is it possible to get air into the coolant by the waterpump?

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is it possible to get air into the coolant by the waterpump?

Postby ben64 » Wed Jun 07, 2017 6:46 pm

Hi,

I'm suspecting a head gasket but as long as I drive the temp is ok but after around 20min if I IDLE in trafic jam for example the coolant get close to the red so my mecanic is wondering if a leak in the coolant pump may let enter exhaust gaz or exterior air ( I have low CO² ) in the collant ?

Have you ever heard about this ?

Thanks by advance
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Re: is it possible to get air into the coolant by the waterp

Postby BillyCorgi » Wed Jun 07, 2017 7:19 pm

Given the location of the pump (at the bottom) and the pressure in the cooling system, I would expect a leak of fluid out of the pump rather than a leak of air into the cooling system at the pump?
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Re: is it possible to get air into the coolant by the waterp

Postby Surge » Wed Jun 07, 2017 8:00 pm

ben64 wrote: my mecanic is wondering if a leak in the coolant pump may let enter exhaust gaz or exterior air ( I have low CO² ) in the collant ?

Have you ever heard about this ?



I have heard about it, and every time my reaction is...


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Take it to a new mechanic, a Subaru specialist.
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Re: is it possible to get air into the coolant by the waterp

Postby ben64 » Thu Jun 08, 2017 1:24 am

ok lol

At least I have no oil in the coolant is better than nothing

But as I have no idea if the water pump was ever change once since 275 000 km I prefered to ask.

Well there is no many subaru dealers in my country and often they are Lotus or Porche too and except generaly those horrible diesel :evil: they don't often work on H6 like me ... even if an EZ30 boxer should be very close to a Porche Boxer I guess
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Re: is it possible to get air into the coolant by the waterp

Postby 2.0R » Fri Jun 09, 2017 12:50 am

Sounds like headgasket to me.
And no, air does not enter via a leak, the system is under pressure.
Air can enter, via the cap, after a leak, once the system has cooled.
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Re: is it possible to get air into the coolant by the waterp

Postby Lane » Fri Jun 09, 2017 10:35 am

Re-evaluate your "mechanics" credentials and effectiveness.
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Re: is it possible to get air into the coolant by the waterp

Postby Tewaka » Sat Jun 10, 2017 1:07 pm

My H6 Lib is at the Mechanics right now, I had 2 holes, 1 in each Gasket....grrrr...lol good news is atleast its being sorted...

If yours is a HG, word of advice, buy all your parts online, I saved a ton of money by buying my HG set and water pump etc online, all Genuine Subaru except the HG which was Aftermarket from Maier( Formerly Viktor Reinz), I made sure to get them to replace everything I could while the engine is out, saves money in the long run, even things like HG Bolts, saved heaps getting them online...
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Re: is it possible to get air into the coolant by the waterp

Postby Dnalihp » Fri Jun 16, 2017 1:32 pm

Tewaka wrote:My H6 Lib is at the Mechanics right now, I had 2 holes, 1 in each Gasket....grrrr...lol good news is atleast its being sorted...

If yours is a HG, word of advice, buy all your parts online, I saved a ton of money by buying my HG set and water pump etc online, all Genuine Subaru except the HG which was Aftermarket from Maier( Formerly Viktor Reinz), I made sure to get them to replace everything I could while the engine is out, saves money in the long run, even things like HG Bolts, saved heaps getting them online...


I think I'm about to do the same and will definitely check out Maier as I trusted Viktor Reinz stuff. I have a similar issue, started with a leak in the radiator and a changed radiator later I recognized that the system wasn't bleeding properly. Then to see coolant dripping from the bottom, I've decided to do a HG+timing belt replacement. I just hit 100k a few weeks ago so...

(Btw this is my first post here, been stalking for years. I have an 03 Spec B. <3)
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