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Old 10-09-2018, 08:43 PM   #1
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Westerbeke W30 white smoke and missing

I just purchased a used Westerbeke W30 and it is "missing" and puffing white smoke see video.


Compression is equal across all 4 cylinders around 400 psi. Pulled and pop tested injectors and spray pattern looks good. Also tested the injectors on the lines on the engine and pattern looks good. They are pintaux style injectors so I could not test them for presure setting. No blow by noted by removing oil filler cap which coincides with decent compression readings. When the engine is run above 1500 RPMs everything clears up.n The engine is on a skid right now so I cannot easily put a load on it.

New clean oil and I have it set up with an electric fuel pump out of a can. Everything should be pressurized so there should be no air leaks.


I am thinking pump or pump timing but thought someone might point me in the right direction.
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Old 10-09-2018, 09:05 PM   #2
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Sounds like a possible exhaust manifold leak. Was it connected to a coolant/water source? Could that coolant/water be leaking back into the intake some how or through the exhaust? It seems to only miss at idle and white smoke indicates water or coolant being burned off. Possibly a head gasket.
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Old 10-09-2018, 09:56 PM   #3
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Not unusual. Comp check and injector check is what I would have suggested. And you can pop test pintle injectors to check pressure setting.

Sometimes injector pump is set a little "heavy" on one cylinder, and next one will misfire cold. Warmed up, it might be all ok.

Get it in a boat and load it up. Things tend to clean up under load.
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Old 10-10-2018, 02:52 AM   #4
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White smoke is usually water or unburned fuel. Water can mean a bad head gasket, cracked head or cylinder wall. Unburned fuel could mean a cylinder isn't firing and the fuel is exhausted. If the cylinders all have the same compression then they're all reaching ignition temperature. One injector might not be firing. If you have a temperature gun, measure the temps of the exhaust ports or before the ports get too hot, feel with your hand. If one cylinder is cool, switch that injector with one from another cylinder and see if the problem moves.

If it moves, bad injector. If the problem doesn't move then it could be the pump, head gasket or cracked head/cylinder. Sometimes a injector will get gummed up from sitting too long with old fuel. A good fuel treatment helps clean injectors.
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Old 10-12-2018, 08:24 AM   #5
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I have not had a chance to get back to the engine yet. I did remove and clean up all injector nozzles. They are a Pintaux style nozzle. These nozzles have an axillary jet that only operates at low RPM and points toward the glow plugs. This is to aid in starting. At Higher RPMs both the main and Aux jets work. Because of this two jet system I read that a special set up is needed to set the pressure on them.

I believe the entire cooling loop on this engine is fresh water including the exhaust manifold. If there were a water leak anywhere I would think I would be smelling the glycol in the exhaust which I am not. I will have to confirm that raw water does not pass through the engine or manifolds anywhere.

The engine still smokes when run for over a half hour with coolant and engine oil warmed up.

Think I will move forward with using infrared to try and isolate, Change out nozzles with some used spares I have and make certain it is fuel vapor and not water.

I was thinking just installing it and giving it a good hard run but it is a pretty challenging install and not a vey easy place to complete any major work if needed.

Hopefully this weekend may answer some questions. Thanks for all the replies.
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Old 10-14-2018, 05:38 AM   #6
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"and make certain it is fuel vapor and not water."


Smell the exhaust.
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Old 10-14-2018, 07:39 AM   #7
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. Westerbeke used a Perkins 4-91. IF Westerbeke follows their established business model, engine parts from Westerbeke will cost you 3-4 times what you can source them from a Perkins source.
I Figger you are well aware of that factoid but still worth mentioning. I reallllllly despise the Westerbeke company for that and a few other service related reasons.
BTW, they do assemble and sell excellent equipment but their end-user attitude about the consumer sucks.
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Old 10-14-2018, 10:36 AM   #8
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Quote:
Originally Posted by Mule View Post
. Westerbeke used a Perkins 4-91. IF Westerbeke follows their established business model, engine parts from Westerbeke will cost you 3-4 times what you can source them from a Perkins source.
I Figger you are well aware of that factoid but still worth mentioning. I reallllllly despise the Westerbeke company for that and a few other service related reasons.
BTW, they do assemble and sell excellent equipment but their end-user attitude about the consumer sucks.
Mule, I have seen the W30 referred to as a 4-91 but yet to see anything relating to a Perkins 4-91 other than a few posts that mention it. I have seen it listed as a British Leyland 4-91, A BMC 1500 and Thornycraft 90. Also as an older model Westerbeke 4-91.

Boatdiesel.com does not list a Perkins 4-91 nor have I seen it listed in any other Perkins reference.

All the names I listed fall back to British Leyland or BMC as being the manufacturer.



A.S.A.P Supplies in the UK has the BMC parts for the W30 at reasonable prices.
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Old 10-14-2018, 02:34 PM   #9
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Tractor engines other industrial engines...fork lifts and so on....match Total displacement to all things Perkins. That is how I uncovered that I had an L3A Mitsubishi. It was a struggle even then but I finally got what I needed at 1/3 the price that Westerbeke offered for repackaged parts with their name on them. Rebuilding just the top end was not an option at their prices, maybe it would have made a good mooring ball anchor.
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Old 10-14-2018, 07:43 PM   #10
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To the OP, post a photo of the complete engine, should then be able to tell if it is Mitsubishi or Perkins.
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Old 10-15-2018, 11:50 AM   #11
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Ski, it is not a Mitsubishi. It is a BMC 1500. BMC later became British Leyland. Do either relate to Perkins?

The earlier production of this motor was a Westerbeke 4-91 and later became the Westerbeke W30.

I have seen mention of the 4-91 being a Perkins but cannot find any data anywhere to substantiate that. See the 4-107, 4-108 but no 4-91 as a Perkins. Just the for mentioned builders.
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