Replacing Cambelt With Aftermarket Pulley

[alanw89 0]

I was planning on putting the cambelt on my car today, when i bought it it didnt have one on, but came with one to put on. So i've read all the haynes stuff about lining up the two timing holes, but my car has a piper cams pulley that doesnt seem to have a timing hole on it. All i can see is some markings showing where 0 degrees is and then 10 degrees marked on either side. Does any one know how to line this up so that i dont wreck the engine when i turn it over?

 

Thanks

[pug_ham 244 3 Cars]

If you line the crank up with the timing pin in the right hole then you could take the cam cover off & mark a line somehow on the camshaft & a bearing cap then you should be fine to remove the old belt & fit a new one with it like that.

 

The cam shouldn't move when the belt is disconnected imo but at least if you mark it you'll be able to see if it has & line it back up before tensioning the belt & turning the engine over.

 

Graham.

[alanw89 0]

Thanks for the reply, thing is, there isnt a cambelt on the car at the moment, i bought it as a project that someone got bored of so theres lots of things that were disconnected or off when i got the car, the cambelt being one of them. I've no idea if the engine has been turned at all since the cambelts been off.

[pug_ham 244 3 Cars]

What else has been done to the engine for it to have the vernier pulley?

 

It sounds like you'll need an original cam pulley to get the cam into roughly the correct place imo & then once the cambelt is fitted set the cam timing right for the camshaft with a DTI on the valve bucket & angle guage on the crank pulley.

 

Even using the standard camshaft with a skimmed head fitting a vernier is a good plan imo.

 

Graham.

[welshpug 1,657]

personally I would;

 

1, remove spark plugs

 

2, loosen all the cam bearing cap nuts (means all the valves close and you can turn the bottom end without fear of bending a valve)

 

3, set bottom end position and pin it in place (IIRC the pistons sit mid way in the bores)

 

4, set cam orientation with a standard pulley, tighten cam cap nuts.

 

5, if you with to keep the vernier mark the cam and one cam carrier cap and also make a mark on the inner timing belt cover in relation to the camshaft pulley, this will help you get the cam fairly closely lined up.

 

6 if you do use the vernier pulley set the timing by Lift @ TDC, or lobe centreline.

[alanw89 0]

Thanks for the replies

 

What else has been done to the engine for it to have the vernier pulley?

 

It sounds like you'll need an original cam pulley to get the cam into roughly the correct place imo & then once the cambelt is fitted set the cam timing right for the camshaft with a DTI on the valve bucket & angle guage on the crank pulley.

 

Even using the standard camshaft with a skimmed head fitting a vernier is a good plan imo.

 

Graham.

 

Not really sure whats been done to the engine to be honest, i dont think theres a different camshaft on it just the pulley maybe.

 

 

personally I would;

 

1, remove spark plugs

 

2, loosen all the cam bearing cap nuts (means all the valves close and you can turn the bottom end without fear of bending a valve)

 

3, set bottom end position and pin it in place (IIRC the pistons sit mid way in the bores)

 

4, set cam orientation with a standard pulley, tighten cam cap nuts.

 

5, if you with to keep the vernier mark the cam and one cam carrier cap and also make a mark on the inner timing belt cover in relation to the camshaft pulley, this will help you get the cam fairly closely lined up.

 

6 if you do use the vernier pulley set the timing by Lift @ TDC, or lobe centreline.

 

 

I dont really want to remove the bearing caps as i dont have a torque wrench to tighten them up properly. I thought of a way i could do it last night but not sure if it would work.

 

I've got a spare cylinder head and cam that came with the car but im pretty sure the guy said the valves werent sealing, assuming the cam is the same could i line it up and use it as a comparison to try and line up the lobes the same on the cam that is in the car just now just by eye. Do you reckon this would work.

 

The engine has got a crack in the block anyway so this is really just to get the car running to make moving it around easier without costing me any money, all the parts i need came with the car. I want to get another engine fitted in the summer maybe anyway.

 

Also i dont really understand what you mean by No.6?

[pug_ham 244 3 Cars]

Also i dont really understand what you mean by No.6?

If you have an aftermarket camshaft fitted then there will be max lift angle setting (106' or 108' ATDC) which you use in conjunction with a vernier on the cam follower & an angle guage on the crank to time the camshaft up correctly.

 

Graham.

[jord294 92]

it's not exact, but it gives an idea of when the cam is in the right position

 

turn your cam pulley until the rotor arm is pointing towards plug lead number 4