Valve guide moved

[Phillybo]

Working on a v twin briggs(44t977 -0015g1) with a bent intake push rod. The valve guide is pushed (has a spring,rubber seal on top)out slightly higher than the exhaust guide. Can anyone tell me how much the guides should stick out of the head?
Thinking about readjusting and peening valve guide.

 

[Auto Doc's]

Helo Phillybo,

Have you compared it to the other head to verify what is going on? Often times a pushrod get bent on these when the valve lash is too far out of spec. The pushrod come to the edge of the rocker cup and it binds up on these.

 

[Tiger Small Engine]

Working on a v twin briggs(44t977 -0015g1) with a bent intake push rod. The valve guide is pushed (has a spring,rubber seal on top)out slightly higher than the exhaust guide. Can anyone tell me how much the guides should stick out of the head?
Thinking about readjusting and peening valve guide.

You posted the same question on Lawnsite (another forum). How could anyone possibly know the exact spec on valve guide on that specific Briggs model cylinder head, without having a good one out on the bench?
If the valve guide actually moved, the only real way to make it right long term is a new cylinder head. Yes there are ways to “bush fix” it, but not recommended.

 

[Phillybo]

Helo Phillybo,

Have you compared it to the other head to verify what is going on? Often times a pushrod get bent on these when the valve lash is too far out of spec. The pushrod come to the edge of the rocker cup and it binds up on these.

Think that may be the case here. Springs push down same amount on both exhaust and intake. Valve lash was VERY loose so I may have gotten lucky and just bent a push rod. Thanks for the response!

 

[Phillybo]

You posted the same question on Lawnsite (another forum). How could anyone possibly know the exact spec on valve guide on that specific Briggs model cylinder head, without having a good one out on the bench?
If the valve guide actually moved, the only real way to make it right long term is a new cylinder head. Yes there are ways to “bush fix” it, but not recommended.

Thought maybe someone had a manual that would tell.

 

[Rivets]

This manual may help you out. Valve guides are above the head body. https://www.hunterlomison.com/pdfs/0C8221.pdf

 

[Auto Doc's]

Think that may be the case here. Springs push down same amount on both exhaust and intake. Valve lash was VERY loose so I may have gotten lucky and just bent a push rod. Thanks for the response!

Hi Phillybo,

The manuals do not give the exact design specification for the installed height of the valve guides.

If this head has a pushrod guide plate mounted below the rocker arm retainer bolts, be sure to check them for excessive wear in the area that pushrod comes through. These are often overlooked.

 

[sgkent]

manual say replace head if it overheats and damages guides. Ne factory kit per head is $200 - $220. What is your time worth? Or lets say you fix it, it lasts 10 hours, guide moves, a valve sticks open, takes out the piston, valve, connecting rod, scores the cylinder wall ... what then?

 

[Rivets]

Verify that the guide has moved before replacing the head. As I stated the guide does protrude above the head base. A good repair shop should be able to help you.