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Is the red and the blue 253 the same engine internally or does anyone know what is the difference between the two.
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it was more to do with head design and intake for newer pollution regs on the blue motor as i think the blocks are the same.
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Early red (up till basically the end of HQ) are neoprene rear main seal. Blue engines have longer sockets for the inner 4 x head bolts (2 each side) - the ones that protrude out into the valley. There are also two different red head designs plus the blue |
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Early red (up till basically the end of HQ) are neoprene rear main seal.
Does anyone know up to what engine number used a neoprene seal.
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Blue and black heads are also the same, therefore the black heads can go on the 253 even though there is no Black 253.
James
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You only have to be in front at the end of the race. |
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quote:
Originally posted by HotRodder
Early red (up till basically the end of HQ) are neoprene rear main seal.
Does anyone |
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253 blue motor cranks also run a different counterwieght to red motors
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Greg
You sure? Ive never looked that close but I always thought they were the same.
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byron,yes im sure...pointed out to me by the race car guys that buy all my 253 motors...they will run blue blocks but wont run blue cranks so i just supply them with red cranks..blues wont rev as had as reds because of different counterwieght..
going t |
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Well there you go - learn something new everyday! Odd though that 253 and 308 rope seal cranks kept their same part numbers from mid HQ right up till the end of 253 and 308. I would have thought that if the cranks changed spec the part numbers would too, Edited by user Thursday, 11 December 2008 4:10:26 PM(UTC)
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