Diesel Struggles Under Load

[strqaightv8]

Got the injectors clean and reinstalled, checked the lift pump, it ran fine, reinstalled everything and got ready to go, and then snapped a banjo bolt. So it'll be a few days till that shows up in the mail, and I'm getting towed tonight


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[HappyMdRSailor]

Originally Posted by strqaightv8

Got the injectors clean and reinstalled, checked the lift pump, it ran fine, reinstalled everything and got ready to go, and then snapped a banjo bolt. So it'll be a few days till that shows up in the mail, and I'm getting towed tonight


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Love the dice too... But it takes me a couple days to fire on all cylinders playing craps...

Aww Man... The "Old Snapped the Banjo"... Very similar to the first cousin "Dropped the Banjo in the Bilge" but with more immediate reality...

Only a short delay.... We'll get ya goin' one way or another...

[strqaightv8]

Ok guys, I'm back after a long delay. Life sucks sometimes. I might be in business, got everything back together today and routed a delivery a return line right to/from the motor, the problem is still there, but significantly reduced, I only see a ~200 rpm drop when put in gear, and I couldn't tell ya if that was normal or not. So I'm replacing all fuel lines this week, take a little test spin this weekend and see how she runs


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[strqaightv8]

If anyone's still around, new fuel lines didn't fix the problem, got the injector pump rebuilt, now the problems worse and she's pouring black smoke under load


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[Jim Cate]

Originally Posted by strqaightv8

If anyone's still around, new fuel lines didn't fix the problem, got the injector pump rebuilt, now the problems worse and she's pouring black smoke under load


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Aww, ****!

Or did you already say that?

Wish I could offer advice, but will let folks who actually know something do it.

Good luck!

Jim

[MBWhite]

Originally Posted by strqaightv8

If anyone's still around, new fuel lines didn't fix the problem, got the injector pump rebuilt, now the problems worse and she's pouring black smoke under load


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Have you double checked the timing? It seems like you have done most everything else. General rules of thumb are that if it smokes more under medium/high the pump timing is retarded, and if it smokes more under low/medium speed the pump timing is advanced. Also... This last one requires a tiny bit of finesse but a retarded pump will have the engine clattering less, and often when they are too far advanced you can tell they are clattering a bit more harshly than normal engines are wont to do.

Good luck and hang in there!

Mark

[HappyMdRSailor]

Originally Posted by strqaightv8

If anyone's still around, new fuel lines didn't fix the problem, got the injector pump rebuilt, now the problems worse and she's pouring black smoke under load
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Try running your supply and return lines straight to a jug again... See if there's ANY difference...

Originally Posted by Jim Cate

Aww, ****!

Or did you already say that?

Wish I could offer advice, but will let folks who actually know something do it.

Good luck!

Jim

Don't let Jim fool ya... He knows more than he lets on...

Originally Posted by MBWhite

Have you double checked the timing? It seems like you have done most everything else. General rules of thumb are that if it smokes more under medium/high the pump timing is retarded, and if it smokes more under low/medium speed the pump timing is advanced. Also... This last one requires a tiny bit of finesse but a retarded pump will have the engine clattering less, and often when they are too far advanced you can tell they are clattering a bit more harshly than normal engines are wont to do.

Good luck and hang in there!

Mark

Agree with this possible theory too after the IP rebuild and install ...

[strqaightv8]

Originally Posted by HappyMdRSailor

Try running your supply and return lines straight to a jug again... See if there's ANY difference...



Don't let Jim fool ya... He knows more than he lets on...



Agree with this possible theory too after the IP rebuild and install ...

I'm getting cranking now, I'll try again with aux lines to a jug.

It's very possible the timing is off; first, due to the mechanical pump the timing check process is a bit archaic so it is tough to tell if it's quite right, second, you adjust timing by inserting or removing shims between the pump flange and the block, the pump flange looks like it might have been ground down a little, which would equate to an advance in timing.

I'm going to scrape the prop and give her a run first, check out the smoke a little better now that it's daylight


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[HappyMdRSailor]

Originally Posted by strqaightv8

I'm getting cranking now, I'll try again with aux lines to a jug.

It's very possible the timing is off; first, due to the mechanical pump the timing check process is a bit archaic so it is tough to tell if it's quite right, second, you adjust timing by inserting or removing shims between the pump flange and the block, the pump flange looks like it might have been ground down a little, which would equate to an advance in timing.

I'm going to scrape the prop and give her a run first, check out the smoke a little better now that it's daylight


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Know of the shim timing mechanism, but haven't done one... Seems simple...

Keep at it man... We're not gunna abandon ye!

[four winds]

If something changed or got worse after the IP r & r, that indicates something went amiss during that process. Possibly compounding the troubleshooting challenge by introducing another issue into the mix.

Did it have any shims installed when you removed it?

If no shims were present and the mounting flange is actually surfaced off some, it probably had excessive wear on the can lobes that drive the IP plungers or on the plunger rollers themselves.

Just thinking out loud here. But I think resolving this new tissue would be the first step to get back on the right track.

Did you do anything else while the pump was off getting checked?

[strqaightv8]

First, running the motor. Fired up fine, but a grey/black discharge from the exhaust that sat on the water surface came out for the first few seconds, warmed up, as soon as I put it under load I started see grey smoke that got worse the more gas I have it. I'm tied up to the dock but the smoke was apparent and worsening before I limited out my ropes, as soon as it's back in neutral the smoke goes away. For the first time ever she over heated, this may be due to a loose v belt though, I tightened that up already.

I also saw air bubbles coming into my coolant overflow, am I looking at a head gasket?

Now for the pump
It had 1 shim installed which I cleaned and reinstalled with the pump. I'm not positive the pump was touched, it just came back a lot shinier than it went and had wear patterns indicative of some grinding, but I can't say for sure those weren't always there

I agree with your analysis, I don't think the black smoke is a symptom of my underlying problem, I believe it's a new and separate problem.

Gonna let her cool down, try running again with the tightened belt and check for overheating, bypass the filters and run out of a jug, keep an eye on the bubbles in the tank, and smell my exhaust gas for coolant


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[HappyMdRSailor]

Probably and hopefully just overheated... = bubbles...

So we're veering from the original problem... Do we still have a major loss of power under load??? Or now are we at:

This think smokes like a crack whore... ???

Smoke points to unburnt fuel... timing...

[strqaightv8]

The current list of problems are:
Major loss of power under load
White smoke upon startup that gradually lessens unless I rev it hard in neutral
Black smoke under load that gets worse as I increase revs
Overheating
Eating coolant
Smoke coming from random area(brand brand new problem, I believe a coolant line blew somewhere, could explain loss of coolant, overheating, and possibly bubbles)

However, the limited use of the motor has definitely improved since replacing the fuel pump

Having been a repower, I have no real idea if the hours on the motor, and no clue about the PO's maintenance habits, I think I just got real lucky and had everything crap out on me at once. Oh yeah, now my starter solenoid is going as well


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[strqaightv8]

After more reading, I'm feeling more confident about a head gasket, the leak could be coolant escaping underneath the exhaust manifold, which is right where it's coming from


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[HappyMdRSailor]

Given the extensive list of symptoms, I think you may be right...

Get a loaner coolant pressure tester, or devise a makeshift one yourself...

edit: There's no harm making a Mai Tai and pouring a few sips into the coolant reservoir... At least you'll have most of tasty cocktail to ponder with...