Quote Originally Posted by rjh-md View Post
I don't remember ever seeing liner seal problems in these old 315 and 318 engines , the liners are very thick walled ,and the fit is close between the block and liner .
Another factor is that these engines were low rpms ,and low horse power .same as the 3t ,d-7 s and 2U 8' even the earily low horse D-7E &D-8H's
I remember seeing a lot of problems with the high horse power D-8 H ,K ,and D-9 G,s Not with liner seal problems ,but with upper counter bore cracks
I was working for a local contractor ,and we had a new D-8 k with about 1000 hrs on it when it started pushing compression in the cooling system .
I tore that engine down under warrenty ,and found cracks in all of the counter bores .Counter bore problems seemed to be worse when Cat pushed up the horse power ,and operator's took full advantage of using every bit of it !
Thanks for all the comments ,its been enlighting .
RJH
Yeah, Cat don't know how to build a large bore diesel...That's why they bought EMD..To figure it out

I thought Cat's "fix" to stop large bore liners from dropping into the basement was the spacer plate design...the real fix was to stop production.