00:00Ok, so here's a part that almost nobody thinks about until they're standing on the shoulder
00:04with steam pouring out of the hood, the radiator cap. That little thing holds your entire cooling
00:09system under pressure, and when the seal goes bad, coolant starts pushing into the overflow
00:14tank and disappearing. I went digging and found five of the best-selling, best-rated caps out
00:19there right now, all of them cheap enough that there's really no excuse to keep driving on a
00:23tired one. Let's get into it. First up is the expansion tank cap for Mercedes-Benz,
00:30and this thing fits an absurd number of models. A-Class, B, C, E, G, G, M, R, C, S,
00:36S, V, C, L, A,
00:37C, L, K, G, L, A, G, L, B, plus the W203, W204, W210, and W211 chassis. If you've got
00:45a Benz that's
00:46leaving little crusty coolant trails around the reservoir, this is almost always the culprit.
00:51It's $5.16, it's sold nearly 5,000 units, and it's holding a 4.7 rating. For a European car
00:59part,
00:59paying $5 instead of $40 at the dealer feels like getting away with something.
01:04Next, we've got the radiator cap that covers the GM and Opel family, Vauxhall Astra, Insignia,
01:10Buick, Chevy Cruze, Opel Astra, Cadillac, even Saab. If you own a Cruze, you already know these caps
01:17are a known weak point, the seal hardens up and suddenly you're topping off coolant every couple
01:21of weeks. $4.52. That's it. Over 4,700 sold with a 4.8 rating, which tells you people are
01:31buying these,
01:32installing them, and the problem goes away. Honestly, buy two and keep a spare in the glovebox.
01:38Now this one's my personal pick of the bunch, the expansion tank cap for Audi.
01:43A 1, 3, 4, 5, 6, 7, Q5, and TT. What makes it stand out is the rating,
01:51a straight 5 out of 5 across more than 4,600 sales. That basically doesn't happen unless the
01:58seal quality is genuinely right. It's $8.09, which makes it the most expensive on this list,
02:04but on a turbo Audi, holding proper system pressure isn't optional, it's how you keep
02:09your coolant from boiling. Cheap Insurance
02:13Coming in at number 4 is the Coolant Recovery Bottle Cap for Dodge Journey and Jeep Cherokee,
02:17part number 55056382AA if you want to cross-reference it, which I always recommend doing.
02:24These Chrysler caps get brittle from heat cycling and you'll notice the tabs start to feel loose when
02:29you twist it on. $4.26, 4,300 sold, 4.9 stars. Take the old one off, look at the
02:37rubber seal,
02:38and if it's flattened or cracked, you already have your answer. And rounding it out, the cheapest one
02:44here, the radiator expansion tank cap for Suzuki. Fits the Swift from 2005 to 2010, the Splash,
02:51the Vitara 2016 S-Cross, and the Grand Vitara from 2007 to 2015. $3.50. A perfect 5-star rating
03:02with
03:02over 4,000 sold. Suzuki owners know parts can be a pain to source locally, so having a direct fit
03:08cap
03:08this cheap and this well-reviewed is a genuinely good find. 2-minute install, no tools needed.
03:15All 5 links are sitting in the description below, so grab whichever one matches your car.
03:21If this saved you a headache or a tow truck, hit that like button and subscribe I'm putting out
03:25cheap parts that actually work every single week. Thanks for watching, and I'll catch you in the next one.
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