Hello all. I have a question to ask if anyone here has had this experience. The 422 stroker small block in my Arrow is based on a 340 X block. 4.10 bore with 4.00 stroke. I'm currently having it freshened up at a reputable engine shop here in Maine. Last week the shop owner asked me to come over so he could show me something about my block. My immediate thought was what could this possibly be as the engine was running strong at the end of this past season. He showed me what he called 'cap walk' with the 3 middle four bolt caps. He told me that the outer portion of the caps even when torqued down are not sitting flush on the block surface. He told me that with the caps torqued down he could probably put a two thousandths feeler gauge between the cap and the block. He also showed me some discoloration on that portion of the caps ( around the outer bolt hole) and the corresponding area on the block. He called it 'cap walk'. He told me that as a result of this the crank main line bearings would be slightly oval instead of round. He said he's seen this in other X blocks but they were much worse than mine. The good news is he told me he could make this between 95 to 99% right and for what I do the engine would be fine. He told me the main bearings did their job and no issues with the K1 crank or K1 rods.
Has anyone here who has run a X block encountered this issue and, if so, what was the correction? Please don't tell me to ditch the X block and go with something else as that's not going to happen, at least not this time. Thank you.
Has anyone here who has run a X block encountered this issue and, if so, what was the correction? Please don't tell me to ditch the X block and go with something else as that's not going to happen, at least not this time. Thank you.
