Blown Headgasket

Bu11et_Proof

I'm half way through getting the head off a car that has a blown headgasket. At the moment the only thing thats left is to remove the headbolts but the cam sprocket and cam shaft are still in place in the cyclinder head.

My question is, can I remove the sprocket and shaft together ? or will I have to remove the sprocket first. The head has to be skimmed so they both have to be taken out but don't want to have to go to the hassle of getting the sprocket off if I dont have to.

This doesn't seem to be covered in the haynes and its the first time I've tackled this job.

Thanks for your help

bushy...

Usually you can remove the shaft and sprocket without separating them- you might have to part them anyway when fitting a new belt ( if it has one)

Sometimes they are not "keyed" to each other , so you'd synch stuff on re-assembly by locking the crank at say TDC and lining up a mark on the camshaft itself with something on the head - more accurate from the "engines point of view" than a non-adjustable camsprocket.

Those Haynes manuals do a bit too much of the " re-assembly is the reverse of removal - have fun - k bai thx " sometimes.

DublinDilbert

You don't specify what car and engine your working on.....

Depending on the engine you may well have to remove the cams to get at the head bolts. I was doing the head on a DOHC 16V engine recently and both cams had to come out to get at the head bolts. On most SOHC you don't have to take out the cam shaft. If you don't have to take out the cam shaft, don't... less to go wrong...

By the sounds of it you have a timing chain, i would cable tie the sprocket to the chain in the correct place and remove the bolt(s) holding it to the end of the crank shaft.

Bu11et_Proof wrote: »

I'm half way through getting the head off a car that has a blown headgasket. At the moment the only thing thats left is to remove the headbolts but the cam sprocket and cam shaft are still in place in the cyclinder head.

My question is, can I remove the sprocket and shaft together ? or will I have to remove the sprocket first. The head has to be skimmed so they both have to be taken out but don't want to have to go to the hassle of getting the sprocket off if I dont have to.

This doesn't seem to be covered in the haynes and its the first time I've tackled this job.

Thanks for your help

Bu11et_Proof

Sorry lads its an 8v Mk1 Fiat Punto SOHC, the reason I need to remove the camshaft and sprocket is that the head needs be skimmed and the chap doing the work said they will need to be taken out before I bring it to him.

It would be easier for me to remove them attached in one piece as getting the sprocket bolt off can be a pain in the arse. No point doin unnecessary work, if I don't have to.

I can get at all the headbolts no problems.

bushy...

You might have to remove the cam sprocket anyway to set the timing up accurately , when the head is skimmed the relationship between the cam sprocket and crank sprocket changes slightly.