5 replies to this topic

[vanrebel]

im rebuilding a mtero 1275 engine for my van and having now stripped it down i have found it has piston liners in it , this maybe a total dim but i mesured the bore and its 70.545mm , i was planning to bore out to 73mm to give me 1340 but this would pass the outside of the liner any ideas or info would help .

[miniboo]

u can bore it out to 1340 well 1330 is the common bore

1275-1293-1302-1310-1330 then 1380 i believe

std+20+30+40+60 then to 73.5 for 1380

i may be wrong though

[Lomcevac]

Some 1275 blocks certainly were lined when there were manufacturing problems at the factory. I believe this was around 1982. I also have one of these block and would be interested to know whether they can be overbored.

I suppose that if the manufacturing issue was with the castings then it is no-go, but if it was a boring issue (some would say this is!) then we may be okay....

[miniboo]

just re-read the post!!!

surely if you are overboring then you could just go bigger than the liners thus it not being a problem.

liners might nave been used as a way or hiding a minor overbore possibly

[vanrebel]

[font=Arial Black]

Some 1275 blocks certainly were lined when there were manufacturing problems at the factory. I believe this was around 1982. I also have one of these block and would be interested to know whether they can be overbored.

[font=Arial Black]I suppose that if the manufacturing issue was with the castings then it is no-go, but if it was a boring issue (some would say this is!) then we may be okay....

thanks for letting me know this as i thought i had the only one , im gettin the liners pushed out 2moro and am crossing my fingers that it is going 2 be ok . ill let you know .

[Lomcevac]

Thanks Reb, I'll be very interested.