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| | | | Joined: Sep 2008 Posts: 872 Shop Shark | | Shop Shark Joined: Sep 2008 Posts: 872 | One of the valve guides in my motors head cracked. It looks like it was cast iron (all the others were bronze). I was in the process of pressing them all out and this was the last exhaust guide.
It the cost to have something like this repaired worth it or should I scrap it and look for another one?
Other than this, the head is good (magnafluxed, pressure tested, good valve seats, never decked.
Last edited by pfarber; 06/13/2013 8:18 PM.
| | | | | Joined: Apr 2012 Posts: 135 Shop Shark | | Shop Shark Joined: Apr 2012 Posts: 135 | Replacing a valve guide should be no big deal. check and see if your local NAPA store has a line on a machine shop. Personnaly I would run all cast iron guides, just my opinion
| | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy pfarber, it would be easier to answer your quetion if you told us what head, year and engine you were asking about. If you were able to press the guide out of the head, then you should be able to purchase a replacement guide and install and ream it to size. Egge may be one source for a new guide, it sounds like someone installed bronze inserts in all your other guides, hope that helps. | | | | | Joined: Sep 2008 Posts: 872 Shop Shark | | Shop Shark Joined: Sep 2008 Posts: 872 | By cracked I mean IN HALF... like half is still in the head and the other half on the floor.
There is a jagged part sticking proud of the spring seat.... I guess I could press out from the other side... is that even an option??
Last edited by pfarber; 06/13/2013 8:19 PM.
| | | | | Joined: Feb 2000 Posts: 5,233 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,233 | Its very common to replace guides in heads. It can be repaired pretty easy at any decent machine shop. A head with new guides should have the seats cut so the center of the guide is centered in the seats.
Joe | | | | | Joined: Oct 2006 Posts: 1,847 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 1,847 | You should be able to press it out from the other side, you could use a bolt and a piece of pipe/socket or something the appropriate size and draw it out kind of like a gear puller. if the bore gets a bit scarred up you can get oversize inserts. The absolute best would be to just take it to the machine shop that is what they do and they have all the tools. By the way, that isn't cracked it is broken. | | | | | Joined: Jul 2007 Posts: 328 'Bolter | | 'Bolter Joined: Jul 2007 Posts: 328 | Yeah, no need to scrap ....
Trip to the Machine shop and $20-30 should put your mind at rest!
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