit by rocks, etc.
At work I use an infrared scanner to check actual radiator temps...would rule out a bad sensor or guage unit...also make sure that the radiator core is free of bugs as it can get plugged up in just a few days in bad areas...also suggestion to check air flow seal is a good idea...On mine since I have more air flow restriction with the huge intercooler up front which is larger than the radiator I had to seal off both sides of the headlamps with flat alum. inserts to actual help force the air through the system when above 30mph otherwise some of it would just go around everything.
Ken
Between the front air dam and the frame...had to loose the plastic skid plate...high enough to not get hit by rocks, etc.
At work I use an infrared scanner to check actual radiator temps...would rule out a bad sensor or guage unit...also make sure that the radiator core is free of bugs as it can get plugged up in just a few days in bad areas...also suggestion to check air flow seal is a good idea...On mine since I have more air flow restriction with the huge intercooler up front which is larger than the radiator I had to seal off both sides of the headlamps with flat alum. inserts to actual help force the air through the system when above 30mph otherwise some of it would just go around everything.
Ken
06-04-2005, 10:43 PM
#44
TECH Veteran
Originally Posted by (Ken)-Blown-383 4x4
Highly recommend the Robert Shaw High-Volume Thermostat...
Also, again recommend you go with a 180 thermostat....don't recommend the 160 at all...opens way to early.
Ken
Also, again recommend you go with a 180 thermostat....don't recommend the 160 at all...opens way to early.
Ken
06-04-2005, 11:18 PM
#46
TECH Veteran
Originally Posted by BlownChevy
That style T-Stat will not work on the gen III motors.
Why are stats for other vehicles $8-$11, and ours are $25-$50?
I want a 180 but can't find one under $49
06-05-2005, 02:06 AM
#48
Ours come with the whole thermostat housing and everything, can't get just the stat by itself. That's why it's more expensive.
I pulled one of the two tranny coolers off the radiator today and pulled the same hill again, this time instead of 240 I barely got over 210, so I think I found the culprit. I need to get the other tranny cooler off of the radiator and I think I will have the problem solved. Tranny gets to 200-210 or so pulling the hill, can't be good to be passing 200 degree air through the radiator. Ken - I will probably end up doing a remote mount with a fan like you did, thanks for the pics. I will keep the thread updated when I get everything finished. Thanks for the comments.
I pulled one of the two tranny coolers off the radiator today and pulled the same hill again, this time instead of 240 I barely got over 210, so I think I found the culprit. I need to get the other tranny cooler off of the radiator and I think I will have the problem solved. Tranny gets to 200-210 or so pulling the hill, can't be good to be passing 200 degree air through the radiator. Ken - I will probably end up doing a remote mount with a fan like you did, thanks for the pics. I will keep the thread updated when I get everything finished. Thanks for the comments.
06-05-2005, 10:13 AM
#49
Originally Posted by thunder550
Ours come with the whole thermostat housing and everything, can't get just the stat by itself. That's why it's more expensive.
I pulled one of the two tranny coolers off the radiator today and pulled the same hill again, this time instead of 240 I barely got over 210, so I think I found the culprit. I need to get the other tranny cooler off of the radiator and I think I will have the problem solved. Tranny gets to 200-210 or so pulling the hill, can't be good to be passing 200 degree air through the radiator. Ken - I will probably end up doing a remote mount with a fan like you did, thanks for the pics. I will keep the thread updated when I get everything finished. Thanks for the comments.
I pulled one of the two tranny coolers off the radiator today and pulled the same hill again, this time instead of 240 I barely got over 210, so I think I found the culprit. I need to get the other tranny cooler off of the radiator and I think I will have the problem solved. Tranny gets to 200-210 or so pulling the hill, can't be good to be passing 200 degree air through the radiator. Ken - I will probably end up doing a remote mount with a fan like you did, thanks for the pics. I will keep the thread updated when I get everything finished. Thanks for the comments.
