7MGTE hoses
- Thread starter Mfendo
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I would get the "gates" hoses from Driftmotion. If you are on a budget. Otherwise I would get all new OEM Toyota hoses. OEM will run you several hundred dollars. I don't think the silicone hoses will go 10 plus years without fail. IMO
super51fan;1973972 said:
I generally get the oem stuff from my local dealership. It's just an overall clean look imo. Plus they give me very nice discounts because I bring my business to them along with other guys with old school yotas
Silicone lasts much, much longer than generic/OEM hoses. No cracking, higher heat tolerance, etc etc...makes removal and re-installation years from now an easy task.
The response to that will probably be 'why didn't Toyota go with silicone hoses', which is a stupid argument...so if you're thinking of posting this go research the chemical and physical properties of silicone vs EPDM.
The response to that will probably be 'why didn't Toyota go with silicone hoses', which is a stupid argument...so if you're thinking of posting this go research the chemical and physical properties of silicone vs EPDM.
I dont think silicone had even been considered for automotive hose use back when the supra was built, so...
Does anyone know if any oem manufactures build their cars using stock silicone hoses yet?
Does anyone know if any oem manufactures build their cars using stock silicone hoses yet?
To my knowledge no. I will look on SAE.org to see if they have any documentation on silicone being used for production automotive hoses.
Pseudo material experts aside the advice to use OEM is superior, as are the hoses compared to generic (commonly sold) "silicone" kits...
then what? Those are the two most common "rubber" type things I'm familiar with - what are the supra hoses made out of? I'll gladly look it up, if you give me a hint - I can't find it in the manual, or by google.
EDIT: the goodyear replacement hoses seem to be a "proprietary" epdm compound.
EDIT 2: further reading, and flogging my memory suggests that the originals are probably nitrile - which would be a load better (in my opinion) than silicone. Silicone has a lot of advantages, but oil and gas resistance is not one of them, and abrasion resistance is generally horrible for silicone.
I wonder if I can get our rubber extruders here at work to make me some red nitrile with fiber reinforcement...
EDIT: the goodyear replacement hoses seem to be a "proprietary" epdm compound.
EDIT 2: further reading, and flogging my memory suggests that the originals are probably nitrile - which would be a load better (in my opinion) than silicone. Silicone has a lot of advantages, but oil and gas resistance is not one of them, and abrasion resistance is generally horrible for silicone.
I wonder if I can get our rubber extruders here at work to make me some red nitrile with fiber reinforcement...
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supraguy@aol;1974009 said:
That wasn't my intention, I was guessing jetjock (as usual) would jump in and offer a snide remark but no factual information. It seems he felt compelled to regardless.
Silicone (not fluorosilicone) shouldn't be used where it comes into contact with oil or fuel, that's it. Temperature characteristics, aging, elasticity, all superior to OEM hoses. I don't need my mechanical engineering degree to weigh the differences, but I guess some of us like being argumentative for the sake of being argumentative.
I bet the JJ fellow is talking about real world results. On most MKIII's and really most old toyota vechicles have alot of hoses that are 25 30 years old. They fit properly and if you make sure the metal fittings are clean and use new Toyota spring clamps they are good for another 20 plus years. Oem Toyota only for me.
But you can do what ever you want. Some of the "smartest people in world" say this or that. I'll stick with the "dumb" Toyota engineers. Just saw a thread about a engine that was destoyed by a "upgraded" oil line failure. Because the supposed crappy OEM part sucks. Yea.
Have a nice day
But you can do what ever you want. Some of the "smartest people in world" say this or that. I'll stick with the "dumb" Toyota engineers. Just saw a thread about a engine that was destoyed by a "upgraded" oil line failure. Because the supposed crappy OEM part sucks. Yea.
Have a nice day
The generic hoses on Ebay, appear to be constructed of two different compounds. The interier material seems somewhat harder than the external silicone. Not sure what its made of.
I have one of the eBay silicone hose kits.
3 layers, just like the silicone couplers that I have for my IC piping, and the upper radiator hardpipe. Inner layer of silicone, middle layer of braided nylon fibers, and an outer layer of silicone. Specific density of the silicone matches that of Vibrant branded parts, making me think that it's a very similar compound. Should be proof against casual oil contact oil or coolant. The only line that I know of in that kit which is in contact with oil is the breather line between the head and block, which shouldn't be flowing oil, but may come in contact with it. I don't think that the stock line would survive flowing oil for long either given how brittle it has become over time. I believe that I can expect reasonable service life for the coolant lines included in the kits.
I'd be fine with stock, but stock is more expensive. I believe that expense is the reason why the stock lines aren't silicone. It is more expensive to produce, therefore is a poorer choice for OEM.
3 layers, just like the silicone couplers that I have for my IC piping, and the upper radiator hardpipe. Inner layer of silicone, middle layer of braided nylon fibers, and an outer layer of silicone. Specific density of the silicone matches that of Vibrant branded parts, making me think that it's a very similar compound. Should be proof against casual oil contact oil or coolant. The only line that I know of in that kit which is in contact with oil is the breather line between the head and block, which shouldn't be flowing oil, but may come in contact with it. I don't think that the stock line would survive flowing oil for long either given how brittle it has become over time. I believe that I can expect reasonable service life for the coolant lines included in the kits.
I'd be fine with stock, but stock is more expensive. I believe that expense is the reason why the stock lines aren't silicone. It is more expensive to produce, therefore is a poorer choice for OEM.
I used hose techniques for the vacuum hoses that have a "kit" for the 7m or well they use to
http://hosetechniques.com/
http://hosetechniques.com/
I'd agree with Dan, more expensive to go with silicone hoses for OEM applications.
As far as the OPs question: http://www.verociousmotorsports.com...e-Bends/Venair-90-Degree-Silicone-Bend-4-Arms
That hose should be used in three places: the 90 degree hose that always fails behind the water pump, the 90 degree on the back of the head, and the 90 degree on the exhaust side that has a plug in it.
You can use generic single ply silicone for the throttle body/ISCV coolant lines. The remaining coolant lines (both the radiator pipes as well as the three long heater hoses near the firewall) you can buy in kits from mishimoto or whomever, and are molded correctly as far as turns and length goes.
Oh sorry, I forgot science doesn't apply in the real world.
OEM hoses are great and I'm not bashing them, +1 for the stock spring type clamps as well. But if I want something that I can take off and reuse five years from now? Silicone no doubt. What will withstand engine operating temperatures with ease, because it is rated for 150 degrees over what the engine runs at? Silicone. Higher pressure rating? Silicone. Doesn't age, crack or become brittle? Silicone. You can't really go wrong with the stuff.
As far as the OPs question: http://www.verociousmotorsports.com...e-Bends/Venair-90-Degree-Silicone-Bend-4-Arms
That hose should be used in three places: the 90 degree hose that always fails behind the water pump, the 90 degree on the back of the head, and the 90 degree on the exhaust side that has a plug in it.
You can use generic single ply silicone for the throttle body/ISCV coolant lines. The remaining coolant lines (both the radiator pipes as well as the three long heater hoses near the firewall) you can buy in kits from mishimoto or whomever, and are molded correctly as far as turns and length goes.
super51fan;1974149 said:
Oh sorry, I forgot science doesn't apply in the real world.
OEM hoses are great and I'm not bashing them, +1 for the stock spring type clamps as well. But if I want something that I can take off and reuse five years from now? Silicone no doubt. What will withstand engine operating temperatures with ease, because it is rated for 150 degrees over what the engine runs at? Silicone. Higher pressure rating? Silicone. Doesn't age, crack or become brittle? Silicone. You can't really go wrong with the stuff.
I have four years and about 50k miles on the hose behind the water pump, and despite numerous overheats (as well as a leaking exhaust manifold gasket) it looks and feels brand new. I've taken it off more than once and just had it off when I took it off my old engine and put it on the one I just put in the car.
Once again, I'm not blowing smoke just for giggles...silicone doesn't age. It's just as pliant as it was when I bought it. Unless I stab it, it's not going anywhere.
Once again, I'm not blowing smoke just for giggles...silicone doesn't age. It's just as pliant as it was when I bought it. Unless I stab it, it's not going anywhere.