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sherpa 1800D OLIVIER DIEUDONNE
AMAGNE, Alsace-Champagne-Ardenne-Lorra, France   FRA
Hello,

i am rebuilding a famous BMC 1800B series diesel engine, so i check the bore ovalisation with the good tool.

i have measured longitudinally, perpendicularly and at the middle of each 45 degrees so 4 points check all the deep of each bore.

1st piston bore have higher wear longitudinally, the maximum diameter i find is 80.44mm = 3.1669" and the minimum diameter i find in this same bore is 80.29mm = 3.1610"

so the maximum difference is 0.15mm = 0.0059"

standard piston are 3.1595" = 80.251 mm

Do you think i need to rebore the cylinders with oversize 0.020" ?

thanks by advance

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76lucas Avatar
76lucas Gold Member Josh L
Floyd, VA, USA   USA
1978 MG Midget 1500
1979 MG Midget 1500 "Blue "parts" Car"
1999 Subaru Legacy "Daily Driver"
You should probably ask a machine shop. Diesels have much higher compressions and require tighter tolarances.



If you never try to do it You will never be able to do it

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