i have an 87 2 door with the 2.8 in it. it has been getting up to 3/4temp on the guage. it is like 100+ degrees but should this be happening? it has fluid in it and isnt leaking (that i can see). thermostat bad? water pump? or is it just to damn hot out side? i made a 2 hr trip over the weekend and it didnt get into the red but like i said it was 3/4 the way up. i didnt have to stop or turn the heat on tho-

 

For reference, are there any numbers on your temperature gauge face? Have you checked the temperature with other means (infrared temperature probe, etc)?

Have you cleaned the exterior of the radiator (and a/c condenser if equiped)?

 

iv just gotten the blazer, so i havent done much. i think the half way mark is labled 210. max might be 245 ill have to look after work. it seems fine today. not going above the half mark. ill def flush the rad this weekend to be sure. any info on cleaning the a/c cond.? thnx for the reply

 

So 3/4 would be somewhere around 230. That is high.

As far as cleaning out the condenser and the exterior of the radiator, an air hose can be used, just don't get too close to the fins. What I use and think works best is a pressure washer dialed back quite a bit, but again, you can't get close to the fins or they'll just bend over. The grill often has to be removed to get it cleaned properly.

Also, if you do find a lot of bent over fins, this is reducing air flow through the cores. These need to be straightened with a radiator comb to gain back the air flow and properly cool the engine.

 

thnx ill look into it tonight. keep the ideas coming. the bent fins seems to make sense, as i would go faster on the interstate and temp wouldnt go down yesterday

 

Probably wouldn't hurt to do a complete service (flush on the engine & replacement cap & t-stat) if you haven't already done that. Kinda hard to make any other recommendations...

 

noted. like i said i just havent had it long enough to gett all the recomended services done yet. but there coming-

 

ok i havent had time to get into the blazer yet (going to on day off tomorrow) but it runs normal with out the a/c on? any ideas?

 

Make sure your radiator cooling fan is operating properly.

 

im going to bring it to a freinds house (he is a great mechanic) tonight and start getting dirty. ill post up what we find. all these reply's are helping with where to look thnx a lot-