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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel > Westerbeke - no start post inj. pump rebuild.
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


Thread: Westerbeke - no start post inj. pump rebuild. Reply to Thread
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Topic Review (Newest First)
07-05-2012 12:51 PM
Down2TheC
Re: Westerbeke - no start post inj. pump rebuild.

While that's true, it wasn't the cause of the previous failure. When I got the torque wrench I found that I had more than prescribed torque and a subsequent compression test proved that the injector install was fine. (tested via glow plug ports.)

As for the manual, I did that bleeding procedure many times because there wasn't much else to do. As rationalization I'm claiming that the shop found something wrong when they put it on the test bench. They had it in there for an hour before calling me in to see it working. Not sure if that's true... but it relieves me of responsibility for loss of a month on the water. So that's my story and I'm stickin' to it.

6 hours on the lake yesterday (where temps were 10-15 degrees cooler than the 99 on shore) made it all better anyway. I have a boat again so why ask why!
07-05-2012 09:26 AM
Stu Jackson
Re: Westerbeke - no start post inj. pump rebuild.

Quote:
Originally Posted by Down2TheC View Post
FYI - After pulling pump and injectors and taking them back to the shop, everything looked great on the bench. All injectors firing.

So I put it all back together and now it works like a dream. Can't figure out what was different so I have to conclude that the bleeding process requires the portholes to be open. That was the only difference today!

But it works so I won't question why. Thanks all for the suggestions.
G;ad to hear you had success. Betcha feel a LOT better.

What does your owner's manual say about bleeding? Sometime RTFM does actually help. Could it be that when you replaced them you torqued them correctly?
07-02-2012 02:24 PM
arf145
Re: Westerbeke - no start post inj. pump rebuild.

Hopefully, other Westerbeke owners are making a note of that little-known porthole requirement
06-28-2012 03:22 AM
Down2TheC
Re: Westerbeke - no start post inj. pump rebuild.

FYI - After pulling pump and injectors and taking them back to the shop, everything looked great on the bench. All injectors firing.

So I put it all back together and now it works like a dream. Can't figure out what was different so I have to conclude that the bleeding process requires the portholes to be open. That was the only difference today!

But it works so I won't question why. Thanks all for the suggestions.
05-30-2012 01:37 AM
Down2TheC
Re: Westerbeke - no start post inj. pump rebuild.

Injectors and pump are doing their job. Now I'm thinking I was just too much the wuss when torquing down the injectors. I did it by feel, but I'll go back with a torque wrench tomorrow. 12 ft.lbs. may be more than I'm thinking.
05-28-2012 03:16 AM
sigmasailor
Re: Westerbeke - no start post inj. pump rebuild.

Cannot place what you mean by crushable heat sheat, pictures would help.
If you test all 4injectorts you can hand crank the engine and see if pump and injectors deliver.
I agree with you that the sealing of the injectors in the head is a possible problem. Better make shure that was done as per manual. Did you forget to remove the previous washers and now have two?
05-27-2012 08:50 PM
Down2TheC
Re: Westerbeke - no start post inj. pump rebuild.

All good theories. But doesn't explain why it won't fire on WD40.

How about this... All symptoms point to loss of compression. What if the shop gave me the wrong copper washers that go around the nozzle nut on the injectors. That could explain weak to no compression in all 4 cyls. Shooting some soapy water around the base of the injectors and cranking should lead to bubbles if air is escaping at the base of each.

I'll have to check with my T37 forum and see if our injectors actually had those think copper washers. That's the only thing I didn't take a picture of as I broke things down. The injectors were and afterthought and didn't seem very complex so I just popped them out and delivered them to the shop. Can't recall what was on them when I popped them out. They do have that crushable heat shield at the tip.
05-27-2012 07:19 PM
dabnis
Re: Westerbeke - no start post inj. pump rebuild.

If you are getting fuel leakage or spray when loosening the pipe fitting the pump may be OK? Should get quite a bit if you loosen it a turn or two. Perhaps the injectors were set at too high a pressure rating and will not pass the fuel, or enough of it? Easy enough to take them back to the shop for checking. If it runs on WD-40 the compression is probably serviceable. You could put soap bubbles around the injector connections to see if there is air leakage around the connections, but that is probably a stretch. Possibly debris got into the lines when disconnected from the pump and is now plugging the injector tips? Probably another stretch. Maybe remove and blow out the lines? Maybe take both the pump and the injectors back to the shop for checking?

Paul T
05-27-2012 06:21 PM
Down2TheC
Re: Westerbeke - no start post inj. pump rebuild.

Thanks for all the quick traffic.

Only way I could see connecting the injector outside of the head would be to not have the return line hooked up so it would be sideways maybe. I'll take a peek to see if it's feasible. As long as I can catch fuel spewing from both ends, I guess it would be a good (albeit slightly scary) unit test of the injector rebuild.

History...
The W50 is a 1981 with low hours. Our Tartan 37 does daysailing mostly with a few cruises to the MI side of the lake. (We're in IL.) The past few season she started accumulating fuel in the sump at an increasing pace. Last season it got bad enough to find the source. The cutoff control on the injection pump was dripping at the stem. So I pulled it this Spring, had it rebuilt, and everyone said that with 32 years in service, might as well rebuild the injectors while I'm at it. So the shop did both. Other than some white smoke which I assume was a product of the injection pump, the engine was performing excellent throughout.

Timing on the W50 is a matter of 2 degrees play in the pump mount. I lost the scoring on the pump casing because I didn't know that the shop was going to put it through paint. But I matched the position using photos taken prior to disassembling. Other T37 owners claim that no timing available will make the engine not run. Only major smoke and maybe rough. Plus she'd run on WD40 with the timing off. So I don't think that's it, though I'm running out of things to do so I may try a twist if nothing else presents itself.

If nothing else works by Tuesday, I may have to bring in the pros ($$$) to get a compression test. Speaking of which... Could the injector mounting gear be an issue? Could we lose all compression because the shop gave me the wrong size internal washers or something? Mine has a copper ring over the injector nut and a crushable heatshield at the tip.
05-27-2012 04:51 PM
sigmasailor
Re: Westerbeke - no start post inj. pump rebuild.

Quote:
Originally Posted by CarelessNavigator View Post
Not to criticize, but that is a horrible idea.

If you bend the injector lines enough to do what you are saying you risk kinking the injector lines creating reduction in pressure and volume which could lead to reduced participation or an outright misfire, improper atomization of fuel causing the injector to clog then washing the cylinder down.



Bending injector lines is bad kids UH MMMMKay
Normally there is some clever way to connect everything without bending fuel lines. It's quick and easy and will narrow down on the problem. I should have pointed out not to bend the fuel lines.
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