Bypass Hose

[Adjuster]

I've found this stuff works great, and looks good too.
http://www.firesleeve.com/

The 90 corner hose is available at most parts places, Just buy one that can be cut down to fit, and use quality worm clamps to secure it.

Cut your firesleeve slightly longer than your hose, slip it over the hose, put the clamps in place loose, then install the hose. Pull back on the sleeve so you can secure both clamps, then let the sleeve expand loose over the clamps...

If you want, you could add another barrier between the manifold and the hose, but this stuff will pretty much do it.

I have also used wrap, and it works great. So do thermal barrier coatings on your exhaust manifold and heat shields. They not only lower underhood temps, but they reduce radiant heat.

If you have no heat shield, your just baking your hoses and they fail in short order.

 

[wardog]

This hose seem to be a problem to everybody mine blew up last week. I had to change it outside Autozone. I wonder if there is a hose that will replace this one like the aftermarket BLue hoses for the radiator. By the way OBX makes top and lower reenforced radiator hoses 50dls not bad at all.

 

[Adjuster]

If you want a somewhat cost effective replacement, ask for Goodyear blue silicone hose.

It has a reinforcment braid, and is made for domestic cars, so the price is not too bad. Just about 30.00 IIRC.
Here is Goodyear's write up on it.
http://www.goodyearep.com/productsDetail.aspx?id=6104

You can get this in 90 bends from places like NAPA etc.

I used "generic" ones from Napa. No problems. Stock heat shield that is thermal barrier coated

Also my exhaust manifolds are thermal coated, as are the manifold heat shields...

And my new manifold (China e-bay) is thermal coated, and wrapped. So heat control underhood is important for power, and for the life of your hoses. (All my other lines have this fire sleeve on them to protect them from radiant heat as much as possible, and also protect them from abrasion.)

If I did this again, I'd get nylon covered oil lines v/s the stainless steel, or just have Parker fabricate them from rubber covered stainless, with the fire sleeve over that.. Best of both worlds, strong, and low key looking.

 

[jetjock]

Huh. In over 20 years I've never had a problem with that hose. 40K miles on it since engine overhaul and it's fine. Every stock hose on the car went to 105K miles. In fact my lower radiator hose is still original. I really should get around to changing it.

I do like silicone and the Goodyear stuff is top of the line. That said many (if not most) coolant hose failures are caused not by thermal fatigue but by ECD. It's another reason to check your coolant potential every so often. ECD is best dealt with using EPDM formulated hoses. Gates Green Stripe for example. Very good stuff.

I have to disagree on worm clamps unless the constant tension type is used.

Firesleeve is also common in aviation and can be bought from any aircraft supply, as can bulk mil spec high temp teflon lined hose. Diameters up to -8 (iirc) can be bought with integral fire sleeving molded right onto it. Looks nicer and no clamps to mess with. Nothing beats real aerospace stuff. It's spendy though.

 

[billwert]

Well I appreciate everyones Input on this. Hopefully Heat wrap will take care of my problem. Thanks Bill.

 

[Poodles]

JJ: I like the stock style clamps, but I'm not the first owner of my car...

my radiator hoses have new stock clamps on them, and I like them far better than worm gear...

 

[3p141592654]

I've been switching the Supra hoses over to stock Volvo hose clamps.