loose valve guide

[pburlison6]

I have a 21hp briggs & stratton v-twin. The exhaust valve guide bushing has come loose. Can I press it back in or is there another fix.

 

[briggs]

i had one do this to me i pressed it back in but the darn thing came out again ..I ended up replacing the motor with another one i had

 

[ILENGINE]

Assuming this is an overhead valve engine, you will need to replace the head. you can press the guide back in, but it will not stay in place, and will start migrating as soon as the engine reaches operating temp.

 

[pburlison6]

Briggs and Stratton sells a replacement vavle guide bushing. Is it oversize or is it the same size. I also heard I could take a punch a score around the quide. Has anyone heard that.

 

[davbell22602]

I never heard of using a punch on the valve guide. I have heard of doing it to a valve seat. Id probably buy new and be done with it.

 

[ILENGINE]

Briggs and Stratton sells a replacement vavle guide bushing. Is it oversize or is it the same size. I also heard I could take a punch a score around the quide. Has anyone heard that.

Per the service manual for the Intek V-twin. If the guides are worn outside spec the head must be preplaced. So I would assuume that the guides are not replaceable on the v-twin OHV engine.

Briggs has replaceable valve guides for the old L head engines, but are the same size as the old ones if there is bronze guides installed, or the block has to be reamed to install bronze guides.

 

[briggs]

Briggs and Stratton sells a replacement vavle guide bushing. Is it oversize or is it the same size. I also heard I could take a punch a score around the quide. Has anyone heard that.

Its not worth the headache trust me i did it and as stated from other members it will come back out ....Buy another head

 

[motoman]

The guides will loosen when a head is overheated. The alloy of the aluminum casting changes and will not then grip the guide. My Intek 24 guide bore and guide OD were to spec, but when reassembled the guide quickly pushed up again. The replacement head has not been a problem, and the second original head is still ok. The engine has had an oil cooler since the failure.

The knurling idea may be from auto repair where a special knurling-reamer can be run through a worn ID for a short term improvement.

 

[tybilly]

ive done the punch thing with valve seats,but now im curious if it will work for that valve guide,try it and let us know.lol

 

[tybilly]

better yet don't try that it might not work and ruin your whole engine,