1998 Chevy Blazer S10 with 4.3L V-6, 2-wheel drive, 4-door

Specifically, I need the manufacturer's torque specs for:

1. Thermostat Housing
2. CAT front flange
3. CAT back flange

If you have a complete list of all torque specs feel free to post them here as it will help out others. I tried using the online Chilton's Manual from my local library but I'm unimpressed with the online edition of the manual as it's difficult to find specifics.

 

This chart gives torque values for all fasteners. All you need to know is the bolt diameter and thread pitch:

http://www.imperialsupplies.com/pdf/...rqueCharts.pdf

 

Thanks, but looking for the manufacturer's torque specs.

 

Well , Captain u tried!!!!

 

For the 4.3L the thermostat housing torque spec is 21 Ft-Lbs.

Now...does anyone know the Cat flange bolt torque specs?

 

Thanks to my local online library!

Specifications for 98 Blazer 2WD

Catalytic Converter to Muffler flange nuts - 40 N·m or 30 lb ft

Exhaust Manifold Pipe to Catalytic Converter Flange Nuts - 35 N·m or 26 lb ft

Exhaust Manifold Pipe to Exhaust Manifold Stud Nuts - 53 N·m or 39 lb ft

Exhaust Manifold Pipe to Exhaust Manifold studs - 15 N·m or 11 lb ft

 

Hey thanks! I really appreciate that you took the time to look up the specs for me. I tried my local library's online automotive manual which is a very lame Chilton's manual. That's where I got the thermostat specs but couldn't find the Cat specs.

Who is the author of the manual you consulted online?

 

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for things like that, I use the 'ol palm of the hand torque wrench... hasn't failed me yet :P but making things factory spec is always a good idea

 

My theory is "do it right" if at all possible as it shouldn't hurt to torque things to spec and most likely is a good thing. I've read quite a few posts where wheel bearings were either torqued too low or too high and the bearings went out prematurely.

I should add that the O2 sensor torque spec is 30 ft-lbs.

Thanks to everyone for your input and comments as it is very much appreciated!