Differential pinion shaft lock bolt rounded

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Differential pinion shaft lock bolt rounded

April 11, 2017, 01:24:54 AM

Had a good look inside my diff while changing the oil to find the spider gears are badly worn and need replacing the only problem is some monkey has total destroyed the head of the bolt looks like they have rounded it then put mole grips on it then beaten the living daylights out of it with a chisel it's more oval than round now.any ideas how to get this out?.

Differential pinion shaft lock bolt rounded

Reply #1 – April 11, 2017, 02:24:30 AM

>hammer a smaller socket on it
>weld a nut on it
>try something like this http://www.harborfreight.com/9-pc-38-in-drive-metric-bolt-extractor-socket-set-67894.html
good luck man

Differential pinion shaft lock bolt rounded

Reply #2 – April 11, 2017, 07:19:15 PM

With enough patience, small vice grips should do it if you can get them in there. I've had good success with a rusted out broken head bolt and small rounded brake lines recently. You just clamp it down as tight as you can, push on it till it slips, the two it back off, twist it in a bit, reclamp, repeat.

Takes a long time, but usually works unless the bolt head breaks off.

Differential pinion shaft lock bolt rounded

Reply #3 – April 11, 2017, 07:37:35 PM

Probably loctite. If that's the case, clean away as much gear oil as possible, and heat the carrier around the pin. Propane should be hot enough. If the problem is loctite, that much heat should do. Obviously, plan for the possibility of leftover brake cleaner or stray gear oil catching fire. I wouldn't want to hear that my advice cost you your car.

Differential pinion shaft lock bolt rounded

Reply #4 – April 12, 2017, 01:47:33 AM

Ok thanks for the advice will get this done soon when i have spare cash to buy the spider gears.Car has been a real pain this year keeps ending up on the back of a tow truck seams to like it up there too much.As for fire done that to an opel manta trying to heat a stubborn rear axle bolt,big fire,big red fire engine i always have a fire extinguisher close when i work with heat or fuel related work don't what to ever whatch my pride and joy burn again.

Differential pinion shaft lock bolt rounded

Reply #5 – April 12, 2017, 02:21:53 PM

Personal experience here...if you have a car, you need a fire extinguisher. Maybe two. Do a lot of fuel/oil/solvent work? Get the appropriate one...

Just passing on a painful life lesson without the pain.

Differential pinion shaft lock bolt rounded

Reply #6 – April 13, 2017, 01:21:02 PM

I've used the attached bolt extractors with good luck.
Kit is actually 10 pieces 3/4"/19mm to 3/8". Two 5 piece kits. Can be used on SAE or metric.

https://www.lowes.com/pd/IRWIN-BOLT-GRIP-5-Pack-Bolt-Extractor-Set/501462