On my 1983Catalina 30 the M25 has the timing hole by the starboard aft engine mount. I have turned the engine over by hand many times and do not see any timing marks. I want to set my valves correctly and need some advise please.
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R
Ron H
Not sure but try this
Here's a link to M-25 valve adjustment instructions. http://www.marinedieseldirect.com/universal/200157/universal-owners-manual-diesel-valve-adjustment.html
Here's a link to M-25 valve adjustment instructions. http://www.marinedieseldirect.com/universal/200157/universal-owners-manual-diesel-valve-adjustment.html
J
John Visser
not necessary
You just need to make sure that for the valve that you're adjusting the valve is closed and the follower for that valve is on the "flat" part of the cam. The way to do this is to turn the engine until the valve is all the way open, and then turn the crank 180 degrees from there. Adjust it, and tehn move to the next valve. Re-check all of the clearences. The compression release must be re-adjusted after the valve cover is re-installed. jv
You just need to make sure that for the valve that you're adjusting the valve is closed and the follower for that valve is on the "flat" part of the cam. The way to do this is to turn the engine until the valve is all the way open, and then turn the crank 180 degrees from there. Adjust it, and tehn move to the next valve. Re-check all of the clearences. The compression release must be re-adjusted after the valve cover is re-installed. jv
4
4 OH ONE ( K ) C-36
Timing
Get a Universal Engine Service Manual and follow the procedures. I have Service, Parts and Owners manuals, everything ( alomost )is covered.
Get a Universal Engine Service Manual and follow the procedures. I have Service, Parts and Owners manuals, everything ( alomost )is covered.
J
John Visser
More
The way I read the initial note, John of Huntington, LI can't see/read the timing marks; so getting the manuals isn't going to help. He should have the books, though. In any event, the link Ron provided provided is indeed the relevant passage from the manual, and has all the info needed to adjust the valve clearence (0.145 mm (.0057") min., 0.185 mm (.0073") max.). Maybe the same source has the compression release adjustment procedure. The marks are on the edge of the flywheel, and are not very deeply or boldly engraved. I just had this part of the engine apart, so I know they are there. To see them through the access hole, I would get close and use a very bright light. You might be able to touch them up with some paint on a Q-tip. The total amount of valve movement is 245 degrees of crankshaft rotation, from just beginning to open to finally closed. This is 122.5 degrees of camshaft rotation. Its very easy to get each valve's cam follower onto the flat part of the cam in order to adjust the clearence. Just watch for valve opening as you turn the crank (valve open is when the valve stem is depressed by the rocker arm). From where its fully open, turn the crank 180 degrees and you'll be closed, and ready to adjust that valve. Repeat this for each valve. Note that you can check your work easily, since the clearence you are setting is the maximum valve clearence, and you can turn the crank and keep checking the valve clearence for maximum (don't leave the guage in while turning). By the way, you might want to make sure the rocker arm assembly is tightened correctly. I actually checked the tension of the head bolts first, which requried removing the rocker arm assembly. Also note that the compression release mechanism must be adjusted any time the valve cover is removed. Note that if this is not adjusted correctly, the valves can hit the pistons. (I just completed this on my engine. Most of the valves were very loose, meaning they weren't opening fully in operation. The engine runs much better now that they are adjusted properly. This is probably the most important thing that is often not done on these engines.) jv
The way I read the initial note, John of Huntington, LI can't see/read the timing marks; so getting the manuals isn't going to help. He should have the books, though. In any event, the link Ron provided provided is indeed the relevant passage from the manual, and has all the info needed to adjust the valve clearence (0.145 mm (.0057") min., 0.185 mm (.0073") max.). Maybe the same source has the compression release adjustment procedure. The marks are on the edge of the flywheel, and are not very deeply or boldly engraved. I just had this part of the engine apart, so I know they are there. To see them through the access hole, I would get close and use a very bright light. You might be able to touch them up with some paint on a Q-tip. The total amount of valve movement is 245 degrees of crankshaft rotation, from just beginning to open to finally closed. This is 122.5 degrees of camshaft rotation. Its very easy to get each valve's cam follower onto the flat part of the cam in order to adjust the clearence. Just watch for valve opening as you turn the crank (valve open is when the valve stem is depressed by the rocker arm). From where its fully open, turn the crank 180 degrees and you'll be closed, and ready to adjust that valve. Repeat this for each valve. Note that you can check your work easily, since the clearence you are setting is the maximum valve clearence, and you can turn the crank and keep checking the valve clearence for maximum (don't leave the guage in while turning). By the way, you might want to make sure the rocker arm assembly is tightened correctly. I actually checked the tension of the head bolts first, which requried removing the rocker arm assembly. Also note that the compression release mechanism must be adjusted any time the valve cover is removed. Note that if this is not adjusted correctly, the valves can hit the pistons. (I just completed this on my engine. Most of the valves were very loose, meaning they weren't opening fully in operation. The engine runs much better now that they are adjusted properly. This is probably the most important thing that is often not done on these engines.) jv
J
John
Timing
I have all the manuals and have adjusted the valves on this engine before. What I am saying is that no matter how many times I turn the engine over SLOWLY by hand and look into the timing inspection hole there are no marks, letters, symbols, or anything. The surface seen when looking in the timing hole is mostly bluish in color, some orange speckled paint as if from a spray can. Nothing else. According to the manual there is also timing marks for the fuel injection.
I have all the manuals and have adjusted the valves on this engine before. What I am saying is that no matter how many times I turn the engine over SLOWLY by hand and look into the timing inspection hole there are no marks, letters, symbols, or anything. The surface seen when looking in the timing hole is mostly bluish in color, some orange speckled paint as if from a spray can. Nothing else. According to the manual there is also timing marks for the fuel injection.
J
John Visser
Wow
That's odd. Mine has the marks. I'm sure I could feel them if I put a finger in the flywheel edge as I turned the crank. Could it be that yours simply doesn't have the marks??? You'd have to attach a degree wheel to the front of the crank to adjust the injector pump. Why not call Universal and ask?
That's odd. Mine has the marks. I'm sure I could feel them if I put a finger in the flywheel edge as I turned the crank. Could it be that yours simply doesn't have the marks??? You'd have to attach a degree wheel to the front of the crank to adjust the injector pump. Why not call Universal and ask?
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