Devcon, egg or pepper?

Submitted: Thursday, Jan 14, 2010 at 23:54
ThreadID: 75217 Views:3237 Replies:7 FollowUps:4
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Sprung a leak in the magna radiator right up top next to the filler cap. Its only very small, probably between a match head and a pin head and only leaks when is at operating temp.

What i want to know is what should i use to repair it? (NO,I havent dropped an egg or any pepper in yet.)

Should i use some of the radiator repair stuff at the local auto shop or maybe devcon. Great stuff Devcon, but will it handle the pressure of the radiator?

Am i better off getting it soldered by radiator joint. Its really just my work hack so i dont wanna have to spend money on it if i dont have to, but at the same time i want a reliable repair. a mechanic mate once told me he repaired radiators with devcon, but i cant remember if he was pulling me leg or not.

Any suggestions folks?


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Reply By: Member - Stuart P (WA) - Friday, Jan 15, 2010 at 00:05

Friday, Jan 15, 2010 at 00:05
take it to a radiator joint
AnswerID: 399475

Reply By: Member - Serendipity(WA) - Friday, Jan 15, 2010 at 00:11

Friday, Jan 15, 2010 at 00:11
I thing Stuart is right. A small leak is indicating that the radiator is breaking down. You could fix this with some stop leak or such in the short term. Devcon is too hard and brittle.

Later you will probably spring a leak somewhere else.


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AnswerID: 399477

Reply By: pop2jocem - Friday, Jan 15, 2010 at 01:26

Friday, Jan 15, 2010 at 01:26
Yep, a small leak now is an indication of a very sick radiator later, as said Devcon is good stuff in certain areas IMHO radiators is not one of them. A pretty good temporary fix Bars-leak, a lasting repair as also said take it to a radiator shop

Cheers Pop
AnswerID: 399489

Follow Up By: Member - Wamuranman - Friday, Jan 15, 2010 at 07:09

Friday, Jan 15, 2010 at 07:09
Yes Barrs Radiator Leak does work Ok - I have used it for leaks as you describe and has stopped the leak for years in old tractor. Just empty granules into radiator and run for 20 minutes at operating temperature. But as has been said if you are going to keep the car for the long term -you may as well get it fixed properly or a new radiator.
FollowupID: 668451

Follow Up By: Ozhumvee - Friday, Jan 15, 2010 at 08:00

Friday, Jan 15, 2010 at 08:00
Even on a old hack a crook radiator can and probably eventually will cost you an engine.
Get it looked at and if need be replace the radiator.
I would have thought that a magna would have a plastic radiator. Once a plastic radiator gets brittle tanks there is no fixing them just either replace the tanks or the whole thing.
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Reply By: Member - Phil G (SA) - Friday, Jan 15, 2010 at 10:11

Friday, Jan 15, 2010 at 10:11
I've had many dodgy old cars in the past, and the two part epoxy stuff was great - pretty much lasted forever.
AnswerID: 399528

Follow Up By: Road Warrior - Friday, Jan 15, 2010 at 12:40

Friday, Jan 15, 2010 at 12:40
I've done this before for a motorbike radiator and it has lasted, but I am inclined to agree with what the others have said about getting it repaired properly - a small leak now is a sign of more deep seated problems with your radiator.
FollowupID: 668508

Follow Up By: Member - Phil G (SA) - Friday, Jan 15, 2010 at 22:50

Friday, Jan 15, 2010 at 22:50
Yep, but the original post said "Its really just my work hack".
I wouldn't do that sort of repair on a good vehicle or one used outside the metro area.
FollowupID: 668607

Reply By: signman - Friday, Jan 15, 2010 at 10:54

Friday, Jan 15, 2010 at 10:54
I did a 'temporary' repair to a seam leak in the Troopy on a Cape York trip.
I used that 2-part epoxy putty. Over 2 yrs down the trcak and it's still just fine !!

AnswerID: 399534

Reply By: gbc - Monday, Jan 18, 2010 at 16:36

Monday, Jan 18, 2010 at 16:36
saxa fine black table pepper.
I never leave home without it.
AnswerID: 400039

Reply By: Member - Norm C (QLD) - Monday, Jan 18, 2010 at 18:06

Monday, Jan 18, 2010 at 18:06
The two part stuff others have referred to is probably Kneed It.

Great stuff and should be in every travellers tool kit.

I have used it three times that I can think of:

1. On the radiator of a Troopy (not mine) on Mitchell Plateau. The owner had hit a water crossing a bit fast and put the fan blade through the radiator.

2. At Windjana Gorge where a Hilux (from memory) had a split in the fuel tank down a corner weld.

3. The only time I used it on something of my own was when slashing the driveway on our 20 acre toy farm, I hooked the tractor on a tap and ripped it off. This tap was on the main line from the road to the house. It was a Sunday afternoon around 5.00 PM and no plumbing supply or hardware shops open. I rarely call a plumber and certainly wasn't going to this time. I turned the water off, plugged up the broken pipe with Kneed It and let it set for about 45 mins. Turned the water back on and not a leak. It stayed like that till the next week - end when I got the bits and pieces to repair properly.

Available at Bunnings and lots of other places. Might be worth a go.

Norm C

AnswerID: 400051

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