Question about Chevrolet Suburban 2500
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Posted on Jan 02, 2017
SOURCE: BAD HARMONIC BALANCER
To remove the harmonic balancer on my 1992 Pathfinder, I needed to loosen the alternator and power steering belts, remove the cooling fan (4 10 mm nuts), remove the radiator (2 10 mm bolts hold it to the frame, remove top and bottom hose [The drain **** is covered by what appears to be a coolant line], as well as the overflow tube to the reservoir. With a 3/4" impact gun and a 27 mm socket, remove the bolt that retains the alt, ps shieves and the harmonic balancer to the crankshaft. With a large 3 jaw puller, remove the harmonic balancer with the pully sheives as an assembly. I do not recommend attempting the removal without the puller.
To put it back on, you will need a large torque wrench for the crankbolt and a small torque wrench for with a crowsfoot for the fan nuts.
Posted on Dec 01, 2008
The harmonic balancer controls the triggering of the combined crankshaft/camshaft sensor. This controls ignition plus fuel injection. Replace the balancer and adjust the sensor or replace it if damaged.
Posted on Oct 18, 2009
Testimonial: "very helpfull ty"
THE thread is a std Left hand to undo But you will need a 3/4 drive100 lbs air rattle gun to both undo and redo up the bolt on front pully.. BUT there is another way and that is as you say a big breaker bar and a good socket, but you will have to take off the starter motor and put a good fitting bar into the starter ring teeth and turn it to the top and dont let it slip out of the teeth and once locked into place gently put pressure on and undo the bolt..
But its unusual for the seal to leak on its own as its mostly due to either the front pully has worn a grove in it or the crankshaft bearing is also worn, so check the front pully for wear first. Ron
Posted on Nov 23, 2009
Testimonial: "This is good advice. Pretty much along the lines of what I was going to do but it is good to get confirmation from someone who knows. Cheers"
SOURCE: no treads on harmonic balancer
the pulley on the crankshaft should have grooves in it for the belt, otherwise the belt will not turn. is the pulley broken off, get back to me. there are NO technical servise bulletins on this item,if you need more help get back to me, Thanks Ray
Posted on Dec 11, 2009
The end of the crankshaft is usually called a snout, because that is
what it looks like — just a shaft sticking out of the front of the
engine between 1½" and 2" in diameter, with a threaded hole in the front, and a key-way along the side.
The harmonic balancer slides over the end of the crankshaft, and is held in place by a bolt and washer goiing into the front of the crankshaft.
The harmonic balancer usually has a ring around the outside separated from the part that goes over the crankshaft by a ring of neoprene. The neoprene and that outer ring are the vibration damper, preventing the crankshaft from ringing. On the face of the balancer the pulleys for accessories are mounted.
Every engine I have worked on — except motorcycles, lawnmowers and outboards — use this arrangement.
Regarding your case, I would do the disassembly first, then — with the parts in your hand — go get the replacement parts. Best guarantee I know of to make sure you get the right parts.
Posted on Jun 21, 2010
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