Hello!

I hope you guys have had a great holiday weekend. I recently imported this vehicle and now I'm doing a bunch of maintenance as it seems like the previous owner had it sitting for some time.

I'm wondering what the hose size is in the circle to replace the blocked path with the clamp as it's currently leaking. I've looked in the forum and couldn't find it the size. I also lost the post where a guy was talking about these nubs he bought and haven't had a problems since as a solution for potential line breakage such as in the picture. If anyone has the name for the product I'd appreciate it if not the tube size will work just fine.

Thanks!

 

Not quite sure what's being proposed, unless a block off for a oil cool single? Anyhow, looks to be a turbo coolant line - judging by the original sheathed metering pump lines in the vicinity - that should be 10mm. A tip, make sure you use very good quality hose there if going 3/8" rather than OEM, and watch out for kinks!

 

Apologies for the confusion, it seems I was looking for the info on the forum using the wrong terms. Turns out it’s a coolant line for the turbo that was deleted now that I’m single turbo’d. What I was looking for was “blanking” caps

Would 10mm be recommended in this case? That was the biggest up in the air from what I’ve found so far. Between 6.5 mm, 8mm and 10mm

 

I personally don't like caps, prefer either drilling and tapping for a plug or a short length of hose with a turned plug to suit the ID of the hose, for anything that will potentially kill your engine if it fails. If you wanted to go that way though, chair tips should be available in 10mm at a local hardware.

 

hmm what’s the turned plug idea you mentioned? I want to go the safest route, rather than the potential mishaps of using a hps silicone cap.

thanks!

 

you can find a bolt, or other piece of metal the correct size you can cut it down an use it to plug a new piece of hose

 

much appreciated! Have a great day

 

I don't mind the caps so much, since they basically have the same hose material type and hose clamps as a short length of hose. Plus they have 2 less components - the plug and the second clamp to hold it in the hose.

 

seems like it’s more so personal preference as long as quality materials are used. Is that about right?

 

lots of caps have a seam, and the seam likes to split. also most caps aren't really meant for coolant, they are meant for vacuum

 

Agree it depends on how well made they are and the type of material. Silicone or rubber are fine for coolant.

 

You have a few options -

- Use the stock coolant hose, stick a proper metric size bolt in it, and clamp it in place. It's not pretty but it will work.
- Pull the water pump housing, remove the nipple (it's pressed/glued in, steel nipple in aluminum housing), then drill out and tap for a pipe NPT plug. Teflon tape and install.

Any rubber caps WILL fail on you. Most of them are designed for vacuum. That will see a lot of heat and pressure, even more so that it's close to the turbo.

Personally I'd take the time and pull the water pump housing to drill/tap/plug. If you can't do that now for whatever reason use the bolt shoved in the hose trick.

The Mazda OEM coolant hose can take the heat and pressure well. Lots of aftermarket hose can't.

Dale