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B25 oil pump worm gear removal

Posted: Sat Feb 29, 2020 2:03 pm
by richardreade
I have a B25 engine stripped down , however I have the crankshaft still in the timing side half as I am not sure on the method to remove the oil pump worm drive gear, not wishing to damage anything I thought I would ask

Re: B25 oil pump worm gear removal

Posted: Sat Feb 29, 2020 3:11 pm
by kommando
You need a 2 leg puller but you will need to grind the feet so they are thin enough to get behind the worm gear but long enough to get in past the teeth. I bought the cheapest available and ground away, the puller now sits in the toobox and is only used for this and a couple of other similar tasks.

Re: B25 oil pump worm gear removal

Posted: Sat Feb 29, 2020 3:48 pm
by richardreade
I do not see any way to get a small puller onto the gear, it sits square onto a large thick washer with a bevelled edge, and there is no room between this and the crankcase bearing housing to get puller legs into

Re: B25 oil pump worm gear removal

Posted: Sat Feb 29, 2020 4:24 pm
by midgie
You wont get the puller legs behind the worm gear, the legs need to be thin enough to go between the worm teeth. Then put a jubilee clip across the legs to stop them pulling apart.

Re: B25 oil pump worm gear removal

Posted: Sat Feb 29, 2020 5:10 pm
by midgie
Remove the oil pump drive gear also, this will give more room.

Re: B25 oil pump worm gear removal

Posted: Sun Mar 01, 2020 9:16 am
by richardreade
thanks all done, I just belted the crank through the bearing with a big lump hammer, :-) Only joking I made an alloy drift with a small diameter end to go into the oil hole, Then some gentle heat just to break any corrosion and then knocked it through, no damage done to end of crank.