Valve stem seals

[Dixie]

Hi All

 

Hope you are all well.  I'm rebuilding thread on my 79' gs 750 and having trouble with the valve stem seals.  The ones in the gasket kit don't seem to fit that well.  Am I missing something.  Are they supposed to click into place, as these just push on lose.  They are different to the ones I took off.  Can anyone give me some tips or am I wasting my time with these and need to get a different make.  Thanks in advance. 

[TonyGee]

their suppose to be a tight fit, if their loose their no good.  

[Dixie]

Thats what I thought, if I try and use a 7/16 socket to tap them on the split the rubber seal at the top

 

[Slabby11]

Are these from Suzuki or a pattern set?

[Dixie]

I think I have now found the problem, am I right in thinking that there is a ring or clip that fits to the top of the guide so that the seal will clip on?

I had the head stripped and skimmed and the old seal were a bitch to remove so the company that cleans and skimmed the head sent back a box of bits including what was left of the old seals.

[Swiss Toni]

Pictures?

[IceKat]

No Dixie they just press on, no clip or rings involved. You can feel it when they snap into place. If they are loose they Will not function.

Edited December 7, 2020 by IceKat

[TonyGee]

interference fit.  you have to tap them on

Edited December 7, 2020 by TonyGee

[Gixer1460]

13 hours ago, TonyGee said:

interference fit.  you have to tap them on

Really? I've never needed anything other than my thumb! New / soft seals shouldn't require anything to 'tap' them on!

[TonyGee]

1 hour ago, Gixer1460 said:

Really? I've never needed anything other than my thumb! New / soft seals shouldn't require anything to 'tap' them on!

its been a long time since i fitted any stem seals but the OEM ones ive fitted in the past have a metal insert, theirs no way you could push them on with your thumb as you risk damaging the top sealing lip where the spring sits, i had to use the factory tool to install them. 

[Swiss Toni]

Firm push, as 1460 says. Just enough to expand the wire clip. Any force, you’ll deform the seal. Tiny amount of lube on the lip won’t hurt either. If engine’s going to stand a while, bit Moly on the valve stems on assembly a good idea too!

Edited December 8, 2020 by Swiss Toni

[Gixer1460]

2 hours ago, TonyGee said:

i had to use the factory tool to install them. 

I didn't know there was a 'factory' tool for this ......... I don't think the majority of engine builders do either

[TonyGee]

46 minutes ago, Gixer1460 said:

I didn't know there was a 'factory' tool for this ......... I don't think the majority of engine builders do either

yeah their is, ive worked for a few dealers and some have the tool others dont. even Suzuki have a tool for installing valve guide seals, they use the tool for removing/fitting the valve guide, 09916-44310  

Edited December 8, 2020 by TonyGee

[Dixie]

Thanks, everyone sorted now, the ones that came with the gasket kit were shite.  Found the right ones through a local engine specialist.  They did just push on with an interference fit.

[Swiss Toni]

Stick a bit oil or moly on the stems when you fit the valves.