Stock Timing Gear This rather weedy looking thing is the stock Rover timing chain set, unchanged for the past 30 years. One major problem it suffers from is stretching, and a stretched timing chain will cause significant problems with advance and retard under acceleration a deceleration to both cam and ignition timing. Most are badly stretched, but higher mileage engines will have a major problem in this area.

	And this is what they so often get like. In this picture you can't see the stretch, but you sure can see how tolerant the V8 is, this engine had been (like most ) running for many thousand miles in this condition before it finally died. This is what so often happens when you leave things until they go bang, it cost so much more to correct it this late, and the results may be less than that of rebuilding a cleaner engine. If you are amazed that things can get this bad, go back to our head gasket section and you will realize just how much contamination can occur when the detergents in the oil can no longer do their job.
	J&P Duplex Timing Gear With the J&P Duplex Timing Chain set, we have not only solved the problem of premature chain stretching, but it also offers alternative cam timing options and a Roller chain, as well as being available at a very economical price. It is also offered in all our camshaft Kits See our special offer pages.

Yet more& similar info on our FAQ V8 General Info faq section..