Willys Hotchkiss Jeeps
Willys Hotchkiss JeepsWillys Hotchkiss Jeeps

Yearly service for the motor pool...

It's that time of year.. time to service all the vehicles after many months of storage and (sometimes!) neglect.

So it's oil changes for the jeeps, armoured car, and motor bikes.

I do this every year regardless of the miles I have travelled - it is good practice and will make your jeep engine last for years.

I will produce a step by step guide to changing the oil on a jeep over the coming days and place on this blog - so even novices can 'have a go'..

It all starts with a delivery box from Jeep parts.. no not cheese, but the service items for the jeeps.

Each jeep will need a good quality filter (the tin case type) and the correct oil.

If you follow the manuals then you will be using SAE 30 MINERAL oil.  You can use other grade mineral oils if you wish, but don't use any semi synthetic or fully synthetic oils, as they can be too thin.

The first step is to warm your engine up.  Driving is always the best option, as idling again isn't too good for the jeep.

Once the temp gauge has reached normal, its time to park up and drop the oil out the sump.

Make sure the engine is off and ignition as well (don't want any sparks!) and gently undo the bottom sump plug.  Its usually about a 22/23 mm (but they can vary) and drop the oil out into a container.

I usually keep last years oil container and cut the side off to act as a receptacle. No more than 4.5 litres will come out so you are safe in the knowledge it won't over spill!.

Because the oil is hot I usually wear some protective gloves..

Wait until all the oil is out.  I then usually pour through about half a litre of the new oil to flush the system of any dregs.

Once all the oil is out I have been known to put my finger through the sump plug hole and feel for any sediment, swarf or even engine parts!  Yes I once found a collet using this method!

This gives you an indication of the state of the engine.  If you find a lot of sludge, swarf (metal parts) or anything else - I would advise an immediate dropping of the sump to investigate.  New sump gaskets are only a few pounds, so I worth the effort..

I then inspect the oil for any evidence of water.  I also smell the oil to see if it smells strongly of fuel.  This is helping me understand if I have a water ingress problem, or a spilt diaphragm in the fuel pump..

If its generally dark, not too whiffy and hasn't any large bits in it - I would put back in the new oil container when that's empty - to do into recycling (most councils take this).

More to follow next week including the top tip on emptying the oil filter housing!....

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