MCI 9 Powertrain options?

[eagle19952]

sounds like the liners are moving....

[jmblake]

I don't know Donald, There is something wrong, and it is driving us nuts, if I had to do over again I would have went with detroit parts instead of aftermarket. I'am not sure if thats the proplem or not but I don't know what else to think.
Jason

[luvrbus]

Bad liners( are you using aftermarket ?),out of round cylinder wall,bad fit,bad rod or the center bore that is about all that would cause it. I am sure he is shimming the liner height if needed  
My friend Geoff a couple of years back had a 71 series that would take out the number 5 piston,rod and bearing I don't how he resolved that issue I never heard    


good luck

[jmblake]

Yes Cliff they were aftermarket rebuild kit by Interstate mcbee (SP) Its not the same hole we are on the third different hole. the new liners are detroit and as far as I know he checks the linner height.
Jason

[luvrbus]

Bad batch of liners I bet it happens several years back we had run on bad valves causing them to snap and drop 
Send one back to McBee and have tests ran they want to know if their product is bad finding the right person there could be a problem though

[jmblake]

Thanks Cliff, Thats what we are leaning towards, he is going to take the head off tomorrow and take one of the still intack liners out and mike the lip around the liner to see if its the same all around. He was thinking maybe the lip isn't machined evenly and not sitting flat in the block. I guess we are just fishing at this point.

[TomC]

When I first bought my AMGeneral, the gentleman who bought it straight from Portland, Or. Metro said they had overhauled the engine the 65,000mi ago that were on the speedometer. I put on maybe another 6,000mi when it was overheating-not by the coolant, by the performance and oil temp. I decided it needed to be opened up. I had it towed from above Bakersfield to my shop in Whittier. They pulled the entire engine/transmission cradle out and took the heads off. Yes the liners looked new with new pistons. But-the cylinders in the engine block were out of round and didn't have a good contact with the liners. We had the engine block (8V-71) bored out .010 and put in .010 outside oversized liners with standard interior bore so I could use the same pistons with new rings. Amazing how much hotter the coolant ran when the engine is properly transmitting the heat from the liner to the block (since 71 series are dry liners). Maybe new liners are necessary. Good Luck,TomC