Checking Valve Clearance - KF82

sp_clark · 03-09-2015, 12:06 PM

What is the process for checking valve clearance? Do you have to remove side cover from engine or do you check through valve spring inspection cover?

Springbok · 03-09-2015, 04:12 PM

Here's a blowup of the motor assembly. I never had to check valve clearance on any of my motors. The valves are positioned next to the piston, so there's no piston-to-valve clearance measurement to worry about (flathead motor). If you're worried about the valves hitting the top cover of the cylinder head (#15 in the diagram) you can easily remove it and check things out.

Volt_Ampere · 03-09-2015, 04:26 PM

I'm sure he means lash when closed. He needs the spec for that and maybe a procedure. This should be measured at TDC on the compression stroke. Not sure how the spec reads (cold or hot)

scottyb · 03-09-2015, 05:56 PM

I don't believe it is adjustable. I rebuilt one of these motors years ago. If I'm remembering right lash was a built in aspect of the design, not adjustable.

sp_clark · 03-09-2015, 06:22 PM

Thanks. Yes I was referring to valve clearance....i think spec is .004 to .008. I was wondering HOW you adjust it. Seems like it's just different size tappet caps, which means removing the side cover.

Springbok · 03-09-2015, 07:46 PM

Yes there are tappet caps, they insert into the ends of the valves and ride on the camshaft, I imagine you could access them from that square opening below the exhaust outlet (I think there's just a plate covering it). Is that what you're referring to when you say "side cover"?

ezgo on fire · 03-09-2015, 10:33 PM

They didn't make different size tappet caps. You just had to put the motor togather with the new ones and then sand them down until the right clearance. Why are you worried about the valve clearance. Once set there ususally on for ever. The rivets in the cam gear usually come loose before the cam tappets wear out.

tpg · 03-10-2015, 05:16 AM

They make different size caps. You usually adjust this when you assemble the engine. The easiest way to change them is unbolt the jug and slide it up a little. All done through valve cover hole.

GAC · 03-13-2015, 12:02 PM

I have wondered the same thing. Since I have owned my 1991 kf-82 we have always had a loud tappet sound coming from the engine. It's very annoying but still runs as good as it did 3 years ago.

tpg · 03-13-2015, 05:15 PM

I bought all the sizes at one time. Then when I overhaul one I would measure and pull out the correct one. They are probably obsolete now. I doubt if you can get them any more.

03-09-2015, 12:06 PM	#1
sp_clark Not Yet Wild Join Date: Oct 2009 Posts: 41	Checking Valve Clearance - KF82 What is the process for checking valve clearance? Do you have to remove side cover from engine or do you check through valve spring inspection cover?
sp_clark Not Yet Wild Join Date: Oct 2009 Posts: 41

03-09-2015, 04:12 PM	#2
Springbok Photoshop Guy Join Date: Aug 2012 Location: Canal Fulton, OH Posts: 3,846	Re: Checking Valve Clearance - KF82 Here's a blowup of the motor assembly. I never had to check valve clearance on any of my motors. The valves are positioned next to the piston, so there's no piston-to-valve clearance measurement to worry about (flathead motor). If you're worried about the valves hitting the top cover of the cylinder head (#15 in the diagram) you can easily remove it and check things out.

03-09-2015, 04:26 PM	#3
Volt_Ampere Gone Wild Join Date: May 2012 Location: Rio Verde, Az Posts: 7,183	Re: Checking Valve Clearance - KF82 I'm sure he means lash when closed. He needs the spec for that and maybe a procedure. This should be measured at TDC on the compression stroke. Not sure how the spec reads (cold or hot)

03-09-2015, 05:56 PM	#4
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,418	Re: Checking Valve Clearance - KF82 I don't believe it is adjustable. I rebuilt one of these motors years ago. If I'm remembering right lash was a built in aspect of the design, not adjustable.

03-09-2015, 06:22 PM	#5
sp_clark Not Yet Wild Join Date: Oct 2009 Posts: 41	Re: Checking Valve Clearance - KF82 Thanks. Yes I was referring to valve clearance....i think spec is .004 to .008. I was wondering HOW you adjust it. Seems like it's just different size tappet caps, which means removing the side cover.
sp_clark Not Yet Wild Join Date: Oct 2009 Posts: 41

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03-09-2015, 07:46 PM	#6
Springbok Photoshop Guy Join Date: Aug 2012 Location: Canal Fulton, OH Posts: 3,846	Re: Checking Valve Clearance - KF82 Yes there are tappet caps, they insert into the ends of the valves and ride on the camshaft, I imagine you could access them from that square opening below the exhaust outlet (I think there's just a plate covering it). Is that what you're referring to when you say "side cover"?

03-09-2015, 10:33 PM	#7
ezgo on fire Gone Wild Join Date: Apr 2014 Location: dallas tx Posts: 185	Re: Checking Valve Clearance - KF82 They didn't make different size tappet caps. You just had to put the motor togather with the new ones and then sand them down until the right clearance. Why are you worried about the valve clearance. Once set there ususally on for ever. The rivets in the cam gear usually come loose before the cam tappets wear out.

03-10-2015, 05:16 AM	#8
tpg Gone Wild Join Date: Dec 2007 Location: SE Indiana Posts: 392	Re: Checking Valve Clearance - KF82 They make different size caps. You usually adjust this when you assemble the engine. The easiest way to change them is unbolt the jug and slide it up a little. All done through valve cover hole.

03-13-2015, 12:02 PM	#9
GAC Getting Wild Join Date: Jan 2013 Location: Missouri Posts: 76	Re: Checking Valve Clearance - KF82 I have wondered the same thing. Since I have owned my 1991 kf-82 we have always had a loud tappet sound coming from the engine. It's very annoying but still runs as good as it did 3 years ago.

03-13-2015, 05:15 PM	#10
tpg Gone Wild Join Date: Dec 2007 Location: SE Indiana Posts: 392	Re: Checking Valve Clearance - KF82 I bought all the sizes at one time. Then when I overhaul one I would measure and pull out the correct one. They are probably obsolete now. I doubt if you can get them any more.

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