camshaft removal and refitting

[nova_172]

i hav got my old camshaft out by removing the pulley and the distributor, then undoing the camshaft lg plate and knocking it out, but how do i get the new one in with out damaging it, any tips.

[nova_172]

doing this without removing the head

[Stuart]

you knocked it out??!?!?!?!?! feck


you need a tool that presses 2 valves at a time down. Sykes Pykavant (spelling) do one. but its a bit tricky to find.



other than that, just get the head off

[benji]

laser do a tool to compress the valve then you can remove the follower. do this on all 8 valves then the cam pull pull out easily. fit then new cam, refit the followers by compressing the springs 1 at a time. the tool cost me ?8 trade, so it will probably be about ?10/12 normally.

http://homepage.ntlworld.com/bencurry/IMAGE0003.jpg

[nova_172]

i decided to take the head off instead, but i think i will get one of those tools for the future,anything you can recommend doing to my head while its off, its a 1.2 spi.
thanks

[benji]

what engine? bin the head and get and get a 1.2 carb head. if it's a 1.4 get a sri head

[nova_172]

the bore diametre is bigger on the 1.2 head by a couple of mm will this be ok
its a 1.2

[robb]

I take it the compressor to use without removing head is like this?

http://www.drapertools.com/draper/images/details/33607_373.jpg

If so I need one to change my cam and stop the f**king tapping!

[benji]

mine is similar to that one.

[robb]

Where do these 'clip' to to apply the pressure to remove the rocker?

I can't flip it around and picture it in action.

[benji]

the threaded bit screws in to the rocker cover bolt holes and the l shaped bit at the bottom sit's on the top of the valve spring. i dont think that picture is one that will do a vauxhall, mine are a bit different but the same principles

[robb]

It is a Draper one for GM OHC engines.

I don't like the idea of using the rocker cover holes for compressing springs, I have heard stories that they are weak spots but if you hav done it then it will prob be ok, only gotta compress a bit to remove the rocker i suppose.

I'll get one when I do cam change, easier than removing head (MPi lump).

Did you change any other camshaft components when you put your cam in?

[nova_rally]

Homw much do they cost? Would be handy to have!

Alan

[benji]

about a tenner. the packet say's you need 8 to remove a cam but all you have to do is take out all the follower's then the cam will slide out.

i swapped the followers aswell

[benji]

you can also get the cambelt on and off without touching anything apart from the cam pulley, save's getting covered in coolant when you move the water pump.

[robb]

How much for a set of followers and are they the rocker things? It's just I gotta noisy lifter and I may as well change the cam while I'm in there, and oil seals, and followers, and lifters f**k I'll just get a new head!

[benji]

if you are changing that much, then you should take the head off and have the valves re-seated

[robb]

I have decided to get a secondary head to work on and I'll do the goodies to it.

Then it's simply change them over!