endian
10.06.2021 5:33:10
Personally I would start from scratch (ignore the marks you made on the distributor). [links]
See full version: Top Dead Center
Personally I would start from scratch (ignore the marks you made on the distributor). [links]
Not sure what you mean by "cylinder pattern"
Hope this helps.
so how can i tell if the valves are closed? just take off the valve cover and look? more
If you still have the valve cover off, it will be real easy to find TDC, just rotate the engine till cylinder 1 intake valve open and close then line up the marks on the balancer and timing pointer to 0. Drop the distributor in (may need to use a long flat head screw driver to rotate the oil pump drive to allow the distributor to drop in fully), with the rotor pointing towards cylinder 1. Take your cap, and figure out what the closest lug on the cap would be to the rotor when the cap is placed on the distributor. That will be the cylinder 1 lug. Install the rest of the wires on the cap going clock-wise while following the firing order.
It does matter where the lifters are.
#1 cylinder must be at the top of its stroke with both intake and exhaust valves closed. The distributor rotor button must line up with the cap pointing to the connector for the plug that is going to the #1 cylinder.
I'm assuming you are trying to find TDC to drop the distributor in, correct?
If so, the marks that you put on the cap for the rotor are going to mean squat unless there is the really odd chance the engine was at compression TDC on cylinder 1 when you pulled the distributor.
Locate the top dead center pointer on the crankshaft.
Attach a ratchet to the bolt in the center of the crankshaft pulley. more
Rotate the crankshaft counterclockwise until the two marks line up.
In a Honda engine, pistons travel up and down inside cylinders in the engine block and are driven by rods connected to the crankshaft. Top dead center is when the piston is farthest away from the crankshaft. Locating top dead center on the number one piston is critical to many engine overhaul processes such as replacing the timing belt and replacing the camshaft. more
Locate the top dead center pointer on the lower timing belt cover. It will be just above the crankshaft pulley.
Okay, so I can assume that if all marks line up correctly, then I am good to go. I wasn't sure if it were possible to line up all the marks but still have to adjust something else. I believe initially I only made one revolution to line up top dead center, so when I removed the head and placed them back as I removed them, I was putting them back 180* out thinking it was correct.
If things are not lining up according to the way the manual says they should, then there has to be something wrong somewhere. and of course, if you try to run the engine with the valve timing out of whack, at least on some engines, you will hit the top of the pistons with the valves and damage the engine. more
Any suggestions to assure that I have matched and correct timing before I put it back together and start it?
Okay. by this post I assume you have a manual, and that's good to know. Surely your manual has some illustrations of correct alignment. My 150 manual shows the timing marks on the crank sprocket and the cam sprockets, along with the colored links on the cam drive chain(s), and how they need to be aligned in order for everything to be right. more
Okay. by this post I assume you have a manual, and that's good to know. Surely your manual has some illustrations of correct alignment. My 150 manual shows the timing marks on the crank sprocket and the cam sprockets, along with the colored links on the cam drive chain(s), and how they need to be aligned in order for everything to be right.
Cams turn at half the speed of the crank, so the crank will be at top dead center twice while the cams make one revolution. But with the timing cover off and you see that the marks are lined up properly, then there's no way that the cams can be out 180. That's what all the marks are for. There should be marks on the block to align the crank, also there are sometimes marks on the head for initial alignment of the cam sprockets, which are aligned with the cams themselves with dowel pins, and there are specific links on the timing chain(s) that are marked also. If all are aligned correctly, it's impossible to be 180 degrees off.
I have a 1957 mark 55-E outboard. The question I have is this there are two timing marks on the flywheel one is a 0 with a line under it .The other is just a line the one with just a line is top dead center on # 1 piston. , the one with the o is about .250 before top dead center. What line do I use to time the engine by the belt to the arrow on the mag . I have looked at the book and can’t figure witch line to use.
Thanx more
top dead center and arrow.
Thank you very much I don’t much about the bigger motors I have always worked on 10 hp. and smaller with out electric start. I hope I get a spark the timing belt was broke when I bought it on a 1957 yellow Jacket wood boat.