Engine Casting
08-18-2005, 11:34 AM
#2
Chapter President
55 is good.....there have been some documented cases of them cracking in the same spot as the 53 but that appears to be an extremely rare occurrence. The risk is negledgable.
08-19-2005, 06:48 PM
#6
Administrator
Yep. 55 is good. The 53 is the one to avoid. It has the thinnest block casting and is prone to cracking. This was changed and the block was thickened in the 54 series and up. The blocks with the casting numbers were made by a Brazilion company called Tupy. There is also a Mexican company that casts them as well by a company called Teksid. Thier blocks are the beefiest around.
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08-19-2005, 06:52 PM
#7
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FWIW, I've heard that the Teksid blocks are stronger. These are the Mexican blocks. They can be identified by the LACK of a 53, 54, 55, etc onthe block near the pan rail. Instead, they just have a series of small numbers....
This was originally posted by Pit Bull on TDR:
Guess which one I have?
MEXICAN "56" BABY
This was originally posted by Pit Bull on TDR:
"1. Brazilian Blocks are cast by a company named "TUPY" and are marked such.
They are identified with cast evolution numbers.
#53's are TUPY's. #54 and later evolutions were improved to correct the block issues that the 53's had.
2.Mexican Blocks were made by "Teksid" these blocks to my knowledge never had a problem with cracking, as they are heavier duty by trait, but they did follow the evolutions and got thicker.
These blocks do not have the 2 digit "cast number" embossed on the side, instead a series of numbers that are unidentifiable to me.
The mexicans blocks were rumored to even be harder to machine do to a harder cast overall, basically better quality in my opinion.
Brazilian Tupys always seem to outnumber Mexican blocks during the ISB's production probably about 8 to 1.
So basically if there is a pattern number its brazilian, if there is a series of small numbers its mexican.
By the way the Mexican equivalent of a 56 pattern was the Heaviest ISB block of all.
I had a 2000 that had a Mexican block. I looked and looked for a pattern number and all I could find were the smaller series of numbers. When I bought my 2002 and checked the #56 inch high is very easy to see. If you don't see a #53,54,55,56 and only find a series of smaller around 1/2 numbers that are hard to makeout then you have a Mexican block."
They are identified with cast evolution numbers.
#53's are TUPY's. #54 and later evolutions were improved to correct the block issues that the 53's had.
2.Mexican Blocks were made by "Teksid" these blocks to my knowledge never had a problem with cracking, as they are heavier duty by trait, but they did follow the evolutions and got thicker.
These blocks do not have the 2 digit "cast number" embossed on the side, instead a series of numbers that are unidentifiable to me.
The mexicans blocks were rumored to even be harder to machine do to a harder cast overall, basically better quality in my opinion.
Brazilian Tupys always seem to outnumber Mexican blocks during the ISB's production probably about 8 to 1.
So basically if there is a pattern number its brazilian, if there is a series of small numbers its mexican.
By the way the Mexican equivalent of a 56 pattern was the Heaviest ISB block of all.
I had a 2000 that had a Mexican block. I looked and looked for a pattern number and all I could find were the smaller series of numbers. When I bought my 2002 and checked the #56 inch high is very easy to see. If you don't see a #53,54,55,56 and only find a series of smaller around 1/2 numbers that are hard to makeout then you have a Mexican block."
MEXICAN "56" BABY
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08-22-2005, 09:46 AM
#12
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On the right side near the heat exchanger, oil cooler, whatever that thing is. Between cylinders 3-4 (I think) From what I have read the more you bomb it the more chance of it cracking due to higher cylinder pressures, but some guys have had no problems.
Tom
Tom
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