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Thread: need hs-40 help

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    Senior Member colt 1911's Avatar
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    need hs-40 help

    i have a hs-40 that is missing the engine tag that was held on with the 2 rivets- it has points and the exhaust port is minus the 1/2 inch threads- i would like to replace the piston rings- would someone tell me a engine part number that i can use to order parts? thanks Jeff

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    Havasu Dave's Avatar
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    HS40-55513F is a points engine. Bores were the same for the HS40s. Cams were changed, as was the ignition as you mentioned, but the rest should be the same for all of them. You might try and get some .010 over rings if you've honed it, then file end gap to specs. They tend to run wider end gaps on factory ring sizes.

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    Senior Member markus's Avatar
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    Quote Originally Posted by colt 1911 View Post
    i have a hs-40 that is missing the engine tag that was held on with the 2 rivets- it has points and the exhaust port is minus the 1/2 inch threads- i would like to replace the piston rings- would someone tell me a engine part number that i can use to order parts? thanks Jeff
    Might want to make positive it is an HS40 block before ordering anything HS40, The only way you get one of those with no 1/2" NPT threads in the exhaust if theyare machined out or busted out by a header.

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    Senior Member colt 1911's Avatar
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    thanks guys- i thought it was strange not seeing the threads- all my previous engines were threaded- i am currently building another known hs-40- could i compare the cylinder diameter?

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    Havasu Dave's Avatar
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    Bores for points engines:
    2.8120 HS 50
    2.6250 HS 40
    2.5000 H35, H40

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    Senior Member colt 1911's Avatar
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    i have a parts break down for a 55513E from 1978 that i can use- thanks

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    Senior Member colt 1911's Avatar
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    what was the last year for the id tag with the 2 rivets?

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    Senior Member markus's Avatar
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    Quote Originally Posted by colt 1911 View Post
    what was the last year for the id tag with the 2 rivets?
    They were transitioning them out in 1974 and going to the stamped on top style, you could find some engines to still be the old style shrouds and small aluminum flywheel but stamped on the top up near the headbolts, no id tag though (but the holes were there for them). Not as much for the HS40 as they were able to transition them pretty fast to the squaretop shroud since the HS50 flywheels fit those, but the smal H engines were drug out into 1975 til they got the steel flywheel worked out for them.

    you can see how they stamped the curved shrouds on this 1974 JC penney Duster Chopper I once had:


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    Senior Member colt 1911's Avatar
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    thanks Markus

 

 

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