1938 G head RANT!!!!!

[GreenAcres]

I recently got my F49R cylinder head back from the machine shop, and I am more than mad to say the least. They did very little if any cleaning, milled the face, replaced valve seats and guides, did as little as possible. The BIG problem is that they magnafluxed it and said it was good, so when I picked it up Friday I noticed a one inch crack in one of the intake valve guide bores (split). When asked about it they didn"t seem too concerned and said it shouldn"t leak. So I am in desperate need of every ones opinion on what to do. Will it leak? Should I try to have it fixed? Should I try to find a replacement, keep in mind this F49r head is one of the hardest and most expensive heads to find. I told the machine shop to expect $2000 to $5000 dollars to resolve this issue and they didn"t believe me, they think this is just and plain old head you can get at any junk yard for a couple hundred bucks. Thanks

 

[elkcagg]

Did you see this split in the valve guide bore before you sent it there? My bet is it wont but depends where it goes.

 

[817jdg]

It probably wont leak. You need to pressure check it. That will tell the truth. Where are you located at? It easy to miss a crack in the port when magnafluxing

 

[jd1520]

Can the valve guide bores be sleeved like some of the antique car engines?

 

[jd1520]

http://www.hthoward.co.uk/engine-machining-services/how-do-ht-howard-ensure-the-best-for-your-cylinder-head/bronze-valve-guide-sleeving/
Untitled URL Link

 

[jd1520]

http://www.hastingsmfg.com/ServiceTips/valve_guide_liner.htm
Untitled URL Link

 

[gtx1967jewison]

This often happens because of pressing the old guides out with force. The casting is 75 yrs old- they need to be cut out (machined) with care, not pressed. After cleaning & sizing the new ones can be pressed in. I'm no expert but was informed this by one. Sounds like they broke your head