Verifying block year for Head Bolts/Studs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BR3W CITY · 07-23-2015, 11:55 PM

Since I've got a massive stack 'o' parts in the corner, its about time I get around to ordering some ARP head bolts so I can do the new heads I've had on the bench for almost a year. At some point in 2004, GM switched from a variable length set of bolts, to a single size of head bolt....the problem is knowing which one you need if your ANYWHERE near the switchover point.

My block is a 12553164, which is the standard iron block made from late 98 into 2004. It was from a 2003 fleet van (and vans in general could come with a weird array of last-years and next-years parts)...

The front passenger side of the block has "2162", which if I understand means "February 16 2002" casting date. Is this correct, or did I miss-indentify these numbers?

07-23-2015, 11:55 PM	#1
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Verifying block year for Head Bolts/Studs Since I've got a massive stack 'o' parts in the corner, its about time I get around to ordering some ARP head bolts so I can do the new heads I've had on the bench for almost a year. At some point in 2004, GM switched from a variable length set of bolts, to a single size of head bolt....the problem is knowing which one you need if your ANYWHERE near the switchover point. My block is a 12553164, which is the standard iron block made from late 98 into 2004. It was from a 2003 fleet van (and vans in general could come with a weird array of last-years and next-years parts)... The front passenger side of the block has "2162", which if I understand means "February 16 2002" casting date. Is this correct, or did I miss-indentify these numbers? __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD



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