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+--- Thread: Engine Block Replacement (/showthread.php?tid=4812)
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RE: Engine Block Replacement - Bruce Nicholls - 18-08-2020
All four rods were cracked at the pinch bolt on my RP when I acquired it in 1971.
RE: Engine Block Replacement - cwchrisp - 18-08-2020
Much to consider, so thank you again!
I will keep this post and consult Woodrow again, keeping a list of all the tasks and order of work ready for winter.
It doesn't seem such a daunting task having read the replies here!
All my plugs were oiled up yesterday and the piston crowns I could see were well coated.
Chris
RE: Engine Block Replacement - Bob Culver - 18-08-2020
It is curious that so many conrods are apparently fretting at the gudgeon hole. With the small pinch bolt subject to a repeated cycles of loadng would expect fatigue failure. Apparently seating of the bolt deteriorates so rapidly that movement of the eye can occur unrestrained. (A local member with a 6 had a rod split full length. It was welded to repair!)
RE: Engine Block Replacement - Dave Mann - 19-08-2020
Having just acquired yet another good crankcase with all threads sound, front lip intact and no cracks but it had been sandblasted and left for a few years. After removing all the oilway plugs I spent an hour with a pressure washer and washed a pile of sand out of it. This revealed enough sand for a play pit and the top face was heavily fretted at the front and rear nearside corners which is why a lot of Sevens leak at this joint. By the time I'd trued the face up the number had almost. disappeared.