I’m rebuilding my 79 cb650 engine.
The engine leaked a shit ton of oil from the rubber o-rings around the head gasket. (Common 4cyl problem on old Hondas.)
My engine fins have always been completely covered with caked on oil, grease and dirt. If you didn’t already know, the engine fins are what cool your engine. So to say the least, my engine prolly wasn’t properly cooling itself as much as it should have been. No matter how much I cleaned it, 2 weeks later it was gross again.
In my plan to reduce overall engine temperatures, and efficiency, I’m doing a new gasket kit, having the cylinder jugs measured, and having the cylinder head pressure tested to see if everything is still within spec. Possibly installing a cb750 oil cooler.
Step 1 – Get the engine apart
Step 2 – Clean everything
Step 3 – Have cylinder jugs and cylinder head tested
Step 4 – Reassembly with new gaskets, new piston rings, possibly oil cooler
August 23rd, 2010 at 4:52 pm
yea
August 23rd, 2010 at 5:00 pm
asdfadsfadfadsfadsfadsfadsfadfadsf
August 26th, 2010 at 7:44 pm
Great Site! Very excited to see that there are other vintage bike enthusiast out there.
What is required to separate the two halves of the engine? I got to replace a gasket to stop an oil leak. Thanks!
September 22nd, 2010 at 1:35 pm
Just to clarify, I never split the crankcase. We only took the head and cylinders off, which was super easy. Once you get all the bolts out, just use a rubber mallet to tap the cylinders and head loose.
-Ed