iana Posted October 20, 2019 Report Share Posted October 20, 2019 I want to check / adjust the inlet and exhaust valve settings. I believe the car has a piper cam 2397 fitted. Am I correct in think that rocker 1,3,5,7, 9 and 11 (inlet) should be gapped to 12 thou and all even rockers should be gapped to 14 thou. Ive checked the settings currently and theyre all more like 10 thou. TRIUMPH 6 CYL 2397 @ 110.pdf Link to comment Share on other sites More sharing options...
JohnD Posted October 21, 2019 Report Share Posted October 21, 2019 It's clear enough on that spec sheet, Iana. Inlet 12, exhaust 14 thou. But you are clearly unsure as to which valves are inlet and which exhaust. You should look at a picture of a cylinder head with its ports, as the scheme you suggest is wrong. (Pic stolen at random from http://www.74tr6.com/cylinderhead.htm) Why this difference, I don't know. More heat and thermal expansion in exhaust valves? John 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted October 21, 2019 Report Share Posted October 21, 2019 it been set to the normal cam tappet setting which are all the 0.010" as you have found the ports are on 1600/mk1 /mk2 all the same except 1600/mk1 are straight on a stepped head 3/8 studs johns shows the mk2 ports i would say 1 4 5 8 9 12 are exhaust 23 56 9 10 are inet 1 Link to comment Share on other sites More sharing options...
iana Posted October 21, 2019 Author Report Share Posted October 21, 2019 Thanks both, I couldn’t find anywhere that clarified the valve numbers but that explanation makes it very clear and logical (and annoyingly obvious when you are stood looking at the engine!) I’ll have a re-check and adjust as necessary to make sure. Link to comment Share on other sites More sharing options...
JohnD Posted October 21, 2019 Report Share Posted October 21, 2019 Mk1, Mk2 makes no difference in which port is which. J. Link to comment Share on other sites More sharing options...
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