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 Post subject: Once in a while things happen... leaking HG
PostPosted: Thu Mar 09, 2017 6:30 am 
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RomRaider Donator

Joined: Tue Oct 25, 2011 7:00 am
Posts: 1008
Location: Stockholm, Sweden. Sea level.
Hi!

So my FXT has been running happy for quite a while now, but then one day it decided it was time to build pressure, temp go into the red, and push out coolant into the reservoir.

So I had the coolant checked for gases and there is both HC and CO present = head gasket leaking pressure into the water.

The thing is the car still works fine, when I drive slow and calm the coolant is no issue and neither is the temperature. It's after a couple of fun wot's that the coolant/overheating issue happens. Usually I can do 10 good wots before I notice the temp rises.

So... the leak is probably very very small...

I found this product when googling: Subaru Coolant Conditioner
http://www.scoobyenthusiast.com/subaru- ... soa635071/

Subaru Sweden do not sell this product.

Would you guys try pouring this "sealant" into the coolant and see if that helps, or is that a waste of time and just start saving up for that engine rehaul?

Has anyone here used this additive on a car that is tuned? Would it be harmful for any other components?

Car has 110,000 km on it and runs well... except for that annoying overheating issue.

:)
Patrick

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2007 EDM FXT 4EAT
24 psi from STS TD06SL2/60-1 billet, STI TMIC, Cobb dp+exhaust, ID1000, HKS RSK, Walbro 255, GS EBCS, STI sway bars and Brembos.


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 Post subject: Re: Once in a while things happen... leaking HG
PostPosted: Thu Mar 09, 2017 8:50 am 
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Newbie

Joined: Sat Oct 29, 2016 5:40 pm
Posts: 61
The Subaru coolant conditioner is simple holtz radweld. Awful s*** that can kill your thermostat, water pump and both radiators. Do not risk it but just change the gaskets. Sooner or later it will happen even if you use some "miracle bottle" such as this Holtz stuff. There is a long discussions how this stuff works and it harms more than it helps.


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 Post subject: Re: Once in a while things happen... leaking HG
PostPosted: Thu Mar 09, 2017 9:44 am 
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Experienced

Joined: Fri Feb 25, 2011 5:27 pm
Posts: 367
Location: Romania
if you check the coolant level every day and keep it full / purge the air it will work for several months probably (it's overheating as a result of coolant missing) , you can also use a thermostat with a hole (open all the time) ... it will get worse slowly and in the end replacing HG is the solution


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 Post subject: Re: Once in a while things happen... leaking HG
PostPosted: Fri Mar 10, 2017 1:19 pm 
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RomRaider Donator

Joined: Tue Oct 25, 2011 7:00 am
Posts: 1008
Location: Stockholm, Sweden. Sea level.
Thanks for your replies!

I will avoid the additive, just as my mechanic told me. :mrgreen:

I have a set of Wiseco pistons waiting to replace the stock ones too, so slowly aiming for a major overhaul... You guys agree that Cosworth is the best HG?

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Honored to be a RomRaider donator!
2007 EDM FXT 4EAT
24 psi from STS TD06SL2/60-1 billet, STI TMIC, Cobb dp+exhaust, ID1000, HKS RSK, Walbro 255, GS EBCS, STI sway bars and Brembos.


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