1977 BJ40 Oil Leak

[CessnaSkylark]

All- looking for a little help. First I’d like to say that I’m no diesel mechanic (or mechanic in general). I have a 1977 BJ 40 from Costa Rica, but the engine could possible be newer or older than year model. I’ve developed a pretty good oil leak; so I took the cruiser to my local mechanic (he’s Venezuelan and speaks limited English). I was told that the o rings need replaced on the oil pump; but it looks more like a vacuum pump than an oil pump. I did not take it off; but it seemed like oil was dripping somewhere between the alternator and block. Just need to confirm what actually the photos show and where I can find replacement or suitable substitute O Rings. Any help would be greatly appreciated.

 

[sodafeld1]

I find if you clean it first, then run it, you can observe exactly where the leak is.. Not sure of your model but there are often oil pumps which run from the alternator which creates a vacuum for a brake booster.

 

[duncanrm]

@sodafeld1 is correct.. its a vacuum pump on the back of the alternator.

I have not seen them repaired, in our wasteful society pretty much everyone just replaces the entire alternator. Replace the oil feed and return line hoses at the same time if you go that route as its possible they may have been the source of the original leak - when replacing the hoses the banjo fittings should be reinstalled with new crush washers either side of them (3 banjos, 6 crush washers)

 

[sodafeld1]

Often the hose and or the connections eventually fail. The pumps usually outlast the alternators.

Beauty about the era of these cruisers are that nearly everything is repairable. Minimal plastic and electronics.

I agree that society is steered to consume and be wasteful. We are lead to (lied to) that a big GDP is good, it includes rubbish. Save the planet they say.
I replaced the brushes on the washing machine recently, many are being thrown away for the same $7 repair.

 

[sodafeld1]

Feelin your love brother. I prefer copper crush washers to aluminium. You can re anneal the copper washers to a red glow which makes them soft again and re use them, quite a few times if you are not heavy handed, just tight.

 

[CessnaSkylark]

Awesome! Thanks for the help; I ordered new hoses and alternator as a spare. I had to order the parts from Australia, so hopefully they make it this time. Last alternator I bought never made it, was forever lost in the LA Customs Office. I just had this alternator overhauled 10 months ago, so I’m going to clean everything up and replace o rings and crush washers and see if I can get the leak to stop. The BJ40 wisdom is greatly appreciated…….thank you.

 

[duncanrm]

The BJ40 wisdom is greatly appreciated…….thank you.

I have some B Engine docs archived here if you want them (scroll down to "B Engine Specific Reference Information"): Toyota Diesel Documentation - https://sites.google.com/view/toyotadiesel/home