Thread: Coolant Hose (bypass pump-thermo)

Originally Posted by rar110

If its the short hose with a 90 degree bend I am thinking of, it is a very good spare to carry. I had one bust and had a difficult time finding one.

That's how I found the mini one. I called into every garage on the way home from an aborted ski trip.



My one is ~22mm inside. I know because I used a spring seat from a suspension fork in my toolbox to plug the other end and get 300km home.
It was snowing heavily for 100km of that.

Originally Posted by D3Jon

I recently (5 months ago) bought one as a spare before a big trip and found out that there are many different bypass hoses for the 4BD1! The parts guy brought one out and it was tiny - the one on mine is quite large about 25mm ID.

It all depends what the 3 identifying suffix letters after 4BD1 are for your engine. If it's a factory built 110 4BD1 then it'll be a 4BD1 RBG and you need to specify this to the parts dept. The industrial engine parts book my local Isuzu dealer has colums across the top with all different combinations of engine suffixes - it's amazing how many vaients of the 4BD1 were produced, some found there way into Land Rovers, some into Hitachi forklifts, obviously the Isuzu trucks and also the marine derivatives, etc. All sorts of things are affected like thermostat housing, bypass hose, fuel filters, oil filter housing, and I would have though other things like cam, and maybe injection pump?

These last 3 letters aren't stamped anywhere on the engine itself, but can be determined from the engine number by Isuzu, or just knowing that the 'RBG' is what was supplied to LR.

Anyway, if your's is a genuine factory Isuzu County the part number should be the same as mine: 8941462970, cost me $13.27 + GST and a bit of air freight to get it over to WA.

Hope this helps,

Jon

My thanks to all who responded incl isuzubob, D3Jon, Dougal - I now can confirm the above p/n 8941462970 and the current over-the-counter cost here is $12.56 + F&H

I have posted this part no (& the GM equivalent) in the parts refs sticky & I am going to carry a spare with my spare water pump and main hoses.