Dltreezan

iTrader: (3)

Ok guys,

I have an s5 vert and last year the rad went out. I used my s4 radiator and just having to ghetto fill it because there was no longer a fill cap. I had been filling through the sensor hole and by holding the hose open by the thermostat neck and then closing it when the water would pour out.

Every month or so I would have to put water back in it because it the buzzer would go off and I knew I wasnt really topping it off, but somehow I was still losing water.

Anyhow when I did all of that I removed the thermostat and have been running without it since.

Anyhow this week my car froze I guess with what it had in there and for some reason actually ran hot. I put more water in it after it cooled off but then it was flooded like hell. I got it running then there was no more problem, until I noticed water leaking from under the car.

I found it was coming from that hole in the water pump, so I decided to replace the water pump from my other defunct s5 as well as the radiator. I got everything together and this morning started it up and it wouldnt crank. It took me an hour of doing the deflood procedure to get it to start and when it would it would die and still heat up. I had to restart the car five times on the way back from the gas station and I couldnt give it too much gas because it seemed to lack power. Not like a blown rotor.

Anyhow I changed the spark plugs thinking maybe I fouled them and changed the oil as well. I also put the old radiator back in it. Now the car has some ethylene glycol in it when it used to be all water.

SO the car runs but between putting the radiator in and when it drove it with the new plugs it was hell getting it to start back up. Usually when it is flooded it will start and then be fine, but it seemed to buck and and die, wouldnt hold an idle, but had no problem starting initially like in a flood.

After a few minutes it would hold an idle fine and then ran great, but this is not the first time this has happened this month after a flood. The car also runs warmer than normal, right under the half way mark wen it used to barely hit a quarter. any ideas or reasons for all of this?

ericgrau

iTrader: (1)

Get a real filler neck. I hear the s4 one is good, dunno if it fits. Get the Lisle funnel (search forums, then search google). Flush the system out a couple times with distilled water and a bottle of radiator flush one of the times. Refill with antifreeze and distilled water, about 50:50. 100% water will cause rust, tap water will add sediment. Get an OEM thermostat from a Mazda dealer or www.rx7.com or etc. (not from an auto store). Check the engine compression.

Okay, that's just everything you should do anyway. I dunno if that will solve your problem, but maybe it will. The ECU often knows when you don't have a thermostat and that might cause problems in an S5, I dunno. Air bubbles and running w/o a thermostat may also cause cooling issues. In the future continue to change the coolant and thermostat once every 12-18 months (no need to flush). Also inspect the hoses regularly, etc.

The bad waterpump was just a bad waterpump. You replaced it, good, all done.

Dltreezan

iTrader: (3)

no wonder I had so much damned rust when I emptied the thing. The filler on the s4 is on the thermostat housing, the one on the s5 is attached to the rad, so I will have to ghetto one up and splice it into the hose at its highest point.

I still wonder why it would flood out everytime I work on something coolant related.

Dltreezan

iTrader: (3)

ok guys I got back in the car this morning and it was flooded again. But this flooding is much different than I had in my s4 or when I had the car flooded before. I dont get any white smoke or anything.

When I say flooded I mean I have to push the pedal all the way to the floor to get a crank out of it. But when my car was flooded before it cranks and then runs fine.

When I do it now the car cranks and the idle jumps very erratically and if I give it any gas it totally dies out, I have to modulate it and then once it runs it does.

Today I started it after work and the same thing. Except I didnt have to hold the gas pedal to the floor like I was unflooding it. I would crank it. It would die, crank, then die. Then it would run fine, no probs. I never had any probs with it until I had this heating issue.

Would not connecting any of those little sensors behind the water pump properly or even that little hose have anything to do with it?

That little hose I didnt use the clamp to put it back.

Dltreezan

iTrader: (3)

bump.