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Charge Cooler Cap replacement

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Muddy Water

Post subject: Charge Cooler Cap replacement

Posted: Wed Oct 15, 2008 8:32 pm

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Location: Another Shire County
Car Model: ST185

Is it possible to uprate the charge cooler cap?
If so, is it a type 'S' or 'N' fitting?
Is it something worth doing?

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Diceman

Post subject:

Posted: Wed Oct 15, 2008 8:43 pm

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IMHO it is just bling.
IIRC they run a 0.7 or 0.8 bar rad cap as standard. The water should not get to temp sufficient to generate that kind of pressure IMHO or else you have an interwarmer and not an intercooler!

I have never found the chargecooler fluid to become hotter than "Tepid" when dunking a finger in it.

I must admit to finding it quite warm once but teh chargecooler pump had failed.

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Muddy Water

Post subject: Bling

Posted: Wed Oct 15, 2008 8:48 pm

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Location: Another Shire County
Car Model: ST185

Thanks for that JP.
Was looking at one of those TRD 1.3/1.5bar caps for the rad and was thinking about getting another one for the charger cooler to match :oops:

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Diceman

Post subject:

Posted: Wed Oct 15, 2008 8:56 pm

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erghh - yes I bought one many years back :-(

Mainly so that they matched.
I also bought some silly TRD aluminium oil filler cap and all kinds of junk.

TBH it depends on what you want it for m8. Bling has it's place.

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Muddy Water

Post subject:

Posted: Wed Oct 15, 2008 9:16 pm

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Joined: Mon Mar 26, 2007 5:53 pm
Posts: 1736
Location: Another Shire County
Car Model: ST185

I've been rumbled :oops:

Just looking at dressing up the 205 a little bit but was looking at practicality as well as bling.
I also like to keep to a theme.

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TrackToyFour

Post subject:

Posted: Thu Oct 16, 2008 12:34 am

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Joined: Wed Jul 13, 2005 12:06 am
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Location: Perth, Western Australia
Car Model: ST205

Quite right Nigel, style is important. The last thing you want is for your engine bay to be spoilt by a poxy standard spec I/C cap

We need to keep an eye on JP to ensure he's not letting the side down :lol:

FWIW the Koyo ally rad for the ST205 uses the same size cap as the top mount I/C tank.

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Muddy Water

Post subject: Cap Rating

Posted: Thu Oct 16, 2008 1:35 pm

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Joined: Mon Mar 26, 2007 5:53 pm
Posts: 1736
Location: Another Shire County
Car Model: ST185

OK.
Just been out to the car and had a look under the bonnet.
Both caps are rated at 0.9 bar.
However, the fitting is subtly different, that is, they are not inter-changeable.
The rad cap is a type S (so I'm led to believe).
The charge cooler cap is slightly larger and deeper.
Umm! Going to hunt around the net and see if I can get more info.

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TrackToyFour

Post subject:

Posted: Thu Oct 16, 2008 2:54 pm

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Joined: Wed Jul 13, 2005 12:06 am
Posts: 4743
Location: Perth, Western Australia
Car Model: ST205

Fensport stock the 1.5bar TRD charge cooler/Koyo ally rad caps. The one you want is the Type S, TRD Part No. 16401-SP020 described on the pack as TRD Radiator Cap. All the other writing on the pack is in Japanese.

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Muddy Water

Post subject:

Posted: Thu Oct 16, 2008 9:04 pm

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Joined: Mon Mar 26, 2007 5:53 pm
Posts: 1736
Location: Another Shire County
Car Model: ST185

I'm confused

TRD Japan http://trdparts.jp/english/list_st-celica.html quote - TRD Radiator Cap: 16401-SP030

NENGUN http://www.nengun.com/trd/radiator-cap quote - TRD Radiator Cap:
16401-SP002 S Type - Relief pressure 127kPa(1.3kgf/cm2)
16401-SP020 S Type - Relief pressure 147kPa(1.5kgf/cm2)
16401-SP030 Type N - Relief pressure 127kPa(1.3kgf/cm2)

So which one would I want for the radiator and which one for the charge cooler :?:

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TrackToyFour

Post subject:

Posted: Thu Oct 16, 2008 9:18 pm

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Joined: Wed Jul 13, 2005 12:06 am
Posts: 4743
Location: Perth, Western Australia
Car Model: ST205

I'm confused why you are confused......

For the ST205 top mount charge cooler tank you need the Type S, TRD Part No. 16401-SP020. Its still called a radiator cap on the TRD packaging.

The same cap will also fit the aftermarket aluminium Koyo R1958 engine radiator for the ST205. This uses a different size radiator neck to the OEM radiator. i.e. you can't use an OEM rad cap on an aluminium Koyo rad.

If that's still not clear give me a bell m8 :cry:

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Muddy Water

Post subject:

Posted: Thu Oct 16, 2008 9:26 pm

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Joined: Mon Mar 26, 2007 5:53 pm
Posts: 1736
Location: Another Shire County
Car Model: ST185

Clear as Mud(dy Water) :roll:

So, if I understand correctly....
TRD Radiator Cap: 16401-SP020 S Type - Relief pressure 147kPa(1.5kgf/cm2) fits both the Charge Cooler and the Koyo Rad.

So can I assume that TRD Radiator Cap: 16401-SP030 fits the standard rad :?:

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TrackToyFour

Post subject:

Posted: Thu Oct 16, 2008 9:33 pm

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Joined: Wed Jul 13, 2005 12:06 am
Posts: 4743
Location: Perth, Western Australia
Car Model: ST205

Muddy Water wrote:

So can I assume that TRD Radiator Cap: 16401-SP030 fits the standard rad :?:

Yep, I'm pretty sure that's the case. I have three TRD rad caps buried in the back of the garage or loft. They were incorrectly sent by Fensport. I did try and dig them out this afternoon to check on the part number but they've gone walkabout

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Diceman

Post subject:

Posted: Thu Oct 16, 2008 9:35 pm

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http://tinyurl.com/4fk6d

Chargecooler is S type
OEM Rad cap is N type

Enjoy the music :-)

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Muddy Water

Post subject:

Posted: Thu Oct 16, 2008 9:39 pm

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Joined: Mon Mar 26, 2007 5:53 pm
Posts: 1736
Location: Another Shire County
Car Model: ST185

Very good

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TrackToyFour

Post subject:

Posted: Thu Oct 16, 2008 10:55 pm

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Joined: Wed Jul 13, 2005 12:06 am
Posts: 4743
Location: Perth, Western Australia
Car Model: ST205

N.B. I've edited JP's post for clarity

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