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Registered:
October 2005
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Water/Rust type stains around Spark plug wells!
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Sun, 02 October 2005 05:51
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Hey, i have a 91 corona, and have been losing coolant lately. Not alot, and i haven't identified a source as such, but i have to fill my reserve tank once every 3 weeks or so.
Anyway, i noticed a rusty powder that seemed to be coming from my spark plug wells a few weeks ago. I thoroughly cleaned that area out, and thought that would be the end of it.
but today i look and there it is again. Except this time it looks more like battery acid. It's a bluey powder.
I don't think this is a good sign at all, i'm thinking head gasket or something not good. However, there doesn't seem to be any oil contamination at all, nor is their coolant contamination.
The only thing that's possible, is that i've changed my spark plug type..from NGK to Denso. What could be wrong?
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Registered:
October 2005
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Re: Water/Rust type stains around Spark plug wells!
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Mon, 03 October 2005 01:55
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bump
come on, surely someone knows what it is?
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Location:
Forster NSW
Registered:
September 2004
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Re: Water/Rust type stains around Spark plug wells!
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Mon, 03 October 2005 02:07
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1) Does the level in the radiator actually drop?
2) Is water getting onto the leads somehow and running down into the spark plug wells? How are your leads?
It's not like any water hoses run anywhere near where they'd leak water into the spark plug wells from above... and I can't really see water galeries leaking into the spark plug wells without you knowing something was majorly wrong!
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Registered:
October 2005
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Re: Water/Rust type stains around Spark plug wells!
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Mon, 03 October 2005 02:17
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| Dale_ta22 wrote on Mon, 03 October 2005 12:07 |
1) Does the level in the radiator actually drop?
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The reserve tank drops from Full to empty over a period of about 2-3 weeks
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2) Is water getting onto the leads somehow and running down into the spark plug wells? How are your leads?
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Not that i know off. It seems to be coming from inside the spark plug wells, which are deep, as it's a DOHC engine. But the buildup itself, is only on the tops, none around the visible insides. The leads seem fine.
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It's not like any water hoses run anywhere near where they'd leak water into the spark plug wells from above... and I can't really see water galeries leaking into the spark plug wells without you knowing something was majorly wrong!
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i know there aren't hoses from above, but i'm not sure about how they work inside the engine. So what else could this buildup be? like i said, the first time, it was a rusty brownish powder. My coolant was slightly rusty at the time, but still predominantly green. Now i have flushed it, and it's coming out bluey green, like battery acid. Feels and looks like it too. I don't see how my battery acid would get there though, so i'm confused.
Could it be the spark plugs by anychance? like i said, the problem started when i changed the plugs from NGK to Denso. The denso's seem slightly different, in that the ceramics are a bit thicker, making it harder to pull the leads on and off.
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Location:
tallahassee FL usOFa
Registered:
May 2002
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Registered:
October 2005
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Re: Water/Rust type stains around Spark plug wells!
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Mon, 03 October 2005 02:33
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not the overflow tank, the other one..i don't have an overflow tank.
the radiator level itself..how do i check that? just pop the cap off, and see if i can see coolant?
I'm sure there's a leak, when the engine is hot, and i press the water hose, it's meant to be full of pressure, except i can press it easily as if the engine is cold. but i can't find a leak and have been looking for a long tiem
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Location:
Forster NSW
Registered:
September 2004
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Re: Water/Rust type stains around Spark plug wells!
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Mon, 03 October 2005 04:02
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| Quazz wrote on Mon, 03 October 2005 12:33 |
not the overflow tank, the other one..i don't have an overflow tank.
the radiator level itself..how do i check that? just pop the cap off, and see if i can see coolant?
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yes, it should be pretty much at the top. Don't touch the overflow tank and see if it drops.
Is it just slight oxidation or what? And is it on the spark plug tubes or the spark plugs themself?
| Quazz wrote on Mon, 03 October 2005 12:33 |
I'm sure there's a leak, when the engine is hot, and i press the water hose, it's meant to be full of pressure, except i can press it easily as if the engine is cold. but i can't find a leak and have been looking for a long tiem
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I think if there was a leak you'd notice a puddle of water under the car (not from the air con condenser), or steam coming out of the engine while it's running, not saying you're wrong, but if there's a leak you tend to know about it easily.
The pressure builds up if you hold it while the engine is running at a temperature warm enough to have the thermostat open, it may not really be that noticable, but you'll notice the hose is warm/hot
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Registered:
October 2005
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Re: Water/Rust type stains around Spark plug wells!
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Mon, 03 October 2005 04:27
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there is nothing on the actual nothing really on the lead..a tiny bit, but only where it's in contact with the engine itself.
My leads have square tops. The residue, is around the square top part. It's visible without removing the leads. i can open my bonnet and see it there straight away.
I'll check the radiator level next time, as it's full atm. I refilled about 5 days ago.
The hose wasn't pressurised, after i'd been driving for 45 mins, the thermostat was open and it most definately should have been pressurised by then. Which makes me think something is wrong somewhere, but i don't know when. As i said, i have looked extensively for leaks but can't find one.
I checked again, and maybe i was wrong, it's more a whitey bluey colour than a bluey greeny one. Anyway, i will replace my plugs tomorrow and see if that makes a difference. I'm going back to NGK. It won't solve my coolant leak, but it might? solve my residue thingi.
I simply cannot work out where the residue is coming from.
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Registered:
October 2005
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Re: Water/Rust type stains around Spark plug wells!
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Wed, 05 October 2005 16:10
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come on, surely someone can help me?
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