Showing posts with label 4108. Show all posts
Showing posts with label 4108. Show all posts

Wednesday, 19 April 2017

Perkins 4108 re built engine for sale


Perkins 4108 marine engine rebuild


The Perkins 4108M diesel engine is one of the classic diesel engines, it was in production some thirty years and is found world wide, did I once read they use the same engine in London taxies and ice cream vans? They were still in production in 1992 and the records show that companies like Alfa, Hillman and VW used these engines as well.



We now have a spare engine which will be rebuilt using spares imported from England.



 We can offer it as a short motor or with the brand new  cylinder head in the picture, with serviced injectors and high pressure fuel pump, you can then remove the other parts from your own engine and fit them on to the rebuilt engine.



Click on the images for a larger view.


This is a Perkins 4108M, its running and has done around 1900 hrs since new, it uses no oil between services and has been found to be very reliable. Suitable for yachts around 35ft to 50ft and also for work boats and power craft, the rated HP being between 45 to 50hp depending on the boats hull form and engine speed used.

The two black pipes on the right of the engine and supported by the stainless steel springs, are the supply and return to the boats calorifier and hot water system, run the engine for twenty minutes and you can have a nice hot shower with clean fresh water!

Prices will depend on what you want, we can even offer the heat exchanger system and also a Borg Warner Velvet Drive gear box, plus your existing Perkins 4108M may be taken in part exchange?
The engine is in the Cape Town area which is South Africa, we can deliver country wide.

Work started on this project  is now in process, the new piston rings and assembly gaskets are ready for fitting.

Contact me for options and pricing.

Roy

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Saturday, 4 March 2017

How to bleed a Perkins 4108 marine diesel engine


The owners manual gives a good account of the process and really that should be all you require?

Bleeding is the term used to remove air from the high pressure side of a diesel engines high pressure injection pipes, as with air in the system the diesel will not flow and the engine will not run.


The picture shows the engine and in the lower left hand corner is the diesel oil filter, start by opening the top fitting and pumping diesel through with the diesel pumps finger lever, when no air is seen you can close the vent plug off.

There is a catch though, the pictures shown in the manual are without the exhaust manifold and a mass of related pipes and fittings.

This spare Perkins 4108 engine has the exhaust manifold removed and for that reason the bleed screws or bolts are more accessable and easier to see.


The picture below shows the actual vents you need to open.

Look for the three spanners, which are two 5/16" and one 1/2" in size. In practice you will only require one of each size.


Click on the images to enlarge them.

The system should be vented by opening the lower bleed plug first, pump with the finger lever untill there is no sign of air, leave the plug open then move onto the top plug, vent that too until there is no air, leave that one open also.

Then open the nut to the fitting on the right, there will be a pipe exiting there, when no air escapes open the nuts at the base of the four injectors.

Next move the engine throttle control to fully open, with the key crank the engine until diesel comes out of the four injector pipes and with no air.

Then close all the open unions up and the engine is ready for starting.

The manual does not show you what the vent plugs look like when removed, this picture is the upper plug.


This upper fitting is actually a spring loaded piston valve, cracking off the lower 1/2 " nut did not achieve a result. After removal of this spare set of bleed bolts,  I could better understand why?

In practice you will only need to slacken the smaller top bolt to bleed the air out, the bottom one is the one lying loose, it goes into the top of the main fitting and then compresses the spring we can see.


You Do Not Remove The Entire Assembly!  as that was done so that I could better explain what is inside the unit.

Note, you may have to use a 7/16" spanner to hold the center nut in place as you loosen the upper plug with a 5/16" spanner, ring spanners are better than the open spanners for this work.


This is the lower vent plug, check the flat side, that allows the air to vent out when the plug is opened.

All of the above pictures were taken with a Canon G12 digital camera set to Auto.

The Perkins 4104 marine engine shown is due for a full rebuild in 2016, new liners, pistons, crank bearings etc, it has a brand new cylinder head, contact me for pricing.

Roy

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