MARK

The suppliers have now admitted that the springs and other parts sent are for the earlier CP TR6 not CR! They assure me that they will fit ok providing I use the two piece valve caps for the exhaust valves. I don't know why this should be so. I believe later TR6 use the same single piece upper valve cap for both inlet and exhaust. Can anyone explain why they apparently used different upper valve caps on earlier cars for inlet and exhaust ? Would it be ok to use the one piece type on on the exhaust valves with earlier springs? To me the later type one piece valve cap seems to fit wel

I have a spare cylinder head which is fitted with single valve springs. I wish to fit this to my TR6 1973 uk car but with double valve spring configuration. I asked a well known supplier to send me what I would need but I'm not sure that I have been sent correct parts. The diagrams of workshop manuals are vague. The Brown book states that ' Later PI cars the valve collar arrangement on both inlet and exhaust valves is as diagram A' - which shows a one part upper valve collar. However double valve configuration is not shown. The diagram shows a valve spring seat with a raised centre part. I