ri702bill 9,533 #1 Posted July 14 (edited) I picked up the C81 from @Sparky last week. Immediately noticed a few things not "quite right" when the Service Replacement long block was installed. The drive pulley was not tight and the 1/4" square key was partially sheared into a "Z" shape. Fuel line and fuel pump inlet were packed with solidified rust. I pulled the fuel pump and carb to see if they were clean inside, only to find this!!! This engine had been running this way!! Edited July 14 by ri702bill 2 1 2 2 1 Share this post Link to post Share on other sites
squonk 43,939 #2 Posted July 14 I got a 1075 once and that gasket wasn't even there! 2 Share this post Link to post Share on other sites
Sparky-(Admin) 23,284 #3 Posted July 14 Nice to see it’s getting shown some love! That one has quite a bit of “previous owner hacks” that need to be eliminated. 1 Share this post Link to post Share on other sites
Kenneth R Cluley 595 #4 Posted July 14 NASCAR "throttle plate"? 1 Share this post Link to post Share on other sites
ri702bill 9,533 #5 Posted July 14 1 hour ago, Kenneth R Cluley said: NASCAR "throttle plate"? More like a Controlled Air Bleed. I never was a fan of restrictor plate racing... Share this post Link to post Share on other sites
oliver2-44 10,781 #6 Posted July 14 Since the carb and fuel pump are off, great time to pull the head/de-carbon, and open/clean the breather! Maybe even pull, clean and lap the valves Share this post Link to post Share on other sites
ri702bill 9,533 #7 Posted July 14 11 minutes ago, oliver2-44 said: Since the carb and fuel pump are off, great time to pull the head/de-carbon, and open/clean the breather! Maybe even pull, clean and lap the valves Great minds think alike??!! The head and valves were removed yesterday. There was a fair amount of carbon in the chamber - probably from a choke always on in the carb condition. Valve seats look excellent, but both valves showed imbedded wear at the contact surface. The fit from stem to guide is excellent for both. Chucked up both valves in the lathe to verify they were straight, blued up the faces and ground with coarse and fine cylindrical stones spinning in the opposite direction until the wear grooves just about disappeared. Next steps are lapping, cleaning and checking the cold clearance. Good times! 1 Share this post Link to post Share on other sites