What dose it mean when my water hose looks like this... It only happens after I drive it for a while.

 

It looks like your hose has developed a weak spot and expands under pressure.
A hernia if you will, that hose should be replaced before it ruptures.

 

expanded? it looks more like its sucked in. Plus after it cools down I take the radiator cap off and the hose turns back to normal
-thanks

 

Sorry, forum has been wonky all morning and I couldn't expand your thumbnails.

 

how old is the hose? I would probably replace it. It should be rigid enough not to do that.

 

I'd be replacing That hose.ALSO I would be replacing the Thermostat And the Cap...the Cooling system relies on the Cap to Give,and the Coolant to escape to the Overflow,when it Expands..it looks like Something is happening there,That I honestly Have SEEN before But can't explain..But,a thorough going over of the cooling system should be Done.NOW.

 

Are u having overheating issues? what does your temp guage read?
I would do a coolant flush and see if helps clear some blockage. Try replacing the caps if that doesn't help the situation I'm guessing water pump failure.

 

The hose is collapsing under vacuum which is odd because that's on the discharge side of the water pump. Your cooling system should be under 13psi of pressure.

I'd replace the pressure cap(s) and the hose just for kicks. If it's only that water hose and not the others then I'm more inclined to say it's a weak hose. Then go from there.

If this happens after you drive for a while then let your car cool down, then the vacuum makes more sense. Then I'd say it's either a weak hose or a blockage preventing the cooling system from vacuuming coolant from your coolant reservoir. Remove the line going to your coolant reservoir, blow and/or rinse it out, then put it back. If you find sediment in the line when you blow it out, tisk tisk. Next time use distilled water instead of tap water in your cooling system. If so, I'd change your coolant to be safe (and every 18 months after that), to get out a lot of the sediment. Use 50:50 green ethylene glycol antifreeze:water, of course. Replace your thermostat whenever you change your coolant b/c that's the easiest time to do it. Be sure to use an OEM thermostat (Mazda dealer or www.rx7.com or www.mazdatrix.com or www.racingbeat.com).

 

No overheating. quite normal. and the RAD. cap is brand new. bought it myself.

 

ive had problems like that and the hose was the wrong length. (do you have a stock radiator?)

 

Actually no, I don't have a stock radiator.
this is what i got...

 

yea i had to trim my hose (ive since gotten a samco set no probs) when i got my alum rad.