The '98 12v I found was a 53 block. I tow very heavy, so... didn't want to chance it. Is it possible to find a 12v '98 w/o a 53? (by posts on '53' it says 80% were '53's...?)


Have any 12V '53's cracked? (I would assume it is a function of heat, which I would guess a bombed 12v would be slightly higher than 24v.)

 

more 24 valves were built with the 53 block. From what i've read....

12 valve's with the 53 block seem rarer....

 

i have 3 98 12v's none are 53 blocks. but i think it may be a moot point on a 12v i have never heard of one crack on a 12v. heck fulmers truck has a 53 in it.

 

So did Maddogs, but he had to do some extra work to find out the truth. LOL

 

The 53 is a real you know what. When I bought my truck last year I knew nothing about it but now that I do I wouldn't have touched the truck. Only has 66,000 on it and just started leaking but thankfully I bought a 3 years 36,000 warrenty when I got it so I'm good to go The crack is very small right now, going to wait a little bit to make it bigger so its a clear cut problem so they can replace the block.

 

my buddy has a 98 12v 6 speed excab shotbed with twin turbos and it has 150,000 miles on it no problems yet, and some drag racing and truck pulling on it to.

 

Come on Don, we now need more details on Richards 53 block!

 

cummnz4x4pwr bought a cracked 53 12v to do a p-pump conversion on his ISB. I don't see why the 12v's would be special in not cracking blocks. Probably just that a cracked 53 is pretty rare to begin with, and couple that with the fact that 12v's only had the 53 for half a year.

 

I'm looking at a 98 12 valve and I'd like to know where to look for the "53" block and does it crack in one area?

Thanks

 

The mark 53 is behind the vacuum pump and it cracks just under the freeze plugs on the pass side will get to about 4" long the only ones that I have seen have been on the 24 v never seen one on a 12v

 

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