Chery Tiggo Radiator Cap (Part No.: T11-BJ130111)
First off, let’s clear one thing up: the Chery Tiggo Radiator Cap T11-BJ130111 isn’t just some “plastic lid” for your radiator—it’s the little but super important “pressure controller” for your Tiggo’s cooling system. Think of it like a gatekeeper that stops your engine from overheating: it seals the radiator tight to keep a specific pressure (usually 10–15 psi) inside the cooling system. Why does that pressure even matter? Because more pressure raises the boiling point of your coolant—from 100°C up to around 120°C. That way, it won’t boil over and make a mess even when your engine’s working hard, like when you’re climbing hills or sitting in traffic on a hot day. If this radiator cap isn’t working right, your coolant will boil way too early, your engine will overheat fast, and you could end up with expensive damage—think a warped cylinder head. This radiator cap only fits Chery Tiggo models on the T11 platform—mostly the early Tiggo 3 models (2005–2012; make sure to double-check your car’s VIN or owner’s manual to confirm!). It’s designed to fit the T11 radiator’s filler neck perfectly: the inner seal matches the neck’s diameter exactly, and the pressure valve is tuned to Chery’s specs—so it lets out extra pressure at just the right time.
Go for a generic radiator cap instead? You’ll run into all sorts of trouble: it won’t seal properly (so coolant leaks out), the pressure setting is wrong (coolant boils too soon or pressure gets way too high), or it falls apart after a few months—putting your engine at risk of overheating.
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This T11-BJ130111 radiator cap only works with T11-platform Chery Tiggos—using the wrong one is a quick way to overheat your engine. Here’s the deal:
Fits These Models: Chery Tiggo 3 (T11 platform) 2005–2012. Works with all T11 radiator types (since they share the same filler neck size and pressure requirements).
Won’t Fit These:
Newer Chery Tiggo models (e.g., Tiggo 5, Tiggo 7): These have larger radiators with different filler neck sizes and higher pressure specs (15–18 psi)—this cap will be too small and won’t hold pressure.
Other Chery models (e.g., QQ, A3): Their radiators are smaller, and the filler necks are shaped differently—this cap won’t seal, and the pressure setting is wrong.
Non-Chery vehicles: Even if it “looks the same,” the neck size and pressure valve specs are off—it won’t fit, plain and simple.
System Compatibility: Must be used with Chery’s recommended coolant (usually ethylene glycol-based, 50/50 mix with water). The cap’s rubber seal is designed to work with this coolant—using cheap or wrong coolant can break down the seal and cause leaks.
This is one of the easiest parts to replace on your Tiggo—just follow these steps (and always wait for the engine to cool down first! Hot coolant sprays and can burn you):
Cool the engine: Turn off your Tiggo and wait 1–2 hours until the engine is completely cool (the temperature gauge should be at 0).
Remove the old cap: Twist the old cap counterclockwise slowly—if you hear a hissing sound, stop and wait (that means pressure is still inside; let it release fully before removing). Once it’s loose, lift it off.
Check the seal: Before installing the new cap, look at the old cap’s rubber seal—if it’s cracked, hard, or has coolant residue, that’s why it failed (the new cap’s seal will fix that!).
Install the new cap: Place the T11-BJ130111 cap on the radiator neck and twist it clockwise until it clicks (usually 1–2 full turns). Make sure it’s tight—if it wiggles, it’s not sealed right.
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Summary
The original T11-BJ130111 actually passes tests for handling the T11’s engine heat—it stays nice and sealed for years, and keeps your cooling system running just like it’s supposed to. It’s just a $20 part, but it saves you from dropping $1,000 or more on engine fixes.
Bottom line, the Chery Tiggo Radiator Cap T11-BJ130111 is your engine’s “overheat protector.” It’s small, super easy to swap out, and keeps your Tiggo running cool—even on the hottest days. Stick with the original part, check it every now and then, and you’ll never have to stress about your engine overheating
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