24 replies to this topic

[jamesh1988]

Hi,
done a quick search and i have got some info but not what im looking for

I have a 1293 gear box and block with pistons and crank ect already installed but the cam timing is not done i am after some advice on how to do this correctly and what tools will be needed

Thanks in advance

James

[samsfern]

is it an adjustable vernier cam gear?

[jamesh1988]

sorry forgot to say it is a timing belt not chain

[samsfern]

so itll be adjustable. im guessing you know what cams fitted? youll need a dial test gauge, and you need to find true top dead centre as theres a dwell period which can be quite a few degrees. im no good at explaining things, so ill try and find a link. if you havent done anything like this before, i would advise you take it to someone who has, as the engine will not run properly if you get the timing more than 1or2 degrees out.

[jamesh1988]

i cant rember to much about the engine of the top of my head as i got the engine about a yr ago and its right at the back of the garage at the moment i have a rough idea of what needs to be done i just wanted to clear it all up befor i give it a go thanks

[samsfern]

you need to know what the camshaft fitted is, as you need to know what degrees the crank should be at when inlet valve no.1 is fully open.

[mini13]

usually an aftermarket cam will have info stamped on the end.

[jamesh1988]

im thinking on the right lines as that was about as much as i new this might be a stupid question but how can i tell what cam i have got as i did not fit it

i do feel fairly confident in doing this
from what i could work out is you need to find tdc using the gauge and then using a timing disc and the info from the cam manufacture at what deg it should be and adjust it acordingly

please correct me in the bits i am wrong with

[samsfern]

you may have to remove the cam, as its normally stamped at the oil pump end. or you might be able to remove the oil pump and see if anythings stamped there.

also, its not quite as simple as just finding tdc, the pistons have a dwell period where they dont move whilst the crank is going round, if you get what i mean, so you need to be dead in the middle of the dwell period, this is called true tdc. if you just time it when the pistons at tdc, you could be a good few degrees out.

Edited by samsfern, 01 September 2010 - 07:11 PM.

[jamesh1988]

usually an aftermarket cam will have info stamped on the end.

thanks

[jamesh1988]

im going to dig it out the back of the garage tomorrow and find out all the details

thanks for the help so far

[samsfern]

no problem, ill be timing my piper 649+ in tommorow, ill take a few notes, so maybe i can explain it a bit better.

[jamesh1988]

no problem, ill be timing my piper 649+ in tommorow, ill take a few notes, so maybe i can explain it a bit better.

Thanks its appriciated

[jamesh1988]

got it out today and i belive it is a kent 296 cam

it had stamped in it kc sbmd 296

i cant seem to find the deg info needed done a search on google but i think i might just be blind

[samsfern]

have a look on kent cams website, i think its kentcams.co.uk. From memory i think its inlet valve no.1 fully open at 106 degree, but their website has all the info on.