can you tell me were the hydalic button is i think thats what wrongwith my 97 disco

 

I have been lucky to never have to replace the chain, but talking with a friend of mine he mentions a small tensioning device that is pressured by oil pressure, I have never seen it, but I know he had a problem with it.

 

There is no such thing Mike. You must have misunderstood your friend. The only thing tensioned by oil pressure is the oil pressure relief valve. Nothing to do with the timing chain.

The new chains are not difficult to replace or time in. Hard to make a mistake. You set your engine at TDC. (I normally remove the distributor). Remove the crank shaft pulley and dampener (there is a cute trick to remove the dampener which is the highest torqued bolt on the engine). Then the timing cover. Undo one bolt to remove cam gear then slide out the old chain. Put in the new chain per instructions. Then the cam gear again. Then the timing cover with a new gasket, and a new neoprene seal for the crank shaft if you see damage (unlikely).

The tough part for some is to retorque the crankshaft bolt. You need 165 lbft +. Try to do it with the rear wheels on the ground, the hand and foot brake on and the vehicle in first. If that doesn't work, remove the plate of the flywheel and jam it with a BIG screwdriver.

James

 

I will have to talk with my friend again and see what he was talking about.