Cold Case radiator, rust spots? - Chevelle Tech
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post #1 of 15 (permalink) Old Dec 8th, 19, 6:10 PM Thread Starter
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Cold Case radiator, rust spots?

The radiator is 1.5 yrs old. Wonder why I get these spots (rust?) on all 4 corners, core leaking or just grime from engine bay?

I run distilled water with Red Line water weater, no antifreeze.

Changing engines, would like to make sure the radiator is in good shape before it goes back in.

Thanks for any advise.
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post #2 of 15 (permalink) Old Dec 8th, 19, 6:48 PM
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Re: Cold Case radiator, rust spots?

Have you pressure tested the radiator? Looks like aluminum so I would not expect rust..
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post #3 of 15 (permalink) Old Dec 8th, 19, 6:51 PM
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Re: Cold Case radiator, rust spots?

Sure looks like corrosion...but on an aluminum radiator

Must be contaminates in the aluminum.

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post #4 of 15 (permalink) Old Dec 8th, 19, 9:06 PM Thread Starter
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It is aluminum, that’s why this is strange. I can think of what else can it be really. I haven’t pressure tested it, it’s outside of the car, I should probably find a shop to do that.
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post #5 of 15 (permalink) Old Dec 8th, 19, 9:20 PM
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Re: Cold Case radiator, rust spots?

did you spill any of the water wetter??
ask the manufacturer what this could be...
it does look strange though..

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post #6 of 15 (permalink) Old Dec 8th, 19, 9:35 PM Thread Starter
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I did not, and if I did it’d be on the cap/driver side, strange thing is all 4 corners have that corrosion which confuses me. Been trying to clean it w/Simple Green, scrub it a bit and it’s not coming off so it’s not surface rust, really strange.

I’ll contact Cold Case next week to see what’s up.
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post #7 of 15 (permalink) Old Dec 9th, 19, 4:58 PM Thread Starter
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I spoke w/Cold Case, sent the pictures and they will replace the radiator.

That’s great that they stand by their product considering the minimal miles it has on it 👍
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post #8 of 15 (permalink) Old Dec 9th, 19, 5:01 PM
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Re: Cold Case radiator, rust spots?

That's excellent customer service!
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post #9 of 15 (permalink) Old Dec 9th, 19, 5:38 PM
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Re: Cold Case radiator, rust spots?

I'm just curious to see the inside.
How does the inside down the filler tube look?

Where do you live?

Water and water wetter won't protect it like adding a little coolant will. I'd try a green 50/50 mix on your replacement.
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post #10 of 15 (permalink) Old Dec 9th, 19, 7:22 PM
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Glad it will be replaced under warranty. Things like this always influence my future purchases

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post #11 of 15 (permalink) Old Dec 10th, 19, 8:49 AM
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Re: Cold Case radiator, rust spots?

Quote:
Originally Posted by yanniziomas View Post
I spoke w/Cold Case, sent the pictures and they will replace the radiator.

Thatís great that they stand by their product considering the minimal miles it has on it 👍

Did they give any indication as to why it was doing it ? Like the others said if it is aluminum it shouldn't be "rusting" unless it is leaking and the entire cooling system is rusty.

Is this a street car or a race car ? If its on the street I would certainly be running some type of coolant.


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post #12 of 15 (permalink) Old Dec 10th, 19, 11:29 AM
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Re: Cold Case radiator, rust spots?

I have been using a Cold Case radiator for a few years now and I have no sign of corrosion however I use antifreeze. Your pics almost look like its discolored from the flux used in solder and possibly not cleaned after assembly. Although most damage is caused by not using distilled water, which you are, water alone does not provide any protection. Here is a decent article on the subject with some possible causes.
https://appliedspeed.com/blogs/tech/...d-create-leaks
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post #13 of 15 (permalink) Old Dec 10th, 19, 1:43 PM
 
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Re: Cold Case radiator, rust spots?

I just saw this topic. I was going to say to do a pressure test on it. Sure looks like a tiny weep hole.

Before you install the new radiator, I'd flush the motor. Sure looks like you have some junk going on in the motor if that radiator is in fact weeping.
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post #14 of 15 (permalink) Old Dec 10th, 19, 2:53 PM Thread Starter
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Thanks everyone.

The whole cooling system was flushed when I installed this radiator new, and also new water pump at the time.

I’m putting a new crate engine in the car over the winter, so the replacement radiator will go in at the same time with a clean block/engine.

I will also flush the heater core and lines before all this goes back in.

I do use distilled water, the radiator is leaking somewhere, but it happens. Important thing is that the manufacturer is taking care of the issue, and I know that’s what is important to many of us. the radiator has been great in keeping the car cool 👍
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post #15 of 15 (permalink) Old Dec 10th, 19, 4:10 PM
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Re: Cold Case radiator, rust spots?

Really like mine in the '68. Good to see they are standing behind it...
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