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Shovelhead problems

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Old Aug 29, 2025 | 02:04 PM
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The should be a R for the rear cylinder tdc. To confirm that the the rear is currently at tdc, both lifters should be down and they're lifter bores, pretty much even and with the front lifters they should be in overlap, one will be higher than the other.. but both will move when rocking the fly wheels back and forth a little..
 
Last edited by 98hotrodfatboy; Aug 29, 2025 at 02:19 PM.
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Old Aug 29, 2025 | 02:12 PM
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Originally Posted by 98hotrodfatboy
Yes that would be correct.. So at this point, adjust the rear pushrods.. Now turn the engine one more full revolution till the advanced mark is dead center in the window again.. This is now your front cylinder tdc.. Now you can adjust the front cylinder pushrods.
Sorry, but that isn’t physically possible. The cylinders are 45 degrees apart. One revolution from rear TDC is not TDC on the front.
 
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Old Aug 29, 2025 | 02:13 PM
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D***, what the hell is I thinking it's marked with an R the Rear cylinder tdc..
 
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Old Aug 29, 2025 | 02:15 PM
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Originally Posted by jbarr1
Sorry, but that isn’t physically possible. The cylinders are 45 degrees apart. One revolution from rear TDC is not TDC on the front.
Sorry, man, I don't know what the hell I was thinking. I really don't. I'm not totally with it today. I didn't sleep last night and I was up real early fishing but you are correct. Thank you for catching that. And I hope the op responds properly..
 
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Old Aug 29, 2025 | 02:17 PM
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Oh **** ok
 
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Old Aug 29, 2025 | 02:21 PM
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I'm so sorry, I don't know where my head is... it's been a very rough nite.. not partying, just couldn't sleep and I'm not thinking straight right now..
 
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Old Aug 29, 2025 | 02:23 PM
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It’s cool man **** happens .
so just adjust the pushrods when each piston is at the top.
cause on this mark my rear piston is up.
 
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Old Aug 29, 2025 | 03:26 PM
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Even more important--did you catch any fish??
 
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Old Aug 29, 2025 | 03:34 PM
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The piston is at the top twice for each cycle (4 stroke). Adjust pushrods when on the compression stroke with the piston at the top (or close to it--doesn't have to be exact TDC.
 
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Old Aug 29, 2025 | 03:48 PM
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Apologies to the OP.. @jbarr1 yes i did..1 slot Striper and 3 Blue fish.. going out again tomorrow early.. Tides are perfect right now..
 
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