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View Full Version : What is the difference between a rh and Lh rotation engine



tfg111
07-16-2006, 11:28 AM
What is the difference between rh and Lh engines? Is it just a matter of cranking the engine the opposite way and changing the firing order or are there major mechanical differences?

scott_s
07-16-2006, 09:22 PM
yes

tfg111
07-16-2006, 09:29 PM
yes what?

scott_s
07-16-2006, 09:53 PM
sorry for the cheap shot. couldn't help myself. many differences. not just spinning backward. what did You have in mind?

tfg111
07-17-2006, 08:48 AM
my engine is a rh rotation and the salt water has rotted the water jacket thru to the outside so now it is leaking water into the bildge. I came across a low mileage car motor with a good block and I wanted to know if it could be converted to run rh?

BJ
07-17-2006, 10:36 AM
"It is doable, but hardly a reasonable project. By the time your thru swapping out cam, distributor. manifolds. fuel pumps, etc.etc. you would be far ahead to replace engine with a good used or rebuilt marine rh engine."

BJ
07-17-2006, 10:36 AM
"It is doable, but hardly a reasonable project. By the time your thru swapping out cam, distributor. manifolds. fuel pumps, etc.etc. you would be far ahead to replace engine with a good used or rebuilt marine rh engine."

fastjeff
07-19-2006, 09:07 AM
"A reverse rotating engine has the pistons in backwards, along with a cam that has the distributor gear ground backwards (so it turns the distributor and oil pump the right way). Some engines---Chrysler, for example--use a different rear main seal, but the rest of the engine is pretty straight forward.

Jeff

PS: Be sure to use brass freeze out plugs and marine stainless head gaskets."

tfg111
07-19-2006, 03:33 PM
thanks for all the info.