How to replace crankcase pulley balancer? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-29-2008, 04:28 PM   #11
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It doesn't matter what size socket is required to take it off, the crank pulley bolt torques to 220 foot pounds for 1986-1990 engines, VIN #* 3, B, & C.
1991 engine, also VIN C, torques to 98-112 foot pounds plus an additional 52-60 degrees of rotation (which will most likely require at least 220 foot pounds to achieve).
And as mentioned no special tool are required for this task, unless a length of pipe is considered special. The impact wrench makes it a lot quicker and easier, but don't let the absence of an impact keep you from fixing your car.
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Old 02-03-2008, 04:04 PM   #12
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Easiest way to loosen the bolt is to brace the breaker bar (or 1/2" drive ratchet if its a good one) on the frame of the car. Remember the engine cranks clockwise. Then simply jump in the car, and tap the starter. Usually it barely takes half a second (the engine wont even have to rotate a full rotation). DO NOT START THE CAR - but that is self explanatory. This is the quickest and easiest way of breaking that bolt free.
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Old 02-06-2008, 05:49 PM   #13
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Something unexpected happened that made it impossible to move the car to where I could work on it outside during temperature rises between winter storms.

While driving, I suddenly heard the serpentine belt shredding, but I expected that and had an old spare in the trunk to put on if it completely broke. A few minutes later the engine stopped running. It turned out that the HB and the belt were still barely working, but a belt shred had whipped on sensor wires, which pulled out and mangled a sensor plug, stopping the engine.

This was the upper of the two plugs on the right of the HB. It is a three wire plug that doesn't look like the Vin C four wire plug in http://i38.photobucket.com/albums/e1...n/DSC00613.jpg Also the Vin C wires appear to have a protective flexible conduit around them, that I don't recall seeing on the Vin 3. What I saw was three exposed gray wires with female pins hanging out of an oval insert body. I couldn't tell if there was a missing plug cover, nor could I see any keyway. If I reconnected the plug pins with the wrong orientation, I might cause more damage.

I decided it was time to throw in the towel, and had the car towed to a shop. Unfortunately, this sensor plug mishap has doubled the professional repair cost.

The pro mechanic told me he had heard of this risk from a shredding belt. Had I known, I would have had enough time to pull over to the side of the road and snip off the belt shred(*) with scissors or knife.

Thanks to everyone for advice. That was an interesting tip about using the starter to break the 220 ft/lb HB bolt free.
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Old 02-06-2008, 11:38 PM   #14
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Quote:
Originally Posted by Jim Burke
...decided it was time to throw in the towel, and had the car towed to a shop. Unfortunately, this sensor plug mishap has doubled the professional repair cost.
Sometimes that is the best approach. Sorry to hear about your mishap.
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Thanks to everyone for advice. That was an interesting tip about using the starter to break the 220 ft/lb HB bolt free.
Its amazing how much torque the starter (combined with the lever action on the flywheel) puts out. 220 ft/lb doesn't even so much as slow it down.
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Old 06-30-2008, 11:53 PM   #15
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I am new to this forum and thought it would be OK to revive this thread. I have a 1992 Bonneville se that needs the harmonic balancer replaced. I was wondering if this model needs a puller to get the balancer off or is it slip fit? I was also wondering if one of the electric impact wrenches from Harbor Freight will work? (I think it has 240 Ft. Lbs) I am wanting to get this done in a smooth manner so I am asking before I start working on it again. I tried a screwdriver in the flywheel and I broke a socket extension (and my knuckle) trying to get the nut off. Am I right in thinking that the nut is right handed? Thanks for your help.
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Old 07-03-2008, 07:19 PM   #16
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I haven't done a '92 but my Chilton'* manual says you need a puller for '92 and up.
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Old 07-12-2008, 03:13 PM   #17
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Ok you DO need a puller for 1992. I went to harbor freight and bought an impact wrench rated at 240 lbs. It wouldnt take it off. I ended up with a good breakover and a jackstand to take it off. Its not hard to do if you have the right tools.
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Old 07-13-2008, 05:35 PM   #18
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I thought I made that clear.
Quote:
Originally Posted by bastard View Post
I haven't done a '92 but my Chilton'* manual says you need a puller for '92 and up.
It actually says you need a puller for 91 and up, which means that 1991 model cars and newer will need a puller.
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