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#Post#: 12450--------------------------------------------------
18lbs valve springs
By: NewbieNick Date: January 22, 2025, 10:58 am
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18 lbs valve springs installation. If you have an engine with
collet type valve retainers this may help you. Valve spring
compressor made from an old 1/2 inch open ended spanner.
#Post#: 12457--------------------------------------------------
Re: 18lbs valve springs
By: RhysN Date: January 23, 2025, 3:16 am
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I watched a guy do valve springs and stem seals on a 12
cylinder just a few weeks back, reminded me how I helped put
16lb springs in a Honda in Seattle, wind the crank to bottom
dead centre, a length of cord through the spark plug hole and
wind to near TDC, push the collet down with a screw driver, pop
the keeper, pull the springs, new ones on, collets back, back
off the piston, pull the cord. Job done. The guy doing the 12
cylinder took well under an hour to do the lot. Similar method
as Nick, just didn't need anything except a push. Standard valve
springs are easily pushed down (even on the motor mentioned)
#Post#: 12458--------------------------------------------------
Re: 18lbs valve springs
By: NewbieNick Date: January 23, 2025, 3:45 am
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Hi Rhys, you will notice the rope in spark plug hole, whilst
pushing springs is quite easy getting tiny little collets in or
out & holding a spring down at the same time I found fiddly &
frustrating hence the heath robinson valve compressor.
Cheers Nick
#Post#: 12459--------------------------------------------------
Re: 18lbs valve springs
By: RhysN Date: January 23, 2025, 4:07 am
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Hi Nick, yes I did spot the rope, that's why I mentioned
"similar method". We, in Seattle, and the guy doing the 12
cylinder, all used a magnet, pencil like to grab the tiny
collets. Very similar, and you are right, they are fiddly, the
magnet is a game changer.
#Post#: 12461--------------------------------------------------
Re: 18lbs valve springs
By: Jimr1999 Date: January 23, 2025, 7:05 am
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I would agree with the fiddlyness of this job having done the
springs on the Lifan 212cc with the collet system. After losing
the collet retainers down the hole that the push rods come up
through and having to open the engine to get at them I would
suggest another tip too, Find a socket that fits the valve cap,
put a magnet inside it, use this to push down on the valve cap,
rope in place to stop valve drop and the collets end up on the
magnet, not down in the engine. ::)
Putting them back in without a tool was a matter of patience and
a lot of swearing, I got the knack after many, many failed tries
at it, but having the tool Nick made would have made it a
doddle.
The collet system is considered superior to the slotted steel
cap you find in most of these engines and GX tuning recommends
them for some of the heavier valve springs they sell.
JimR
#Post#: 12463--------------------------------------------------
Re: 18lbs valve springs
By: tim.wheater Date: January 23, 2025, 2:14 pm
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Stuff rag everywhere you can drop something 😉
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