Author Topic: Valve clearances, Hot or cold?  (Read 2291 times)

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Offline Evanc

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Valve clearances, Hot or cold?
« on: 24 Dec 2013 at 11:11 »
Hi guys out there in Douglas land. I have just purchased what I believe is a mark 3 that has a Mk5 frame, not sure why it was swapped. I am interested in setting the tappets but am unsure wether they are set hot or cold. It has 6 thou on a plate on the crankcase. Any advice is appreciated, thanks, Evan from Oz
PS hope you all have a merry Christmas, stay safe

Offline eddie

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Re: Valve clearances, Hot or cold?
« Reply #1 on: 24 Dec 2013 at 17:14 »
          Most Mark series engines had 'Tappet clearance .005' stamped on the top of the crankcase. If yours has a plate with 6 thou clearance stamped on it, then perhaps the engine has been rebuilt with special cams - in which case, it's anyone's guess as to whether that is measured hot or cold. Also, Mark series engines have steel pushrods, so the clearance hardly changes with temperature - unlike the Plus series and Dragonfly with their alloy pushrods.