TDC compression stroke question
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TDC compression stroke question
so my heads off my 223 and valve job done, ready to go back on. One question I want to be sure about when initially adjusting the valves - I know how to go about adjusting once #1 is at tdc on compression stroke. I can see the piston come to tdc but not 100% sure if it's on compression or exhaust. Advice please.
Tuned
Joined: Mar 2017
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On #1 compression, the valves will both be closed, #6 valve will be in overlap (partially open).
On #1 exhaust, the valves will in overlap, #6 will both be closed.
Or...if the distributor is still in stock position, the rotor will be pointed towards the oiler (away from the engine) on #1 compression (reference the “1” on the dizzy cap).
On #1 exhaust, the rotor will will be pointed to #6 (towards the engine).
On #1 exhaust, the valves will in overlap, #6 will both be closed.
Or...if the distributor is still in stock position, the rotor will be pointed towards the oiler (away from the engine) on #1 compression (reference the “1” on the dizzy cap).
On #1 exhaust, the rotor will will be pointed to #6 (towards the engine).
Lead Gopher
Joined: Aug 2012
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From: Seattle
so my heads off my 223 and valve job done, ready to go back on. One question I want to be sure about when initially adjusting the valves - I know how to go about adjusting once #1 is at tdc on compression stroke. I can see the piston come to tdc but not 100% sure if it's on compression or exhaust. Advice please.
Chad
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From: Seattle
When #1 is at TDC of the compression stroke both valves for that cylinder will be closed. If it is the exhaust stroke then the exhaust valve with be open. That's an easy way to tell which stroke it is on, assuming the timing chain/gears have been correctly installed.
Chad
Chad
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Chad
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Thanks to all - I think I have it! As soon as I can get some time in the shop I plan to button her up and give it a go!
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Thanks again to all for advice. I installed the head and adjusted the valve lash - started right up. "Skipped" - not quite a miss or surge at high revs but plugs and wires fixed it - new life in an old engine!
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What’s next?
im going to install a good oil pressure gauge. I didn’t change the gasket on the pushrod inspection panel so I’ll watch it for leaks and do it if I need to. Meanwhile, I’m gonna drive it like I stole it!
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BigBlueBomb
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Dec 12, 2013 03:40 PM