98 12 Valve To 24 Valve. What Month?

98 12 Valve To 24 Valve. What Month?

09-15-2008, 01:00 PM

#1 (permalink)

RHestand

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Join Date: Jul 2006 Location: Santa Cruz, Ca & Marinette, WI Posts: 592

98 12 Valve To 24 Valve. What Month?

As per above title, what month on the ID plate would show when they started inst. the 24 valve engines in the 1998-1/2 trucks?
I tried doing a search, but I couldn't get to first base on this.
I'm shopping for a 12 valve, and it would help me when talking to someone on the phone. A lot of people I talk to, don't know, or care if there 98 is a 12 valve or a 24 valve.
I know early 98s had 12 valves, and 98 1/2s had 24s, but did the factory actually switch over in June or July?
I'm sure this info. is available somewhere. So if you guys could check your 98 truck's, or your library for info. on this and get back to me it would be very much appreciated.
Thanks, Ray

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