Thread: 1200 Piston question
07-04-2014, 08:22 AM #1
1200 Piston question
I am rebuilding a 1200 carb engine. I am using a used set of pistons and cylinders with not too many hours. However there is carbon on the tops. Can someone help me with the piston direction? I think the open ring side should be towards the intake side and AWAY from the larger exhaust port. Is that correct?
07-04-2014, 08:43 AM #2
Yes,exactly correct. The WRONG direction will point directly to the exhaust and break rings.
07-04-2014, 08:46 AM #3
Perfect! I love this site. It really help to ask questions and get verification!!
07-04-2014, 08:59 AM #4
And don't forget to bolt the exhaust manifold in place before torquing the cylinders down permanently in order to get perfect alignment.
07-04-2014, 01:43 PM #5
Really??? I was not aware of that!?! So do you basically snug the cylinders down, then back them off by a 1/2 turn or so and then torque the exhaust on and then torque the cylinders down? I typically get all that black seal gasket stuff in place on the new gaskets and then torque them down on the block. I will change my approach if I 'm understanding appropriately...
07-04-2014, 04:42 PM #6
07-05-2014, 12:18 AM #7
- Join Date
- Jul 2007
- near Toronto, Canada
Cylinders get positioned and the cylinder base nuts are just snugged down, just barely untight to allow each cylinder to shift if necessary.
Exhaust manifold gets installed and torqued on dry, with no gaskets or sealant.
Once the cylinders are pulled into alignment with the exhaust manifold and the cylinder nuts have been torqued down to the block, remove the exhaust manifold, then reinstall with high temperature sealant (was gaskets on some engine years/versions).
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