Ebay engine block

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ollek
Posts: 3820
Joined: Tue Apr 10, 2012 1:20 pm
Location: South West Finland

Post by ollek » Mon May 21, 2012 3:54 pm

The main bearing caps are machined separately for each engine and the caps are not interchangable. The line boring is only one issue, the other one is the machining of the seat for the thrust bearings. Using caps from a other engine will result in the face on the upper and lower half being out ot line. This can also be machined, but then there will be no thrust bearings available because the measurement between the two faces will be smaler than the thrust bearings are ment for. A block without the original main bearing caps is scrap.

Eric_T
Posts: 1408
Joined: Sat Dec 31, 2005 11:57 am
Location: North Wales

Post by Eric_T » Mon May 21, 2012 4:19 pm

Gentlemen,

I am astounded with the level of shear guff thats being talked on this forum recently. many posts on this topic being just one example.

Please contain your posts to informed, accurate dialouge that may be of benefit to others, otherwise, someone is going to do some very expensive damage to a tractor following what they read on here.

The point of this forum is to help others, not to massage your own ego about how much DB trivia you may know, neither is it a race to be top contributor by making every other post yours.

There are some very clever, experienced, interesting people who we are lucky to have on this forum. people who willingly give up their hard earned knowledge for the benefit of others, those people are being recently drowned out.

You have just read my last post for a while.

Emyr

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richbug
Posts: 1358
Joined: Mon Mar 22, 2010 5:32 pm
Location: Pennsylvania, United States of America

Post by richbug » Mon May 21, 2012 5:01 pm

ollek wrote:the other one is the machining of the seat for the thrust bearings. Using caps from a other engine will result in the face on the upper and lower half being out ot line. This can also be machined, but then there will be no thrust bearings available because the measurement between the two faces will be smaler than the thrust bearings are ment for. A block without the original main bearing caps is scrap.
Been there, done that. In an extreme case, the solution to this is a machined bronze thrust washer, held in place by brass pins. This was the solution to not using one of the $4000 at the time block assemblies from Case. If it every quits and needs torn down(unlikely), I will snap some pictures with a tutorial on how to do it(my dad is a retired toolmaker, child's play for him). This will also fix one that has had the center cap and recesses damaged.

Otherwise I have .005" thicker than normal thrusts, if it happens to be close.
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jimc1390
Posts: 2253
Joined: Sun Jan 11, 2009 10:27 pm
Location: cornwall

Post by jimc1390 » Mon May 21, 2012 9:47 pm

emyr i completely agree, far too much guess work on here,
db 990 selectamatic
case ih 1594 com ed
db 1390 gd90 loader

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