cam shaft replacing

[able]

been reading a few Holden forums and some suggest heating the gear up to get it off and on. some suggest putting it in the oven and heating it right up before you try to put it on.

other people have just replaced the camshaft gear and not the other..... apparently they are buggers to get off and on.

hmmm.

[MaTTe]

what do you mean by the case is in the way? do you mean the timing cover?
If so, you should have the timing cover off, but i can't understand how you could possibly see the gear if the timing case is on..

We use a universal puller, it can be a 2 or 3 bolt puller, but most of the holden stuff we deal with is 2 screw. the puller we have is like a Gclamp, and has a flat that goes upto the face of the crank rather than a bolt that will potentially damage the inner thread(not that that thread is of much use..)

But as was said, if you dont have a flat faced puller, put a bolt in that thread as something to pull against, make sure when the tension comes up on the bolts, that they are pulling evenly. you don't want it pulling to one side as it will cause multiple issues. As you're tightening the main thread of the puller(not the 2x 7/16) brace the whole puller with your other hand so that it keeps it central, as the thread tends to drive in an out-of-square motion.

You'll need to have a fair bit of tension on the main bolt before anything will happen, then all of a sudden it will 'pop' and then it'll come off easily.

What you will need to do in most cases first however, take the key out of the crank that aligns the harmonic balancer, this key can be a fair way out of line compared to the keyway of the gear.
If you're having trouble getting the key out, use a chisel on the side(so it stands up vertically) and use it at the back of the key and hit it with a hammer, this should knock the front up so you can knock it out. Just dont drop it in the sump.

Good luck

[MaTTe]

we never heat the gears, and there have been days where we have been testing cam timing where we've had to putr the gear on 15-20times.. maybe more..

to put it on just use a 1&1/4 socket and a gimpy, you want one with a bit of weight, and you want ot try and hit it centrally, pulling it off is in many ways easier.

If you're testing timing using filed keyways, then only belt it on 3/4 of the distance so you can check it.
But when you are ready to put it on, belt it as hard as you can, because you want it to go on until it bottoms

[able]

what i mean with the case was the block...


not much room for a third arm....


so neither of these two pullers are any good?


what is the generic name for the puller i need if i cant use the ones above?

[MaTTe]

hey mate, the puller i'd use is the gold colored one, the one we use has a flat, where yours seems to have a tip(unless it was an optical illision) so i'd definately use a bolt in the thread on the crank

I see what you mean about the block, but that's not where you'll want to pull it from, you wont get enough leverage like that.

pull the key out of the keyway at the end of the crank, then put a bolt in the end of the crank, hold the puller upto the bolt/crank, then put your two 7/16 fine threads in, tighten them up evenly until it is square, then get a big crescent/shifter or a bar and socket and work the gear off.

[able]

thankyou. first thing in the morning.

you know i could have been asking all these silly questions a few months ago if the person i lent my engine crane to for a weekend didn't take three months to give it back.

[MaTTe]

hahah, better late than never. gotta love it when mates borrow things 'for the weekend'

are you putting the cam shaft and new gear on?
Do you know how to degree the cam?

[Merlin]

HOOHOO cant wait for this description 

[able]

yes and no 

i used two blocks of wood (one at the bottom and one at the top and used a heavy hammer to put the large timing gear on the cam shaft. it went on slowly... i actually had my camshaft all lubed up and was about to insert it and ram it home when it dawned on my that i had not taken the other gear off.... 

i do not know how to degree a cam... i was just going to line up the dots and bolt on the timing cover to tell you the truth.... its only going to be a family runner with a little more grunt the holden intended for the old red 202's.

if you start explaining you will probably should start with if its absolutely necessary for a good runner.   

[able]

well im down a puller as it twisted and broke....

the bastard timing gear is still on and im seeking drastic ways of getting the f*&%king thing off.


found this in my travels...
http://www.isettadoc.com/files/gearpuller1.pdf

i am not spending 200 on something like that though...