johnny spit Posted April 11 Share Posted April 11 Hi, can someone please tell me which way is up on NOS Payen head gasket for flat 1300 , AK520 , It does not state TOP but one side has made in England , Cheers / John Quote Link to comment Share on other sites More sharing options...
glang Posted April 11 Share Posted April 11 As the block and head surfaces are identical on non recessed units it doesnt matter which way up the gasket goes... 1 Quote Link to comment Share on other sites More sharing options...
65redspit Posted April 11 Share Posted April 11 As a side, it is worth Re-torquing it after the first time it runs and then again after 500 miles or so… 1 Quote Link to comment Share on other sites More sharing options...
johnny spit Posted April 11 Author Share Posted April 11 Oh really , That's great thanks for the info Glang 🙂👍 Quote Link to comment Share on other sites More sharing options...
johnny spit Posted April 11 Author Share Posted April 11 @65redspit -Yes i plan on re-torquing it , I'm a little nervous about the rebuild ! I've only just bought the car and don't know everything about it , but every time i check something , its different or modified. The block is the short crank GE from a herald, and the head is the big valve. On my first outing 2 miles down the road it was steaming and overheating , under the bonnet i could see the head gasket bubbling away at the back end and some coolant leaking from a block core plug !!!! when i removed the head and was cleaning it up , found a small crack between 3 & 4 chambers GRRRRRRRR so i have bought a second hand head same numbers big valve , but this engine i have has been honed on the cylinders and as it had shims under the rocker , i'm guessing its got a high lift cam or has been skimmed before , so mmm little unsure how it will play out. Quote Link to comment Share on other sites More sharing options...
Steve P Posted April 11 Share Posted April 11 If it was me I would measure the thickness of the 2 heads and the lift on the cam to get an idea of what I had. Is it going to be on carbs?. S Quote Link to comment Share on other sites More sharing options...
johnny spit Posted April 11 Author Share Posted April 11 Hi Steve, yes twin SU My plan ( or rather anothers with whom has more idea than me ) was to use the original valves, springs pushrods etc with the new head ( 2nd hand) then see if possible to set the clearances, if i couldn't , then fit the shims again under the rocker. Do you think this would be ok ? Thanks Quote Link to comment Share on other sites More sharing options...
johnny spit Posted April 11 Author Share Posted April 11 BTW Steve P , do you still have the spitfire head for sale ? Quote Link to comment Share on other sites More sharing options...
Steve P Posted April 13 Share Posted April 13 Still have the head and cam. S Quote Link to comment Share on other sites More sharing options...
johnny spit Posted April 14 Author Share Posted April 14 What is the price for both please ? and where abouts are you Thanks - J Quote Link to comment Share on other sites More sharing options...
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