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Looking for guidannce - six stubborn bolts on crankcase

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philward:
Don't forget the socket/extension and crack with a hammer before attempting to remove. And copper based grease on re-assemble

McCabe-Thiele (Ted):

--- Quote from: Bryanj on March 18, 2021, 06:13:54 PM ---Six sided impact socket and rattle gun, if they are that corroded into the alloy they willbreak no matter what you do

--- End quote ---

I've not persisted with my cordless Kielder Impact gun as I do not want to risk rounding them off at this stage - I am going to apply some heat / Plus Gas formula A over the weekend then get a Mate who has a more powerful version of my tool - its a beast - an all metal Milwuakee Professional with Red Fuel Battery Technology it made short work of a wheel bolt that would not budge last year.

As you have said if it has corroded into the alloy it will break anyways - virtually impossible to get the releasing fluid to where it needs to be - just pray that the broken bits will eventually come out. The one in the sump worries me as I thought this one would let go easily. I guess these bolts are the ones that hold the crank firmly in place judging by their position.

McCabe-Thiele (Ted):

--- Quote from: philward on March 18, 2021, 10:50:57 PM ---Don't forget the socket/extension and crack with a hammer before attempting to remove. And copper based grease on re-assemble

--- End quote ---
Yes Phil I did the hammer crack first - I am a big fan of Copper Grease but most torque settings are based on dry assembly unless you mean just grease the unthreaded part of the bolts.

K2-K6:
The zinc plating does the non-seize protection bit and they coated all the fixings diligently in this way in a "but what did the Japanese do for us scenario"  :) but being sacrificial and subjected to British salty roads, there's obviously a limit to how much zinc survives over many years.

Ultimately it's wise to re-zinc them for a proper job.

McCabe-Thiele (Ted):
My mate Marco dropped in this afternoon with his young muscle and Milwuakee Power tool - took less than 2 minutes to remove all six bolts - he used some weird 12 mm socket that was multi sided and grabs the bolt head without chewing it up!

Obviously I must have loosened them with the heat cycle this morning. lol (clearly in denial).

This is the tool my Mate had https://www.sgs-engineering.com/m18onefhiwf12-553p-impact-wrench-with-packout-case

The socket he used looked at a glance like a standard 12 mm socket but instead of having normal flat sides they had a curved edge that sort of peaked in the centre of the flats when they removed a bolt it was a bit of a job to make it let go of the bolt - never seen them before.

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