Valve adjustment loud tick

637 Views 7 Replies 3 Participants Last post by Andrews, 2 mo ago

Andrews

Checked my valves for the first time since ebuying my Foreman and the tappet clearance was non existent by the previous owner.
I adjusted to 0.006 and man is it rough. Ran for a few seconds and she ticks pretty good. Should I assume damage is done and just adjust down to maybe 0.003 and see how it is, then adjust further as needed since where I started from (minimal clearance) was actually sounding pretty good, and know a rebuild may be in the future? In my reading before doing this, I saw someone say they run 0.003 and it is much smoother and runs cooler.
It's an '05 with 8,800km

Edit: also to confirm, I was at "T" on the flywheel though the timing hole.

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JeffinTD

· #2 · 2 mo ago

Being a 4 stroke, the engine may be at top dead center (with the T showing) between compression and power stroke where both valves should be closed and valve gap can be adjusted, or the engine could be top dead center with the T showing, but be between exhaust and intake stroke. In this case both valves would be slightly open (in overlap) and there should be no valve clearance. If you try to adjust the valves with the engine in this position you end up with WAY too much clearance.

Anyhow, I’d check the valves again. If you get about .006, rotate the engine one turn until the T is back and check again and there should be no lash.

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Andrews

Discussion Starter · #3 · 2 mo ago

JeffinTD said:
Being a 4 stroke, the engine may be at top dead center (with the T showing) between compression and power stroke where both valves should be closed and valve gap can be adjusted, or the engine could be top dead center with the T showing, but be between exhaust and intake stroke. In this case both valves would be slightly open (in overlap) and there should be no valve clearance. If you try to adjust the valves with the engine in this position you end up with WAY too much clearance.

Anyhow, I’d check the valves again. If you get about .006, rotate the engine one turn until the T is back and check again and there should be no lash.

Great tip thank you, I will give that a check

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bc buck

· #4 · 2 mo ago

JeffinTD said:
Being a 4 stroke, the engine may be at top dead center (with the T showing) between compression and power stroke where both valves should be closed and valve gap can be adjusted, or the engine could be top dead center with the T showing, but be between exhaust and intake stroke. In this case both valves would be slightly open (in overlap) and there should be no valve clearance. If you try to adjust the valves with the engine in this position you end up with WAY too much clearance.

Anyhow, I’d check the valves again. If you get about .006, rotate the engine one turn until the T is back and check again and there should be no lash.

Yep I found this out the hard way. Tuff for me to get to TDC using pull rope on my Rubicon.

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Andrews

Discussion Starter · #5 · 2 mo ago

bc buck said:
Yep I found this out the hard way. Tuff for me to get to TDC using pull rope on my Rubicon.

You’re spot on! Just checked at 0.006, then rotated the flywheel and holy crap were they lose. Shimmed proper and it is nice, smooth, and quiet, and even better quieter than where it originally started from

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Andrews

Discussion Starter · #6 · 2 mo ago (Edited)

edit: lol never mind, caught my own stupid

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JeffinTD

· #7 · 2 mo ago

Andrews said:
Great tip thank you, I will give that a check

Let us know what you find.

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Andrews

Discussion Starter · #8 · 2 mo ago

JeffinTD said:
Let us know what you find.

My reply fromMarch 31 confirmed I was shimming on the wrong TDC stroke. All good now