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Speed7 01-28-2013 05:04 PM

Bowtie Heads
I have a set of Bowtie phase II heads, part no. 14011034. Are the guides removeable? If so would it be difficult to warm the heads up and knock out the guides and replace them with new bronze guides.

scholman 01-28-2013 05:45 PM


Off hand I would say the guides need to be machined out then drive in the new guides. Then ream the guides to size.

If you could post a picture of the heads from the valve spring side as close as you can and with springs and valves removed I then may have to change my answer, but for now I will stick with the machine work.


hcompton 01-29-2013 05:48 PM

What is the reason for changing guides?

If they are worn you have a few options but would need to measure the guides to be sure they are actually bad. Usally its just worn seals blowing oil.

If your changing to smaller stem valves the guides may be bigger od than the new small id guides. If that makes since.

You can see if they have bronze guides witht he valve cover off and a strong flash light. If its bronze its replacable. Only real way to be sure since many engine builders will drill out the stock guide bosses with porting or valve/seat replacement.

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