opinion needed for use of reinforced hose to replace lower PCV coupling

[JimBee]

I'm doing the PCV repair on my 850. I have most supplies that hopefully will be adequate, but I'm concerned about using an aftermarket coupling for the lower oil trap nipple-to engine block, it looks really flimsy. This is 3/4 inch diameter nipple. There's fuel hose available that could be used for that one. Any opinions on how a section with clamps might stand up in that application?

This is what I'm looking at: https://www.amazon.com/uxcell-inch-Blac ... =UTF8&th=1

Other options on this page. https://www.amazon.com/s?k=3%2F4+inch+I ... _sb_noss_2

I've never used silicone hose for anything but apparently some MVS members do. Would that be any better for heat/oil resistance?
Ex: https://www.amazon.com/Zevaroy-Coupler- ... =8-12&th=1

Volvo coupling for that nipple priced over $20.00, and how much better would it be?

[erikv11]

I think you mean 8653339, for $15 at FCP?

https://www.fcpeuro.com/products/volvo- ... -8653339-1

The fuel line should work if you have room to get the clamps in you want, all you need there is something that will drain the oil back to the engine block. But it seems you'll spend the same on the fuel line as for the Volvo part. And you know the Volvo part will certainly work.

I would not recommend silicone there. It will handle the heat well but in high-oil usage they get slimy and absorb oil.

[JimBee]

That's the one. This is what I'm concerned about: download/file.php?id=19958&mode=view

[JimBee]

That's the one. This is what I'm concerned about. Scroll down, shows clear pic of deteriorated lower hose/coupling and the replacement the section of hose he used to replace it. The hack seems like it will be more durable.
viewtopic.php?f=1&t=60133

I suppose the OEM coupling was made that way with a metal band in place of clamps because the clamps they use are crimp type, so for that tight space screw clamps work better. Plus, IF the hose used stands up to the oil and heat, seems like it would be a lifetime repair.

[erikv11]

That's a great post from the archives, good find. The OP in that post was pretty thorough, that's good evidence to add support to your thinking it may be a more durable repair.

Is it 5/8 or 3/4, did you measure? That other thread says 5/8.

It does seem like the fuel line will have good durability to the high temps of attaching to the engine block, like you're saying. And it will definitely have the oil resistance. Fuel line is preferred over heater hose any time you DIY a PCV application. I do recall the spacing is tight for clamps down there, so getting the right two clamps in there may be the only tricky part.

[abscate]

For $15 use the Volvo. I’ve got two in stock , if you want to save shipping I can send you one.

[JimBee]

Thanks. I've ordered the NBR hose for that one, just seems like it will be more durable.
However, do you have an extra one of these? https://www.partsgeek.com/t7k1txc-volvo ... -hose.html