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Hydraulic fittings thread size


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Does anyone know the thread size and pitch for the P38 power steering pipes, P38 oil cooler and the V8 oil filter housing to 200 tdi radiator fittings?

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Measure them and look it up in a Zeus book or similar (some available online). Diameter and thread pitch is normally enough to work it out but double check because there are several threads that are very similar.

Mike

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When I was last up at Allisport. They were Tig welding AN fittings onto a V8 front cover and coolers for a customer. It was according to them cheaper and easier for fittings and some of the Landy pipework is No Longer Available.........If you find a work around let us know... 

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P38 steering box bolts are m16x1.5 and m14x1.5 

the oil cooler in a tdi radiator is threaded 3/8” BSP and there is then an adaptor that screws into that which the metal cooler pipe fits into.

no idea on the others - measure them and look them up in a Zeus book

 

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5 minutes ago, Jon White said:

P38 steering box bolts are m16x1.5 and m14x1.5 

the oil cooler in a tdi radiator is threaded 3/8” BSP and there is then an adaptor that screws into that which the metal cooler pipe fits into.

no idea on the others - measure them and look them up in a Zeus book

 

Cheers 

When you say measure them is that just a case of callipers to get a diameter or do I need to take other measurements?

 I was hoping to get AN fittings to screw straight on to the respective threads and banjo bolts for the steering.

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7 hours ago, keeley75 said:

When I was last up at Allisport. They were Tig welding AN fittings onto a V8 front cover and coolers for a customer. It was according to them cheaper and easier for fittings and some of the Landy pipework is No Longer Available.........If you find a work around let us know... 

I have a set of good front cover to radiator oil cooler pipes here but they are too long for the space I have available.

Off a V8 Disco 2

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54 minutes ago, Bigj66 said:

Cheers 

When you say measure them is that just a case of callipers to get a diameter or do I need to take other measurements?

Yes external diameter of the thread (male part) and the distance between tips of the tread (sometimes easier to measure across several threads then divide be number of threads) to give you the pitch.

Mike

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I bought a thread gauge set, invaluable on a late series, with a mix of metric, Imperial and all sorts.

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I thought I’d add some photos and measurements that I’ve taken in case it’s of use to others in the future.

P38 oil cooler connections:

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M16 banjo on to P38 power steering box and V8 power steering pump high pressure line:

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FF3D4797-9E4E-4E82-BB2F-16BB920998B8.jpeg.0beae65503475da781bc7cfb7d2d8f4f.jpeg

P38 power steering box M14 banjo bolt.

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200 TDi radiator oil cooler connections without adapters.

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I’m assuming this last one is the 3/8 BSP internal diameter measurement and not an external diameter metric thread? It’s confusing knowing what parts are metric threads like the steering box and which are BSP like the oil cooler.

Should the engine oil filter housing ports and the transmission oil cooler pipe connections to the ZF auto gearbox also be BSP?

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Ashcrofts tell me that for my box code (714) the thread size for the two oil cooler ports is M16 x 1.5

That said the oil cooler rigid pipe is a larger size fitting so presumably there should be an adapter between the two?

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The oil cooler ends at the oil filter head screw direct into the filter head ports, the only adaptors are at the radiator end to allow the forward ends of the pipes to connect to the oil cooler tube inside the rad right had side tank. 

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5 hours ago, Bigj66 said:

That said the oil cooler rigid pipe is a larger size fitting so presumably there should be an adapter between the two?

Is your cooler from an auto or a manual?

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8 hours ago, elbekko said:

Is your cooler from an auto or a manual?

It’s a P38 Diesel engine oil cooler that I am using for the autobox.

At the gearbox end I can hopefully use M16 AN fittings if they are suitable for hydraulic purposes. From the measurements I took above, it looks like the oil cooler threads are M22 x 1.5 unless anyone knows differently?

I still need to measure the female threads on the two ports of the oil filter head on the front cover.

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