Changing valves on 5.3 heads
Changing valves on 5.3 heads I've read on the board that the 5.3 and 5.7 heads have the same valve seat and that it is good for up to a 2.02 valve. If this is the case is it just a matter of dropping in 2.02 valves is there any machining required other than a valve job?
Thanks
Eric
Thanks
Eric
I can shift faster than you.
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From: Baton Rouge, LA
Re: Changing valves on 5.3 heads The 2.02 valve drops right in to a 5.3l heads. However, you will need to unshroud the valve quite a bit since the chamber was shaped for a 1.89 valve and a 3.78" bore.
Re: Changing valves on 5.3 heads Jason99T/A is right on <img border="0" alt="[judgement]" title="" src="graemlins/gr_judge.gif" /> The only other thing you'll need is super unleaded <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Re: Changing valves on 5.3 heads I would have to disagree with the "drop right in statement." I have a set of 5.3l heads right here with Manley 2.00 valves and they far from just drop in. Sure they physically fit, but in oder to get the correct spring installed height, the seat needs to be cut alot and a valve job needs to be done to get the correct back cut angles.
Re: Changing valves on 5.3 heads My bad, Jason. Yet, it will require more than just a valve job, the seats are gonna have to be cut alot. If your machine shop counts that as part of a valve job then lucky you.
Blake
Blake
