13-12-2023, 12:17 AM
Having run our new improved sporty engine for five hours on the test bed we had a short spell of uneven tickover for about 2 mins followed by a total conk out. Having spent some time looking at things discovered we had water in number 2 bore. Now we have popped the head off I can see a tiny pinhole in the bore wall which was not there before or at least very well hidden. I have had a poke and despite my careful attention when boring the block in our milling machine can summise there is a large pit on the water side caused by corrosion leading to a tiny pinhole. My thoughts then went to sleeving the block and was wondering what is the best way forward. I can find a few different sleeves available but most are quite thin and would leave almost no material at the bore size I require. My understanding is when sleeving 2mm each side is good and 1.5mm minimum. I was wondering what other people have used sleeve wise.
Later design 2 bearing engine, just over +70 slipper pistons, pheonix crank and rods, trials cam and big flowed inlet valves, using an older screw coreplug block. One slightly miffed owner after all the work we have put in. I guess we have been lucky as another few mins of testing I would have shut the engine down ready to fit the engine then taken a couple of days off to fit. I guess finding the issue out of the car is a small blessing.
Later design 2 bearing engine, just over +70 slipper pistons, pheonix crank and rods, trials cam and big flowed inlet valves, using an older screw coreplug block. One slightly miffed owner after all the work we have put in. I guess we have been lucky as another few mins of testing I would have shut the engine down ready to fit the engine then taken a couple of days off to fit. I guess finding the issue out of the car is a small blessing.
