yzf-r1

iTrader: (1)

I've heard that the coolant hoses, esp those that supply the turbo manifold, are prone to bursting without warning, which could be just as catastophic as the AST....so I'd like to replace them....anyone done this recently? how much of a pain in the *** is it? how many hoses are there? part numbers, diagram anyone? I know I'm asking alot here...thanks in advance

CantGoStraight

I just got through doing these when I did my radiator and water pump. They are burried behind everything and would have been extreemly hard to get to if I hadn't been doing the waterpump (I removed the water pump housing as well and this made them accessable. I got the parts from Mazdatrix for about 15.00 onnce you locate the parts it'll give you the part number.

juliof

These hoses are a weak point they swell and can easily burst , I replaced mine last year only had 40K on them they where both swollen from the heat off the turbo.Both hoses were about $15 I wraped both hoses with thermotec heat sleeve.

efiniracing

I just did mine too, and they are a pain in the ars! but definately a must. Try to soak em in some coolant for a minute to lubricate them. I got mine 1/2 way in then it just stuck there.

yzf-r1

iTrader: (1)

ok, thanks....is there any advantage to running silicone/braided hose....would they hold up better under the heat? are all the hoses the same diameter?

RotaryKnight

I use Thermal Flex reinforced silicon hoses for my radiator lines. I had them make me some formed bends to use since i have my radiator mounted vertically. The Thermal Flex do not swell at all and are thousand times better than stock.

yzf-r1

iTrader: (1)

ok, thanks....checked out the thermalflex http://www.thermalflex.com/automotive.html and it does look like good stuff....the only question is, what diameter do I need, and do I need pre-formed bends to make it fit?

thanks again

OC94Rx7

yzf-r1,
If you decide to go with stock turbo hoses? I changed mine a few months ago, the stock hoses lasted over 7 years and only cost $15.00 at Mazdatrix like (cantgostraight)said. Part# 13-5360-N3A1 & 13-54X0-N3A1. You will have to remove the water pump housing. I was able to replace the hoses without removing the y-pipes, some people used to remove them first. You may want to replace the thermostat while you have the water pump off. Part# 15-1710-8AF6. I used the screw type clamps, but I think Max cooper said his loosened after time and used new stock clamps. Take you time, it's not so bad!
Oliver

CantGoStraight

Both the turbo hoses actualy hook up to the water pump housing itself. Once you get the air pump off and the intake air box you can get to the hose ends that hook to the water pump housing, there accessable but will take some work to do without removing the housing. You'll have a little more room if you take off the Intercooled hoses as well. Lubricating the hoses will help allot as mine seemed to want to go on half way then had to perswade (spelling) it fingers are still sore from all that pushing and pulling. Good luck, Jack

yzf-r1

iTrader: (1)

ok, thanks for the part #s/advice...I'll try leaving the water pump housing on first

CantGoStraight

Just a note...there are some oil lines the run under the water pump housing there are two support brackets. One you have to take the bolt out of the bracket, the other you can slip the hoses over and down. The only way you can get the housing out without taking the oil lines out it to remove the studs, easier to do with the water pump removed. If you can do it without taking the water pump and housing off you will be better off as you will have to replace the water pump housing gasket as well. It's slow the first time, much easier the second.