Hello, everybody. I am a new guy to the forum and have very little experience with Blazers. I recently agreed to replace a head gasket on my friend's '98 4.3l Blazer (a leaking freeze plug caused an overheating problem). The plan is to trade my auto skills for her babysitting skills (we both have a young daughter). I want to get more familiar with 4.3s because I have been looking for a 90-92 4.3L motor & 700r4 trans for my Suzuki/Toyota project.

Prior to tearing down the motor, I surfed the net to see whether the water pump fan threads are right or left handed. I saw both answers from people that claimed first-hand knowledge. The fan on 'my' Blazer spins CCW when facing the fan from in front of the bumper. Therefore, on my application it seemed that the threads should be right-handed. This turned out to be the case.

Question - Do some Blazers have the serpentine belt routed so that the fan spins clockwise? Is so, do these have left-hand threads on their water pump?

Thank you.

 

lefty loosey - righty tighty. Standard thread.

 

I realized thgat my post should have been in the 2nd gen forum. Sorry about that.

Swartkik, your response does not help.

Has anyone removed a cooling fan that had leaf-hand threads? If so, which way did the fan spin?

By the way, the forum had good info on installing the cylinder head. That was great. The most PITA step in the repair was the R&R of the freeze plug behind the driver side engine mount.

 

Sorry. That's what I get for reading/answering the question in the title and skimming the post. The answer still fits though.

I have never seen an application where the fan has spun anything but CCW facing the engine from the front and I have worked on A LOT of these trucks.

*Moving to 2nd Gen Tech*

 

I don't think I've ever seen a left hand thread on a fan bolt either.

 

Thank you for your responses. I would not have expected left-hand threads (or CW fan rotation) either, but I have next to zero experience. Here are 2 of many posts that indicate left-hand threads. I guess that they are mistaken.

https://blazerforum.com/forum/2nd-generation-s-series-1995-2005-tech-41/how-do-i-remove-engine-cooling-fan-33122/
https://blazerforum.com/forum/2nd-generation-s-series-1995-2005-tech-41/clutch-fan-hell-11936/

And now on to searching the forum for 700r4 mods...