Holts Radweld (aka? Subaru coolant conditioner) - thoughts? - Subaru Forester Owners Forum
Subaru Forester Forum
ebay search
Subaru Forester Forum
Go Back   Subaru Forester Owners Forum > Technical Forums and Vehicle Assistance > Problems, Maintenance, and Warranty
SubaruForester.org is the premier Subaru Forester Forum on the internet. Registered Users do not see the above ads.
User Tag List

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old 12-21-2009, 07:19 AM   #1 (permalink)
Forum Member
 
hora's Avatar
 
Join Date: Oct 2008
Posts: 412
Location: Manchester, UK
Car Year: 2004
Car Model: 2.0 X
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Default Holts Radweld (aka? Subaru coolant conditioner) - thoughts?

On google I find alot of people 'anti' conditioner/Radweld etc as it clogs up the coolant system?

Are there are pro folks on here who have used Radweld etc? I wouldnt use the whole bottle to be honest. Probably about 1/4 of a bottle.
hora is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-21-2009, 07:26 AM   #2 (permalink)
The Modfather
 
Peaty's Avatar
 
Join Date: Jan 2006
Posts: 7,281
Location: Lawrence, KS - Rock Chalk
Car Year: 2010
Car Model: Legacy 3.6R Limited
Transmission: 5EAT
Gallery: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Feedback Score: 9 reviews
Default

Subaru requires it in the states at coolant changes so I suppose it can't be that bad.

http://www.scoobymods.com/wwp_99_pha...93.html?t=2993

I mean if they are using like they are supposed to, then lots of scoobies have it in the system. I don't know I've heard of a ton of issues. I agree I don't like putting "stuff" in the coolant but they must have done some sort of testing to require using it.
__________________
Peaty

2010 Leg 3.6 R, 2013 OB, 2001 OB, 2001 Forester S and 1999 Miata
Peaty is online now   Reply With Quote
Old 12-21-2009, 08:28 AM   #3 (permalink)
Forum Member
Thread Starter
 
hora's Avatar
 
Join Date: Oct 2008
Posts: 412
Location: Manchester, UK
Car Year: 2004
Car Model: 2.0 X
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Default

I agree. Plus my thinking is dont put the whole bottle in one go. Put 1/4-1/2 max.
hora is offline   Reply With Quote
Old 12-21-2009, 08:40 AM   #4 (permalink)
Forum Member
 
Join Date: Mar 2009
Posts: 2,218
Location: Cleveland/Shaker Heights, Ohio
Car Year: 2013
Car Model: Forester XT Touring
Transmission: 4EAT
Gallery: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Feedback Score: 3 reviews
Default

Like Peaty said, ALL of the "by Hoyle" Subaru literature here in the US insist that the Subaru Coolant Conditioner is a requirement.

But I know that in the enthusiast/hobbyist circles, its use is indeed still much debated.

Like I said here:

Coolant Change - Page 11 - Subaru Legacy Forums

I'm OK if an individual end-user doesn't use it, due to his/her personal beliefs and/or experience.

I'm OK if a dealership either recommends it, based on Subaru's official lines, or, alternatively, if they tell you of that, and then recommend that you not, but then say that it's specifically based on their experience, and that it's their professional or personal opinion that you do not.

There's good reasoning, either way.
__________________
'13 Tribeca
'13 XT Touring
5th Subaru family
TSi+WRX is offline   Reply With Quote
Old 12-21-2009, 02:02 PM   #5 (permalink)
Forum Member
 
Join Date: Nov 2009
Posts: 312
Location: SCOTLAND
Car Year: 2000
Car Model: 2 Outbacks
Transmission: 1Man , 1 Auto
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Cool

For "Conditioner" substitute the words "Leak Stopper" . Have a good bit of experience of using 'BARS LEAKS' , and similar to 'RADWELD' , in the past on older cars and could last for years . A great coolant system additive for stopping minor leaks in capillary tubes in radiators but would never stop a major leak at a busted weld for example or big cracks. The construction of radiators nowadays seems flimsy compared to days gone by and this I think is where Subaru are coming from. The major parts of the radiator shouldn't fail but the flimsy capillaries and fins don't give them the same confidence!. As I say it wont stop a major leak and so will never be a factor in clogging the system so rest easy.

Last edited by GEORGEROV; 12-21-2009 at 04:07 PM.
GEORGEROV is offline   Reply With Quote
Old 12-22-2009, 12:10 AM   #6 (permalink)
Forum Member
Thread Starter
 
hora's Avatar
 
Join Date: Oct 2008
Posts: 412
Location: Manchester, UK
Car Year: 2004
Car Model: 2.0 X
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by GEORGEROV View Post
For "Conditioner" substitute the words "Leak Stopper" . Have a good bit of experience of using 'BARS LEAKS' , and similar to 'RADWELD' , in the past on older cars and could last for years . A great coolant system additive for stopping minor leaks in capillary tubes in radiators but would never stop a major leak at a busted weld for example or big cracks. The construction of radiators nowadays seems flimsy compared to days gone by and this I think is where Subaru are coming from. The major parts of the radiator shouldn't fail but the flimsy capillaries and fins don't give them the same confidence!. As I say it wont stop a major leak and so will never be a factor in clogging the system so rest easy.
When I had my cambelt changed the radiator/coolant hose blew off as it wasnt tightened up (emptying the contents of the radiator allover) and the pully bolts squealed as they also weren't torqued. So its a fair guess that maybe the radiator was 'nicked when placed on the floor or removed/refitted. Before the cambelt change the coolant level was fine.
hora is offline   Reply With Quote
Old 12-22-2009, 12:58 AM   #7 (permalink)
Forum Member
Thread Starter
 
hora's Avatar
 
Join Date: Oct 2008
Posts: 412
Location: Manchester, UK
Car Year: 2004
Car Model: 2.0 X
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Default

Holts technical care rang back. Yes its the same stuff as Subarus and yes its safe for non-turbo use.
hora is offline   Reply With Quote
Old 12-22-2009, 03:42 AM   #8 (permalink)
Forum Member
 
ddavidv's Avatar
 
Join Date: Jul 2008
Posts: 1,219
Location: Elizabethtown, PA
Car Year: 02
Car Model: Forester L (sold)
Transmission: Manual
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 3 reviews
Default


Not Subaru-specific, but I've used this stuff for years with good results at stopping small weeping annoyances such as freeze plugs and radiator seals. It may not be as useful in attempting head gasket leaks because it needs oxygen to activate it, but it definately does not clog anything.
__________________
'02 L m/t. Insurance adjuster 4 U.
ddavidv is offline   Reply With Quote
Old 12-22-2009, 04:40 AM   #9 (permalink)
Super Moderator
Lifetime Supporting Member
 
crewzer's Avatar
 
Join Date: Apr 2009
Posts: 4,152
Location: Mills River, NC, USA
Car Year: 2012
Car Model: Forester X Prem AWP
Transmission: 5MT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 1 reviews
Arrow

Related article from End Wrench.

HTH,
Jim / crewzer
__________________
12 Forester 2.5X FB25 5MT Premium AWP PZEV
09 Forester 2.5X EJ25 5MT Premium AWP PZEV (sold 7/2011)
crewzer is offline   Reply With Quote
Old 12-22-2009, 04:49 AM   #10 (permalink)
Forum Member
Thread Starter
 
hora's Avatar
 
Join Date: Oct 2008
Posts: 412
Location: Manchester, UK
Car Year: 2004
Car Model: 2.0 X
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by crewzer View Post
Related article from End Wrench.

HTH,
Jim / crewzer
All the reassurance that I need. Question- the non-turbo coolant system. How many litre's is it?
hora is offline   Reply With Quote
Old 12-22-2009, 11:53 AM   #11 (permalink)
Forum Member
 
Tremo's Avatar
 
Join Date: Mar 2009
Posts: 270
Location: Silicon Valley, California
Car Year: 2002
Car Model: Forester S
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Default

The local WRX/STI racers told me NOT to use the Subie conditioner, as did a local independent Subie specialist mechanic. Both said it clogs things up, and is basically there as a band-aid for the head gasket issues.

You know, there are some pellets that GM tells you to drop in the radiator when you do a flush and refill on one of their cars, I wonder whatever that is would work here?
__________________
04 Outback 5MT
02 Forester S 4EAT
88 IROC-Z T5
Tremo is offline   Reply With Quote
Old 12-22-2009, 11:57 AM   #12 (permalink)
Forum Member
Thread Starter
 
hora's Avatar
 
Join Date: Oct 2008
Posts: 412
Location: Manchester, UK
Car Year: 2004
Car Model: 2.0 X
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by Tremo View Post
WRX/STI
My car is a non-turbo car with lower-strain/etc and a potential radiator leak. The 2.5 Legacy's in the States are also non-turbo? (I am guessing on the second bit).
hora is offline   Reply With Quote
Old 12-22-2009, 12:34 PM   #13 (permalink)
Super Moderator
Lifetime Supporting Member
 
crewzer's Avatar
 
Join Date: Apr 2009
Posts: 4,152
Location: Mills River, NC, USA
Car Year: 2012
Car Model: Forester X Prem AWP
Transmission: 5MT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 1 reviews
Arrow

Quote:
Question- the non-turbo coolant system. How many litre's is it?
Hora,

The coolant capacity for my '09 U.S. spec Forester with the 2.5 N/A (non-turbo) engine and manual transmission is 7.2 U.S. qt. / 6.8 litres / 6.0 Imp. qt. (ref Owner Manual pg. 12-4).

The non-turbo with the AT is 7.1 / 6.7 / 5.9, and the turbo w/ AT is 8.5 / 8.0 / 7.0, all respectively.

I don't know if this correlates to your 2004 with the 2.0 engine.

HTH,
Jim / crewzer
__________________
12 Forester 2.5X FB25 5MT Premium AWP PZEV
09 Forester 2.5X EJ25 5MT Premium AWP PZEV (sold 7/2011)
crewzer is offline   Reply With Quote
Old 12-22-2009, 01:10 PM   #14 (permalink)
Forum Member
 
vintage42's Avatar
 
Join Date: Sep 2007
Posts: 4,286
Location: Louisville, KY
Car Year: 2008
Car Model: LL Bean (4EAT)
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Feedback Score: 1 reviews
Default

Quote:
Originally Posted by Tremo View Post
The local WRX/STI racers told me NOT to use the Subie conditioner, as did a local independent Subie specialist mechanic. Both said it clogs things up... there are some pellets that GM tells you to drop in the radiator when you do a flush and refill on one of their cars...
Quote:
"... Whenever the coolant is changed, you must add Genuine Subaru Cooling System Conditioner, (P/N SOA635071). Itís been tested and approved for Subaru aluminum engines and radiators. Do not use aftermarket coolant reinforcement agents, sealers and/or flushing agents as those chemicals could corrode aluminum parts, or cause clogging..."
http://endwrench.com/images/pdfs/CriticalCooling.pdf
Some would go with go with the racers, mechanics and pellets.
vintage42 is offline   Reply With Quote
Old 12-22-2009, 02:55 PM   #15 (permalink)
Forum Member
 
Join Date: Mar 2009
Posts: 2,218
Location: Cleveland/Shaker Heights, Ohio
Car Year: 2013
Car Model: Forester XT Touring
Transmission: 4EAT
Gallery: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Feedback Score: 3 reviews
Default

^ If by citing the above-mentioned "by-Hoyle" Subaru-literature, that such a recommendation is inherently superior then what we have as "community knowledge and know-how, I find that hard logic to follow.

There have been, time-and-again, errors in the Subaru "official" literature, as well as ill-conceived/executed products - for which we as a community have only come to realize specifically due to the knowledge and experiences of our fellow enthusiasts and hobbyists - the "racers, mechanics, and pellets."

This is why I don't particularly take exception to those who refuse to use the Conditioner in their vehicle - as long as they can provide good reason (and to-note, there now have been people who've torn-down their blocks and undertaken drastic re-builds of their late-generation Subarus, after many tens of thousands of miles and years WITHOUT the use of the Conditioner, that notice no issues, upon detailed examination, with either their cooling system or headgasket).

To me, until we've got more hard-data, it's a toss-up, particularly given the sheer number of highly-experienced Subaru professionals as well as enthusiasts/hobbyists that recommend specifically against the use of this product.


----


Quote:
Originally Posted by hora View Post
My car is a non-turbo car with lower-strain/etc and a potential radiator leak. The 2.5 Legacy's in the States are also non-turbo? (I am guessing on the second bit).
^ It depends on the model - we've got both turbo and non-turbo 2.5L variants, in the Legacy platform for both of the latest two generations.

Subaru's official statements, again, recommends the use of their Conditioner product for *ALL* Subaru vehicles, including the turbocharged variants.

Me, personally? Yes, I use the Conditioner in my '05 Legacy 2.5GT, which is, indeed, turbocharged.
__________________
'13 Tribeca
'13 XT Touring
5th Subaru family
TSi+WRX is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Subaru Forester Owners Forum > Technical Forums and Vehicle Assistance > Problems, Maintenance, and Warranty

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 08:29 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.