My Challenging MEP-002a's This is becoming frustrating.
I have 2 of these and one runs well with a livable oil leak (perhaps a quart a day) from the oil housing upper right where a bolt is broken off behind the fan (which I can't get off with a harmonic ballancer puller) got to find or make a heavier puller so i can get at the oil housing.
The other 5kw ran but had a broken glow plug so I swapped the head with a 10kw parts unit I have after asking y'all if that would work. I'm here to report the heads are interchangeable. Well, on removing the head, the center head bolt broke. Have been waiting for a week for a mobile diesel repair guy to drill out the bolt. Yesterday I had a conversation with a millwright friend who suggested heat, break free and a small pipe wrench on the 3/8" tall stud remaining, IT WORKED! The pipe wrench was key. I could not budge the bolt with vise grips or channel locks.
After replacing the head gasket and valve cover gasket and ensuring the IP was working and glow plugs worked and adjusting the valves, I fired her up. She ran and produced electricity but knocked like the devil and produced tons of white smoke. Shut her down and adjusted the valves again. Still heavy white smoke and a little voltage hunting under no load. Removed the air filter....no effect.
The smoke is continuous. Opinions? Recommendations?
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M101A3
MEP-002A 10 on hand!
Two to keep, 2 ready to sell.
Two being worked on.
Four being parted out.
Knocking means timing or delivery quantity is out of specification. It would help to compare the fuel control lever position at governed speed, this is a delicate measurement but you have a good comparison.
It could also be a leaking delivery valve, making injection pressure too low which causes the governor to call for more fuel, increasing the injection duration which makes for white smoke. The delivery valve can be removed without upsetting injection timing. If dirty, it can be lapped. If the center nut on the IP is hot, that heat is from an excessively leaking delivery valve.
This is a modified Bosch system that is far easier to diagnose as timing is fixed (no centrifugal advance) and the governor is external. Just a delivery valve and control collar.
You could also have the injectors pop tested and make sure they hold pressure. If the pop-off pressure is too low, timing will be advanced and it will knock with white smoke.
Lots to check but don't pull the injection pump until all other issues have been checked. If the CARC on the nuts securing the IP to the block is unbroken, timing is probably fine so leave it be.
I should have mentioned in my original post that I reused the injectors that had been in the original head
and functioned okay in it. Tomorrow I may try changing out injectors from the 10kw and see if it makes a difference
if no one come up with a solution.
Jerry
__________________
M101A3
MEP-002A 10 on hand!
Two to keep, 2 ready to sell.
Two being worked on.
Four being parted out.
Keith,
Thanks. I have had these IPs off and apart a couple of times. Never checked the temp of the IP center cap but will do so. I wasn't
sure how the delivery valve played in all this. I wonder if anybody has a spare delivery valve to sell.
Jerry
__________________
M101A3
MEP-002A 10 on hand!
Two to keep, 2 ready to sell.
Two being worked on.
Four being parted out.
Well, changed fuel injectors to the "different but same part number" ones that came off the mep-003a. They look to be in good shape. Unit won't fire and is getting no fuel....so, back to the originals that were on the mep-002a tomorrow.
__________________
M101A3
MEP-002A 10 on hand!
Two to keep, 2 ready to sell.
Two being worked on.
Four being parted out.
__________________
Jonathan
Secretary/Newsletter Editor, M.V.C.C. Denver, Colorado www.mvcconline.org
M.V.P.A. #32113
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The Following User Says Thank You to steelandcanvas For This Useful Post:
Have you checked to see if the injector pump is delivering fuel to the injectors? A sluggish IP will make purging the lines very slow. And if you didn't purge the lines by keeping the fuel line nut at the injector loose while cranking until you see fuel drip, it will take forever to purge the lines.
Professional tip here is to purge the lines with glow plugs removed. Faster cranking and less battery drain. Only do this with the fuel line nuts loose so there isn't any injected quantity. Flooding diesel engines is a bad thing.
Also, make sure the control lever is full up for maximum injected quantity. They have been known to stick in the down position, meaning no fuel injected.
My Challenging MEP-002a's This is becoming frustrating.
