Coolant leak question TC33D

[sherpa]

I have a coolant leak on my TC33D. I attached a picture so you can identify where the leak is. It is on the right side of the engine just to the right of my oil filter. I need to know if this plug has threads or is pressed into the engine block? It is in line with the freeze plugs. Can this plug be tighten or should I just use some stop leak?
Thanks,
sherpa

 

[MikePA]

Based on its shape, hex, I'd guess it has threads. The picture at Messicks shows threads on it. $32.60.

 

[ruffdog]

It is a common problem. The hose connector is made from zinc and will react with iron. I replaced mine when the tractor was nearly new with brass and it has yet to leak after these years. Pictures will follow very soon.

 

[ruffdog]

Here is what it looks like and the tool to get it out with. I milled a slot into a heavy impact socket to get it out in one piece. You can just cut the bib part off and use a 1-1/16 deep 6 point socket too.

 

[MikePA]

Where can you get the all brass version and what's it called?

 

[ruffdog]

I custom made mine from pipe fitting supplies. These are examples and I believe it is a 3/4 TP thread. Just get the correct hose bib. Use your own judgement on supplies as these are just samples.

Brass & Chrome Pipe Fittings | MSCDirect.com
Brass & Chrome Pipe Fittings | MSCDirect.com
Barbed Hose Fittings | MSCDirect.com

 

[RickB]

IIRC, the block drain on that tractor is 3/4"BSPT, not 3/4"NPT.

 

[ruffdog]

With the 3/4 thread...they are VERY similar. Unlike the other sizes.

NPT vs. BSP Pipe | Pipe and Hose

 

[RickB]

With the 3/4 thread...they are VERY similar. Unlike the other sizes.

NPT vs. BSP Pipe | Pipe and Hose

Maximum one pitch per inch difference for all sizes under 2-1/2". Still different and not a good idea to mix thread pitches.

 

[sherpa]

Thanks so much for this info!
I will order my parts and get them here before I cut the barb off.
sherpa