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Post by Woodbeef on Mar 14, 2002 1:22:29 GMT 1
Every now and then I hear about the problems with Ford's parent metal bore blocks going porous.
Which ones were prone to doing this?
From what time period?
Which models?
How many hours did it usually take to manifest itself?
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Post by Si on Mar 14, 2002 21:02:13 GMT 1
The Blocks that go porous are from the 80's. There is no time limit, I have seen them go at 2000hrs, a yesterday I valued a teleporter with original Ford engine @ 8000hrs. To check engine unscrew oil filler cap and look for milky residue
Cheers
Simon
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Post by me@spamblock.com on Mar 16, 2002 0:51:58 GMT 1
According to Stuart Gibbard's "Ford Tractor Story - Part 2" the cavitation problems occurred in the early eighties and was most prevalent in the early series 10 4 cylinder models - 5610, 6610, 6710, 7610 and 7710 - "which, because of the nature of their design, have inherent secondary vibrations."
"..... shock waves caused by piston movement formed vacuum bubbles (in the coolant) that imploded with such force against the cylinder wall that they literally tore a piece of metal out of it. This eroded surface also tended to corrode, eventually leading to penetration of the block."
Stronger ribbed blocks (From July 83) and the use of an additive in the coolant solved the problem.
I assume the use of the additive in older machines would reduce or eliminate the problem.
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Post by orange on Mar 16, 2002 10:22:17 GMT 1
The ribbed block and additive did help, but it did not cure the problem, I have seen some of the ribbed blocks go porous aswell, I think all it did was delay the problem
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