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Old 05-19-2008, 12:43 PM   #1
dwmoss_68
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Join Date: Apr 2001
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04 Gold FXT
07 WRB FXT Sport

Default Turbo Coolant Reservoir - pinhole leak advice

USDM 02 wrx wagon
164,000 miles

replaced OEM rad at 142,000 due to standard seam split with a 02 koyo replacement (no cap on rad) and went to silicone rad hoses at the same time.

I noticed some coolant on top of my turbo coolant reservoir. I first thought it was the radiator cap going bad after 6 years, so I picked up a replacement cap at the local autozone (16psi - 1.1 bar).

I still had some leakage on top of the turbo coolant reservoir. So looking more closely it appears I have a pin hole on the top cover of the reservoir, where the base of the part which the rad cap mounts to.

A few quick questions:

Has anyone had a similar issue??

Is it possible to get only the top part of the reservoir?

How big of a pain is it to replace the whole turbo coolant reservoir?
(I'm tempted to get the whole reservoir but only replace the top part)

Any recommendations on a temporary patch until I can get in the replacement parts??

dm

pic to make sure I'm calling out the right part....


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Last edited by dwmoss_68; 11-19-2011 at 10:28 AM.
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Old 05-19-2008, 02:13 PM   #2
rkramer
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hard to tell from the pic, obviously some corrosion there, but I would be MUCH more likely to suspect one of the hoses that attaches to it, not the metal itself. If it has corroded that much, i'd be seriously worried about the life of the engine and would be looking at trading asap.
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Old 05-19-2008, 02:15 PM   #3
Rokkit
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That piece isnt bad to change out. You should look at the part out forums and see if someone has one out of a low mileage wrx of some sort.

Just replace the whole thing and be done with it, heh.
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Old 05-19-2008, 02:17 PM   #4
dwmoss_68
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I was able to see bubbling at the base.. that's why I don't think it's the hoses.

And thanks for the trading advice, but she's like my high school sweetheart. I just can't trade her in!!
I only wish my high school years were only 7 years ago, but I hope you understand the analogy.

dm
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Old 05-19-2008, 08:22 PM   #5
dwmoss_68
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ordered a replacement tank and hoses through subiegal. i'll update the post after install
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Old 05-19-2008, 09:43 PM   #6
rkramer
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i guess i wouldn't be worried yet, take the top of the coolant tank off and see if the corrosion started on the inside or the outside. If it started inside, it isn't the only piece that has corroded, just the first to fail.
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Old 05-21-2008, 11:25 PM   #7
The_Prodigy
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I'd do a cooling system pressure test before replacing any parts. If you apply pressure into the system, you'd acutally see where's leaking from.
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Old 05-22-2008, 12:55 PM   #8
dwmoss_68
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Well I do see bubbling and leaking from the neck of the turbo coolant reservoir.
I also get the coolant leaking/collecting on top of the reservoir.

At first I thought it was the radiator cap, changed that and still had the issue. Looked closer and found the source, so I'm pretty sure I need to change out the reservoir.

It should be arriving today or tomorrow.
The install looks not to bad, but I'm having a problem finding the cooling section of my 02 wrx service manual. Oh well....

Thanks for the responces, also for you early bugeye owners, I did find a mod on scooby mods where thoses with the black paint reservoir covers had peeling paint on the inside.

dm
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Old 05-23-2008, 11:32 AM   #9
dwmoss_68
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I received the replacement tank yesterday, and it looks like the one in our FXT, and it's plastic. So no chance of replacing the lid only!! =)

No problems should go smooth!!

dm
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Old 05-24-2008, 09:50 AM   #10
dwmoss_68
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Installed new plastic reservoir last night.

No problems, volume seems slightly smaller with the plastic reservoir, but as I posted before it appears to be the same on our 07 FXT.

Anyway thanks for all the help...

dm




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Old 03-09-2009, 10:59 PM   #11
khellen9
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Hate to zombie res this thread...but I'm having the same problem, odd...I'll have to post back here once I figure out what's going on.
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Old 03-10-2009, 12:34 PM   #12
dwmoss_68
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Quote:
Originally Posted by khellen9 View Post
Hate to zombie res this thread...but I'm having the same problem, odd...I'll have to post back here once I figure out what's going on.
Maybe it's a PA thing???

Good luck, I've had no problems with the replacement plastic tank. That should be all you need as well.

dm
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Old 04-20-2009, 01:33 PM   #13
khellen9
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Forgot to repost in this thread, it most definatly is a pinhole at the neck of the reservoir tank. A few weeks ago I noticed air bubbles coming out of it, I'll post some pics. I'm going to have to buy a new reservoir as well.

Looks pretty hilarious when I get done driving, big plume of steam coming out of my hood vents.
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Old 04-24-2009, 12:31 PM   #14
knightsofnii
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exact same thing happening to mine, pinhole at the seam where the little piece of pipe is sticking up, that the cap mounts to. I think it's welded from underneath, can see bubbles, I got it marked off, i'm just gonna try to clean it up and jbweld it.
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Old 04-25-2009, 10:42 PM   #15
dwmoss_68
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07 WRB FXT Sport

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good luck fixing the hole/holes, pick up the replacement plastic one and be done with it!!

dm
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