ZT190 KV6 Camshaft Oil Seal Swap - Tips?
Hi all,
My ZT190 has a leaking camshaft oil seal at the front of the engine, nearest the drivers side headlight. Unfortunately the camshaft has been damaged, and part of the end of the shaft where the timing notch is has broken away leaving sharp edges. This has caused the inside lip of the seal to become damaged (most likely during fitting)and a resultant leak. Fortunately there are no sprockets involved to overcomplicate the job, but access is limited between the cylinder head and the PAS reservoir. Does any body have any tips, or tool suggestions, to help get this swapped as easily as possible please? Thanks, James. |
If you have an old cam bolt left over from the belt changes, use it together with a large socket to press the new oil seal evenly in place. Wet the oil seal with some fluid that will evaporate, fit the new seal in place by hand, and finally press into place.
Good luck ps Use a self-taping screw to remove the old oil seal |
Getting the old seal out should not be too much of a problem, but fitting a new one maybe. The best time to have done this was when the belts were changed , when access to both sides of the engine camshaft were there. now you will have very little room to play with , as you have now realised. A good idea suggested by another member (mr toad) on here was to use a joiners long clamp, which seemingly worked very well.It was used end to end on the camshaft and clamped together. The new caps can be difficult to start squarely and i found that replacing the old cap was much easier ,provided it was not damaged,especially on the lip seal.If the rear belt cover can be removed ,you could try this method with a long clamp. It would be possible without the opposite belt cover removed ,but risks damage to a brittle and not very robust set up. Some members have bought oil seals and done the job, but with limited success , with leeks recurring , and rust appearing on the shaft ends in some cases. (application of grease on that could suffice ) I have used a pry bar and wooden blocks to re insert a new one ,which turned out to be extremely tight , but that is very difficult to get square on access without damage to the cap ends,but achievable. You will need to lift the P.S pump out of the way now to generate enough room to do any work,and maybe hoses and cables. If you can obtain a decent pre used one to fit ,that will help alot. Theres no easy fix for this . .... :}
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Keep well |
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Can I clarify which part you are referring to as "the seal"? Is it the exhaust camshaft end cap which covers the end into which the valve timing service tool fits during belt replacement? If so, surely any replacement will be also damaged by the fractured camshaft, leaving the problem to be tackled at source. Simon |
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Looks like I need to stock up on PAS fluid and be ready for a fight. :box: |
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If you want to stop your oil leak and protect the end of your camshaft from rusting at the same time, I'd recommend fitting the end caps as specified by MG Rover. Simon |
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I’ve used cam seals rather than caps after hearing lots of distressing stories of flying cam caps. Simon refers to "specified by MG / Rover" - yes when the engines were new and blockage of the crankcase gases was yet to happen, but as I and many others have experienced the crankcase ventilation system is flawed.
Simon is quite right again, the caps don’t fall out but rather fly out under pressure and the owner hasn’t much time to prevent a fatal loss of oil. Even if the owner catches the oil loss in time, he then needs to replace the cap and refill perhaps five litres of oil - not much fun or chance at the side of the road. A mechanic at what was our local dealership got so fed-up with caps flying that he developed a special holding bracket which he fitted to every engine in for belt changes. Still each to his own, but I note that DMGRS now supply seals rather than caps as standard. |
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