Hey all,
So I just bought a 2007 trailblazer and overall it is in very good condition. Has 160k miles. Unfortunately, it didn't come with any previous service records. Anyways, when I got it I noticed that upon starting, the fan is engaged and runs extremely loud and louder when RPMs go up. This is with a cold engine. After getting up to speed on the hwy (70mph) for a bit and the engine warms up, this loud jet engine sound goes away and stays away even with low speed driving. During the whole process the temp gauge never goes over 210 but definitely gets up there pretty quick (maybe this is normal?). Ive been doing some research and see that these TBs have fan clutch and water pump problems. When I pull and swap relays 45 and 46 it has the same result (not sure if i'm checking the relays correctly). I am assuming that the fan clutch is failing in the engaged position. What do you think?
Also, I read that not dealing with this problem will put extra stress on the water pump causing it to fail soon after. I am going up into the mountains in a couple days and I don't want to have any problems as my wife and dogs will be with me and we have REALLY bad road conditions. Fortunately I can get all the OEM parts (new fan clutch, new water pump, might as well do new Tstat, and new Sbelt as well) before my trip up there but I just want to see if anyone has any insight on this before I replace anything for no reason. I want to get this thing running in top shape and I feel that it is not doing so right now.
Im going to take it up to Orielly right now to scan it and see if any codes pop up but I have personally seen NO check engine light. (If it aint broke dont fix it?)
Any insight or advice is very much appreciated. Im really happy to have this truck and I want to keep it in the best condition possible!
So I just bought a 2007 trailblazer and overall it is in very good condition. Has 160k miles. Unfortunately, it didn't come with any previous service records. Anyways, when I got it I noticed that upon starting, the fan is engaged and runs extremely loud and louder when RPMs go up. This is with a cold engine. After getting up to speed on the hwy (70mph) for a bit and the engine warms up, this loud jet engine sound goes away and stays away even with low speed driving. During the whole process the temp gauge never goes over 210 but definitely gets up there pretty quick (maybe this is normal?). Ive been doing some research and see that these TBs have fan clutch and water pump problems. When I pull and swap relays 45 and 46 it has the same result (not sure if i'm checking the relays correctly). I am assuming that the fan clutch is failing in the engaged position. What do you think?
Also, I read that not dealing with this problem will put extra stress on the water pump causing it to fail soon after. I am going up into the mountains in a couple days and I don't want to have any problems as my wife and dogs will be with me and we have REALLY bad road conditions. Fortunately I can get all the OEM parts (new fan clutch, new water pump, might as well do new Tstat, and new Sbelt as well) before my trip up there but I just want to see if anyone has any insight on this before I replace anything for no reason. I want to get this thing running in top shape and I feel that it is not doing so right now.
Im going to take it up to Orielly right now to scan it and see if any codes pop up but I have personally seen NO check engine light. (If it aint broke dont fix it?)
Any insight or advice is very much appreciated. Im really happy to have this truck and I want to keep it in the best condition possible!