Could the shop have messed something up changing radiator?

Asked by Nov 28, 2015 at 12:13 PM about the 1996 GMC Jimmy

Question type: Maintenance & Repair

Had the radiator changed on my 96 jimmy a few weeks ago and now on a cold start there is a sound similar to fan blade hitting shroud.  I checked fan while running and that doesn't seem to be the problem.  It only does it when cold and sometimes it's more noticeable when put into reverse.  Any ideas?  Will be taking it back to shop of course, just doing some research till then.

8 Answers


If your motor mounts are shot then the engine could shift causing the fan to hit the shroud.

What I don't understand though is that it only does it when the engine is cold. Why would this be?


Fast idle?

Normal cold idle. Not sure I would call it fast but being cold, little faster than usual. I watched it yesterday and I couldn't see the fan hitting shroud. It's weird, at times it's more noticeable when put in reverse which may lead a person to believe transmission issue but it will do it just sitting in park. All only when cold. (starting in the morning after sitting through the night) This started less then 24 hours after having radiator changed. Related or coincidence? I don't know, but odd.


It's very common for weak motor mounts to let the fan hit the shroud. Only when cold sounds odd. I like keeping it simple. It sounds like a fan hitting the shroud, they had to remove the shroud so it should be the shroud. Maybe they didn't line it up right?

After going out again this morning to check it out, it is the fan hitting the shroud. Did some more research and came to the conclusion that it could be one of a few things. Loose shroud, fan clutch, water pump or motor mounts. Crossing my fingers for just a loose shroud as that is probably the easiest and cheapest. Sounds like it could likely be the fan clutch if not loose shroud. Because it only does it on a cold start it sounds like motor mounts might be ruled out.


When the engine is cold it idles faster which could shift the engine enough to make this noise . The thing to do is raise the hood and have someone start it while observing the fan and shroud with a good flashlight.


The shroud just didn't get put back on right. Or the radiator didn't get pushed in all the way. Never seen a fan clutch go bad and do that.

Your Answer

Add photo

Related Questions


Looking for a Used Jimmy in your area?

CarGurus has 255 nationwide Jimmy listings starting at $4,500.


Search GMC Jimmy Questions

GMC Jimmy Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 280
#2 tennisshoes
Reputation 240
#3 1oldman
Reputation 220
View All

Related Models For Sale

Used Chevrolet Blazer
1,175 listings starting at $700
Used GMC Sierra 1500
856 Great Deals out of 66,786 listings starting at $1,995
Used Ford Bronco
162 listings
Used GMC Yukon
373 Great Deals out of 17,169 listings starting at $2,500
Used Chevrolet S-10
11 Great Deals out of 1,358 listings starting at $1,595
Used Chevrolet Tahoe
568 Great Deals out of 27,717 listings starting at $1,999
Used Ford Explorer
816 Great Deals out of 75,234 listings starting at $750
Used GMC Suburban
134 listings starting at $1,450
Used Ford F-150
2,316 Great Deals out of 210,529 listings starting at $1,499
Used GMC Sonoma
9 Great Deals out of 487 listings starting at $2,500
Used Honda Accord
707 Great Deals out of 88,066 listings starting at $699

Used Cars For Sale