Mishimoto aluminum radiotor cap pressure (1 Viewer)

[ibis1969]

Hi All-
I've had recurring problems with a leaking cooling system. While it easily could be a simple clamp/hose issue, does any one know what the correct pressure rating should for the radiator cap? I have a Mishimoto aluminum radiator with a 1.3 Bar cap. While Mishi doesn't make an less pressure cap, is 1.3 Bar too high?

Thanks in advance,
-ibis1969

 

[2mbb]

This is from the FSM. They do a pressure test at 21 psi (1.45 Bar). And they test the relief valve on the cap to be between 10.7 and 14.9 psi (0.74 to 1.03 bar). If the pressure on the cap you have is for the relief valve, then it does seem a little bit high.

You might be able to rent or borrow the pressure test equipment from an autoparts store. This is a good way to check where you might be leaking then address the leak with new hoses and/or tighter clamp.

 

[vipergrhd]

Will a different cap fit the radiator? I think 1.3 bar is about 18 psi which is a bit up there.

 

[ToyotaMatt]

a genuine NipponDenso correct cap has 0.9 stamped on it


ALL Toyota vehicles use the 0.9 rating

​

 

[ibis1969]

Hi ToyotaMatt-
That is very helpful. Do you know if the 0.9 rating on the Denzo radiator cap means 0.9 BAR?

I've checked and the cap dimensions for the Mishimoto cap are smaller than the Denso cap size.

This could be an issue.

Thanks,
-ibis1969

 

[ToyotaMatt]

Hi ToyotaMatt-
That is very helpful. Do you know if the 0.9 rating on the Denzo radiator cap means 0.9 BAR?

I've checked and the cap dimensions for the Mishimoto cap are smaller than the Denso cap size.

This could be an issue.

Thanks,
-ibis1969

the size spec diagram i made a while back for Tutorial use here on MUD , is of the Pre-4/86 BIG CAP Only to be klear

i guess i should now make a SMALL CAP 4/86-Present Day size spec. diagram too now ..........


odd thing is CSF , the BEST aftermarket Radiator in my opinion , was all small caps till a few years ago , NOW are big caps much of the time , i hope they realized that

the BIG cap size spec. was needed for ANY 2F and Earlier F1.5 etc engine?

or was it simply customer demand for the timeless and period correct traditional Retainer Chains Laden BIG caps to return ?

hopefully both !



the entire 0.9 topic is based on the Pressure Release feature hands down , as i understand it to be , i would NEVER install a CHEEZY Aftermarket ROCK AUTO China crap cap on ANY toyota i owned for sure


i have seen the damage i higher pressure rated one or a stuck shut SH#T one like moto-rad can cause on a sensitive Toyota cooling system during my tenure at the dealer ship level


all i can say for a FACT , and this is fact based in detail , NO TOYOTA i have ever seen comes with a cap other then a 0.9 and ALL Toyota OEM caps are stamped 0.9


but there's DANGER OUT there on the perimeter where there are NO stars at night , placers like EBAY , AMAZON , and the sketchy like !


100% SOLID Counterfeit DENSO and NipponDenso Radiator Caps , and also TRD ones too ,


so everyone beware , purchase form a trusted and known Source 100% of the time ,


- now there's a fair and balanced flip side to this too i must mention , in FULL Transparent and open forum support of my favorite TOYOTA OEM parts maker

DENSO , / NipponDenso .........


DENSO , recently like 1 year ago fully shifted the majority of its GLOBAL operations and manufacturing to Jakarta Indonesia , there NEW WORLD head quarters is

NO longer in JAPAN , only a small chunk of what was something Special



so , what im trying to say is ; If you see a MADE IN INDONESIA NipponDenso / DENSO oem part , it most likely is legit , but remain vigilant of course here too


DENSO made in CHINA parts are full on counterfeits most of the time but NOT always , DENSO does indeed have operations in CHINA and lots of south east ASIA


below is a tech MAP to help you distinguish DENSO manufacturing locations globally , even here in the USA


im a DENSO Authorized distributor of a few small nicht products i carry , but that's a super hard door and glass ceiling to get you foot in the door of a ever growing


exclusive FRAT HOUSE club if you follow me here ?


- Below DENSO GLOBAL map

then BELOW MAP is a live real time LINKS of 100% counterfeit DENSO products i can say 100% solid are just that like cooling system parts Radiator caps IN particular

-------------------------------------------------------------------------------------------------------------------------------------------------





100% COUNTERFIET DENSO NipponDenso Radiator caps



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Buy CHERISH-AUTO 1PCS OEM 16401-28430 1640128430 Radiator cap Compatible with ACV30/ACV40/ACR30/UCF30/GSV40: Standard - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

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Radiator Cap Land Cruiser Lexus Honda Isuzu Mazda Denso Genuine Japan 108k Pa | eBay

OEM GENUINE Radiator Cap 108k Pa for Land Cruiser Lexus Honda Isuzu Mazda Denso Genuine Made in Japan 108k Pa Specificaction 1.1kg/cm 108kpa (spring) 1.1 Spececially desing for Toyota Land Cruiser 1998-2007 Lexus LX 470 1998-2007 Honda Accord 1990-1993 Honda Prelude 1992-1996 isuzu N75 2066 -...

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RADIATOR CAP TOYOTA CAMRY COROLLA CRESIDA CELICA MR2 SUPPRA 4RUNNER TERCEL OEM | eBay

OEM GENUINE DENSO TOYOTA RADIATOR CAP (FOR WATER OUTLET) Specially desing by Denso / Toyota for the following models: 1984-1995 Toyota 4Runner ,1983-1991 Toyota Camry , 1982-1989 Toyota Celica , 1982-1993 Toyota Corolla , 1985-1992 Toyota Cressida , 1985-1995 Toyota MR2 1984-1995 Toyota Pickup ...

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For Honda Acura 19045-P08-014 NEW Radiator High Pressure Denso Cap 19045-PAA-A01 | eBay

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[ibis1969]

So, it appears that Radium Engineering makes a few different BAR rated small radiator caps that fit the Mishimoto aluminum radiator for FJ60 2F's. The link is here: Radiator Caps - http://www.radiumauto.com/Radiator-Caps-P726.aspx

The lowest BAR Radium makes is 1.1 BAR which equals 16.0 psi. It's not the 0.9 BAR/13.1 psi that the OEM Denso cap appears to be rated. But 1.1 BAR/16.0 psi is 13.3% better than the 1.3 BAR/18.9 psi that the lowest rated small cap Mishimoto, so it's better than nothing.

Will post to this thread as I experience the results of the lower rated cap. I just installed it today on my FJ60. I have been experiencing slight water leaks over time as the Charleston, SC weather in August exerts its influence on my motor.

-ibis1969

 

[Retro LC]

odd thing is CSF , the BEST aftermarket Radiator in my opinion , was all small caps till a few years ago , NOW are big caps much of the time , i hope they realized that

the entire 0.9 topic is based on the Pressure Release feature hands down , as i understand it to be , i would NEVER install a CHEEZY Aftermarket ROCK AUTO China crap cap on ANY toyota i owned for sure

i have seen the damage i higher pressure rated one or a stuck shut SH#T one like moto-rad can cause on a sensitive Toyota cooling system during my tenure at the dealer ship level

all i can say for a FACT , and this is fact based in detail , NO TOYOTA i have ever seen comes with a cap other then a 0.9 and ALL Toyota OEM caps are stamped 0.9

Hey TM, so the Motorad radiator cap is really that inferior to the OEM Toyota radiator cap (even though the Motorad is stamped 0.9 bar it may not always release pressure at 0.9 bar)? Oh boy if so--better get that puppy off my radiator asap. Do you know if the Toyota part# 1640154750 radiator cap will fit the CSF 2709 radiator on my FJ80 3FE?

 

[ToyotaMatt]

Hey TM, so the Motorad radiator cap is really that inferior to the OEM Toyota radiator cap (even though the Motorad is stamped 0.9 bar it may not always release pressure at 0.9 bar)? Oh boy if so--better get that puppy off my radiator asap. Do you know if the Toyota part# 1640154750 radiator cap will fit the CSF 2709 radiator on my FJ80 3FE?

hello mr. retro ....


it kinda is exactly like this :

motorad brand caps are your fancy-shmancy-grade of Chinese-Made Chairman MO at ROCK AUTO that u can BUY IT NOW ....


- is it actually possible that radiator cap that retails for $2.56 , and lets just say costs 1/2 that to produce could be as good and safe for your land cruiser the a Genuine NipponDenso Japan one
that cost the same as a your favorite 18pack on Friday night ?