What Phil said, I did a head for a customer a couple of months ago that suffered valve seizure due to insufficient clearance/reaming.
Ac
Valve Guides How Do You Know If You Need To Replace
Started by
Steve-O 2014
, Jan 26 2017 03:35 PM
16 replies to this topic
#17
Spider
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Posted 27 January 2017 - 07:37 PM
Always, always ream the guides. They're an interference fit and pressing them into the head means they do need to be reamed to ensure correct clearance. You may get away with it as mentioned above, but I personally wouldn't chance it.
You also must recut the seats, no if's not but's, to ensure proper seating of the valve.
You can knock the old guides out with a punch and hammer, but a press is better and they should be pressed back in to avoid distortion.
You're just asking for trouble if you don't do things properly.
Phil.
One thing I do disagree with here Phil.
"Your just asking for trouble if you don't do things properly"
I think the work 'expensive' is missing from that.
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