20V crank timing pulley, cant get off

[ke70dave]

hey guys

as stated, been pulling down my 20V bottom end for new bearings and rings.

got pistons and rods out all nice and easy,

but in my efforts at trying to get the timing gear pulley off the crank, i damaged it

i havent managed to get it off yet, but im going to buy a puller today.

this is what im trying to get off



so basically im wondering if anyone knows if i can buy one of these brand new, and if so do they have a part number, or if not, where would i find one, and can a 16V one be used?

thanks guys

[rthy]

there was a discussion about this previously and many people including myself beleived that it wasnt possible to get it off using a puller. One guy had a very creative idea of drilling a hole into it, tapping it and using a slide hammer, what a genius

[ke70dave]

<div class='quotetop'>QUOTE (Sam_Q @ Dec 15 2007, 09:34 AM) </div>yer i have read different oppinions about it, some ppl say its possible, others say its not.

but i havent managed to get it off, so i thought its worth a shot!

might try heating it up with my flame thrower gas bottle thing,

kinda sucks as i was supposed to have the block in the machine shop yesterday, but this bloody thing stopped me.

[rthy]

yeah just avoid 2 things:

- drilling through the pulley and hitting your water pump

- heating your crank too much

[COS61AE86RACER]

undo the oil pump from the block and take the crank & oil pump to a work shop that has a press, put the backside of the oil pump on the press"bench" and then set it up to push on the nose of the crank (put something on the nose of the crank so it doesn't get marked up)

works a treat every time, does not need a lot of force at all

yes a 16v one will work fine

later
Chris O

[ke70dave]

<div class='quotetop'>QUOTE (COS61AE86RACER @ Dec 15 2007, 09:44 AM) </div>that was goin to be my next question, if i can take the crank out with the oil pump.

excellent mate, thanks for that, looks like ill just take the crank down with me with the block.

[rthy]

sounds kinda scary to me, I think for the average person that might be ok but on my engine I have a broken keyway and I think my oil pump would be a bananna shape if I tried that one. You know I never would of thought of doing it that way

[ke70dave]

<div class='quotetop'>QUOTE (Sam_Q @ Dec 15 2007, 09:47 AM) </div>yer i did think of it, but didnt feel like buying a new oil pump and a new crank pulley....

[COS61AE86RACER]

Not scary at all Sam, just sounds like it is ;-)

have done it numerous times on 16v, 20v & 7a

when you set it all up in the press id say there would be lucky to be 1k of force applied, all your really trying to do is overcome any of the growth / crap that has found its way between the crank / keyway & pulley

Chris O

[rthy]

yeah fair enough, in that case sitting on the oil pump and hitting it with a mallet would probably even do it