1380 & Mg Block
#1
Posted 20 August 2007 - 08:26 PM
Cheers
Alan...
#2
Posted 20 August 2007 - 08:29 PM
probably best to use a different block though to be honest
#3
Posted 20 August 2007 - 08:40 PM
they should just bore out the sleeves aswell right?
my 1430 has linings inserted......
#4
Posted 20 August 2007 - 11:04 PM
It is a gamble if you use these blocks as once bored the porous flaws may still be present, and you have then wasted your money. Either it bores fine or it doesnt, and personaly not worth the risk or money.
#5
Posted 20 August 2007 - 11:33 PM
they often have blocks at mini machinists, i think southam said 30 or 50. Not too bad. i found liners in mine too! 20% of rover 1275's apparently had liners fitted in the factory, they would machine them slightly too much for 1275 pistons, have to take it out further and fit liners, so the block is probably fine in return to sprocket! lol YAY british engineering
Edited by alexcrosse, 20 August 2007 - 11:35 PM.
#6
Posted 21 August 2007 - 12:28 AM
My statement stands regarding the reason for the liners!
#7
Posted 21 August 2007 - 10:16 AM
basically, youve had bad luck, another block is in order. As i said, u can only go to 1293 with liners. 1380 is offset.
#8
Posted 21 August 2007 - 04:21 PM
Spoke to the machinist today, he's going to remove the linings & set it up for offset boring & see what happens. He's not doing it till Thursday so I suppose I could look for another block as well. Anyone got a very cheap one near Sheffield?The question you have to ask yourself is why the sleaves were fitted in the first place. It is very unlikely that it has been sleaved to keep the original pistons due to the original bores being worn, this is a costly exercise and a new set of +20 pistons and an overbore is usualy cheaper. So, to the real reason liners/ sleaves are fitted. They are fitted at the factory to recover what would normaly be rendered scrap due to porous castings.
It is a gamble if you use these blocks as once bored the porous flaws may still be present, and you have then wasted your money. Either it bores fine or it doesnt, and personaly not worth the risk or money.
Alan...
#9
Posted 04 September 2007 - 04:29 PM
Alan...
#10
Posted 04 September 2007 - 06:03 PM
Theres loads there mate, dont know how you managed to get 3.3mm there though, what offsets did he use to machine it.
My 74mm block has only 2.5mm between the center bores and that was with a 10 thou offset
#11
Posted 04 September 2007 - 06:07 PM
Alan...
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