Thread: Wading Plugs

1/4 bsp.

If it is a 300Tdi, there is another 1/4 bsp wading plug in the timing belt cover.

Thanks John, yes it is a 300tdi. There is actually two plugs one in timing cover and one in bell housing so I assume they will be the same size.

Thanks again.

Originally Posted by Bush65

1/4 bsp.

If it is a 300Tdi, there is another 1/4 bsp wading plug in the timing belt cover.

Is it 1/4" BSP or 1/4" BSPT?

The thread in the housing is parallel. Either BSPP or BSPT male fittings can be use with female BSPP ports.

Most plugs are BSPT so they can seal on the threads. Male fittings with BSPP threads are intended to seal on the washer face.

The 300Tdi has faces on both the flywheel housing and timing belt housing to suit sealing washers.

For the wading plugs, I wouldn't be concerned about sealing the threads.

I Thought it was great,
that last week I learnt about BSP thread, with air lines.

NOW,
you talk about BSPP, BSPT.


Know wonder I don't try to keep up.

British Standard Pipe can be parallel or tapered
BSPP = British Standard Pipe - Parallel
BSPT = British Standard Pipe - Taper

BSPP and BSPT are Standard thread systems. Some people tack M or F on the end of the BSP designation to denote male and female, but I personally don't like that.

With the USA national pipe thread standards, NPT denotes National Pipe Taper, and NPTF is a Standard for Dryseal threads. Dryseal threads are male threads designed to have an interference fit on the crests so they provide a more reliable seal at pressures commonly used with hydraulic systems.

With hydraulic systems, BSPT will often leak, which is why it is more usual to use BSPP with seal washers. NPTF is the only taper thread I would happily use in a hydraulic system, but then only if there was no other choice (taper threads can crack/distort valve housings if they are overtightened in an attempt to stop leakage).

ok so i just bought a wading plug 12bucks later, now my question is should it only be in why going through water or is it something that you put in when you air down take out when you air up