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12-13-2006, 01:43 AM | #1 |
Drives: 2007 Toyota Yaris Join Date: Dec 2006
Location: Frederick, Maryland. USA
Posts: 9
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Radiator Cap for HB
I was trying to find out if my TRD Radiator cap 21.3 PSI part #00642-16401-002 will work on my 07 yaris HB... I tried to google for the TRD tech sheets but couldn't find anything...I did find that at the trdsource.com the only radiator cap listed for the 07 yaris HB is the 18.5 PSI part #00642-16401-003.
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12-13-2006, 10:00 AM | #2 |
Honestly why use a TRD radiator cap? What does it do? Is it really a performance Mod?
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12-13-2006, 10:05 AM | #3 |
Drives: Absolutely Red Liftback Join Date: Aug 2006
Location: San Diego, CA
Posts: 570
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12-23-2006, 01:00 AM | #4 |
Drives: 2005 Scion xB Join Date: Nov 2006
Location: The Black Hills of South Dakota
Posts: 1,059
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12-23-2006, 02:54 AM | #5 |
vroom vroom
Drives: lil red 5-door Join Date: Sep 2006
Location: Bangkok, Thailand
Posts: 7,744
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Dude don't forget a NOS sticker and some stripes too!
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12-23-2006, 04:46 PM | #6 |
Drives: 2007 Toyota Yaris Join Date: Dec 2006
Location: Frederick, Maryland. USA
Posts: 9
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I never said or thought it would give me a performance boost. It's more of a cosmetic mod.
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12-14-2006, 10:59 PM | #7 |
Drives: 07 Meteorite Metallic Yaris LB Join Date: Jul 2006
Location: USA
Posts: 441
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"Performance" Radiator caps actually do put the radiator under a higher pressure, allowing for the coolant to do it's job more efficiently and allow the engine to run a bit cooler, depending on other mods, this can make a difference, but only if you're trying to squeeze as much as you possibly can out, and they're what... like 20-30 bucks?
Now for the original question, the TRD Japan part number for the radiator cap that fits the Vitz is P/N:16401-SP030 which is the same as the TRD US part number that you listed second, this is the one that most Toyotas and Lexuses use, the part number for the one you have is TRD JP P/N: 16401-SP002 which is used in some V6 and V8 Toyotas and Lexuses, you need the 18.5psi cap. |
12-22-2006, 11:12 PM | #8 | ||
Drives: 2007 Toyota Yaris Join Date: Dec 2006
Location: Frederick, Maryland. USA
Posts: 9
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Quote:
Quote:
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12-23-2006, 12:56 AM | #9 |
Drives: 2005 Scion xB Join Date: Nov 2006
Location: The Black Hills of South Dakota
Posts: 1,059
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It's a terrible mod if you ask me and has no performance value. Higher pressure radiator caps DO NOT lower your coolant temperatures. It's just the opposite in fact; they prevent the coolant from boiling at higher temps. Chemically speaking it's called boiling point elevation. More pressure=higher boiling point. Allowing more pressure to build up can in no way lower the temp of your engine. At most all they can do is prevent your car from boiling over under extremly hard driving. It is however a great way to pop off those spring-like radiator hose clamps, or worse yet blow a radiator hose.
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12-15-2006, 03:23 PM | #10 |
Drives: LB-Auto-PWR-ABS-Cruise-Springs Join Date: Aug 2006
Location: Richmond, VA
Posts: 1,065
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""Performance" Radiator caps"
That's a good one.
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Other car is a 2005 Mustang Convertible 4.0L V6 Manual - Legend Lime Get YarAss in gear! RIP - Casey Tatum |
12-15-2006, 08:41 PM | #11 |
Drives: 07 Meteorite Metallic Yaris LB Join Date: Jul 2006
Location: USA
Posts: 441
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yeah... notice I put performance in quotes... hey, that's what these people call them.
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12-15-2006, 08:44 PM | #12 |
der Zeck
Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006
Location: Toledo, OH
Posts: 5,231
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why not just get the TRD radiator cap sticker off ebay?
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12-15-2006, 08:48 PM | #13 |
Drives: 07 Meteorite Metallic Yaris LB Join Date: Jul 2006
Location: USA
Posts: 441
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the point of the cap... and the TRD, GReddy, Tom's, and generic all do the same thing, is a higher pressure than the stock cap, that's why I always buy the 5 dollar generic at the local ricer shop, same 18.5psi rating as the 30 dollar TRD cap. I don't buy mine for looks, I buy mine for the increased coolant pressure.
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