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Wet Around the Radiator Cap How to Diagnose Leaky Worn Radiator Cap

Created on: 2019-07-08

Watch this video to find out what to look for on the radiator cap on your 07-14 Toyota FJ Cruiser to determine if it needs to be replaced.

  1. step 1 :Inspecting the Radiator Cap
    • Remove the cap only when the coolant system is cool.
    • Check the area around the cap for residue from coolant leaks
    • Remove the cap
    • Press in the center area to check for free movement and a working spring
    • Check the condition of the outer rubber seal for cracks, dry rot or stiffness

Hey, friends. It's Len here at 1A Auto. Today, we're working on a 2007 Toyota FJ Cruiser, and I'm going to show you how to diagnose a coolant smell.

So, if you want to come right over here, let's say we pop our hood and you smell this sweet smell in the air. Smells a little funny. Doesn't smell normal. Take a peek around. Generally speaking, one of the first things that will go bad on your cooling system when you smell something like that would be your radiator cap. There's a little plunger in there, and when that goes bad, it'll actually vent, which is what it's supposed to do, it'll vent, and you'll start seeing these white crusties. They come all around. Sometimes, you'll see green or even pink, sometimes white. Okay? Comes right down here.

This has been venting pretty good to the point that it's been coming out and even dripping. That would tell me that this radiator cap is no good. What I would do at that point is I would go ahead and replace it. Let's say that we'd replace it. We do sell these at 1aauto.com, by the way. I want to check the fluid, so I'm going to grab my safety glasses. Make sure that I have eye protection, hand protection, because coolant's a chemical. I'm going to keep my mouth closed. We want to make sure that the radiator cap's nice and cool. We didn't just come back from the beach, a nice, long drive, or anything like that. It's cool to the touch, it hasn't been running in a while.

You're going to press down, turn to the left, lift it up. Coolant may or may not come out. Keep that in mind. Keep your eyes protected. Here we go, I'm pushing down. Okay. Got some coolant there. There we are. Here's the inside of our radiator cap. Right here's the little plunger area that I was mentioning to you. Lot of times, the spring in there goes bad, and other times, you'll see it looks like the gasket that runs along there is dry rotted or cracked, which happens a lot. They get really stiff. This one's actually really stiff. It's just not cracked yet. Right along here, you can see where the gasket itself has some damage to it. That's where it rides inside that lip inside your radiator. You can't see it right now, because the coolant's up, but that should hit up against the lip. This is all cracked up, and it's super dry.

I would go ahead and replace this. 1aauto.com.

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How To Replace Radiator 1992-2001 Chevy Suburban PART 2

Learn how to replace the radiator in your 92-01 Chevy Suburban with this step by step video from 1A Auto. This is part 2.

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