Camshaft timing

Hi, hoping someone could give a definitive answer.
My mate has just put the head back on his Disco 2 TD5. But because the marked links on the timing chain had faded he has set it up one tooth out on the cam sprocket. With the head fitted it’s is impossible to move the chain on that one tooth. So he a has two options, one is to remove the head and start again. Or option two remove the timing chain case cover, the sump is already off by the way.
Does anyone know if with the timing case removed if it would be possible to unbolt and slide out of position the chain guides and either move the chain round on the crankshaft sprocket one tooth. Or get the chain off the crankshaft sprocket so that the chain can be lifted higher in the cylinder head and the chain moved one tooth on the camshaft sprocket. This would save all the expense of lifting off the head again and buying new bolts and gaskets. Anyone know for sure if it can be done?
Thanks in advance

smac02 said:

Hi, hoping someone could give a definitive answer.
My mate has just put the head back on his Disco 2 TD5. But because the maker links on the timing chain had faded he has set it up one tooth out on the cam sprocket. With the head fitted it’s is impossible to move the chain on that one tooth. So he a has two options, one is to remove the head and start again. Or option two remove the timing chain case cover, the sump is already off by the way.
Does anyone know if with the timing case removed if it would be possible to unbolt and slide out of position the chain guides and either move the chain round on the crankshaft sprocket one tooth. Or get the chain off the crankshaft sprocket so that the chain can be lifted higher in the cylinder head and the chain moved one tooth on the camshaft sprocket. This would all the expense of lifting off the head again and buying new bolts and gaskets. Anyone know for sure if it can be done?
Thanks in advance

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dont worry about the marked links ,pin crank ,undo tensioner slacken cam sprocket bolts align cam pin tighten tensioner then cam bolts,remove pins turn engine over twice then ensure both pins align

jamesmartin said:

dont worry about the marked links ,pin crank ,undo tensioner slacken cam sprocket bolts align cam pin tighten tensioner then cam bolts,remove pins turn engine over twice then ensure both pins align

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That doesn’t work James. He has set the sprockets out of sync. The timing pins cannot line up. Thankfully he has gone too far with fitting out the head so did png try starting the engine.

smac02 said:

That doesn’t work James. He has set the sprockets out of sync. The timing pins cannot line up. Thankfully he has gone too far with fitting out the head so did png try starting the engine.

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they can if you undo the cam sprocket and turn the cam shaft till it does, release the tensioner first

jamesmartin said:

they can if you undo the cam sprocket and turn the cam shaft till it does, release the tensioner first

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Hi thanks for the advice. Tried that but there is no way to turn the camshaft without damaging it, no flats or places to grip it. Also the slotted holes in the sprocket mean that the sprocket has to be in the correct position relative to the camshaft or the bolts won’t go in properly in the camshaft when fitted to the cam. Thought about swinging the crankshaft anti clockwise to align the cam first and then time it up from there but we cannot get the bolts in the cam at all to do this. It’s all about the geometry of the slotted holes in the camshaft sprocket.

smac02 said:

Hi thanks for the advice. Tried that but there is no way to turn the camshaft without damaging it, no flats or places to grip it. Also the slotted holes in the sprocket mean that the sprocket has to be in the correct position relative to the camshaft or the bolts won’t go in properly in the camshaft when fitted to the cam. Thought about swinging the crankshaft anti clockwise to align the cam first and then time it up from there but we cannot get the bolts I the cam at all to do this. It’s all about the geometry of the slotted holes in the camshaft sprocket.

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you can remove cam sprocket,fit bolts a few mm then use them to turn cam then fit pin refit cam sprocket the tensioner then tighten cam bolts, its only the same job as i do after fitting a head gasket