IvaTiger
Gold forum user
- Joined
- Feb 8, 2017
- Messages
- 569
- Points
- 28
You Bet It Is
I think the rule is .001 per inch diameter so being 3.800 bore somewhere about .016 should be good.
after pulling the engine taking the heads off the engine was still stiff in a couple of areas when I tried to rotate it , so off came the oil pan and a ridge reamer removed the ridge. Each piston was tapped out from underneath with a couple being slightly harder to remove. One cylinder had some dehydrated coolant Chrystalized junk which was the culprit for a stiff area , it only had minor surface rust on the bore.
after measuring the bore taper on all 8 cylinders it is determined that .008 taper is too much so a rebore is needed I was using an inside mike to measure but getting that amount of taper with a mike must mean there are larger numbers and out of round considerations. The photos are showing another piston where the rings are so stuck in their grooves that even soaking with all kinds of magic solutions over many months did not free them when they were still in their bores. There must have been so much blow by with all that ring end gap and accounts for the build up of crud on the piston Puzzling thing is all the piston skirts are showing no sign of wear or burnishing.
The photos are showing one measurement of 3.802 and 90 degrees at 3.806 and the dial caliper at .170 ring gap. Because there is .154 extra ring gap is all that wear coming from the outer edge of the ring on the cylinder or was it not checked properly on its initial assembly. Am I right in thinking there should be a touch under .016 ring gap ?
any thoughts and suggestions are appreciated
Thanks
I think the rule is .001 per inch diameter so being 3.800 bore somewhere about .016 should be good.
after pulling the engine taking the heads off the engine was still stiff in a couple of areas when I tried to rotate it , so off came the oil pan and a ridge reamer removed the ridge. Each piston was tapped out from underneath with a couple being slightly harder to remove. One cylinder had some dehydrated coolant Chrystalized junk which was the culprit for a stiff area , it only had minor surface rust on the bore.
after measuring the bore taper on all 8 cylinders it is determined that .008 taper is too much so a rebore is needed I was using an inside mike to measure but getting that amount of taper with a mike must mean there are larger numbers and out of round considerations. The photos are showing another piston where the rings are so stuck in their grooves that even soaking with all kinds of magic solutions over many months did not free them when they were still in their bores. There must have been so much blow by with all that ring end gap and accounts for the build up of crud on the piston Puzzling thing is all the piston skirts are showing no sign of wear or burnishing.
The photos are showing one measurement of 3.802 and 90 degrees at 3.806 and the dial caliper at .170 ring gap. Because there is .154 extra ring gap is all that wear coming from the outer edge of the ring on the cylinder or was it not checked properly on its initial assembly. Am I right in thinking there should be a touch under .016 ring gap ?
any thoughts and suggestions are appreciated
Thanks
