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5th gen:Denso vs Toyo radiator; how to tell

 
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Old 11-15-2014, 11:39 AM
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5th gen:Denso vs Toyo radiator; how to tell

The 5th gen Prelude had either a Toyo or a Denso radiator.
The Base had a style of each brand without a cooling line provision. The SH shared the same radiators as the base auto as both had cooling lines.

But do you have a Denso or a Toyo? Hard to tell at first glance. You need a new cap and the guy behind the parts counter is asking you which one your car has.

I found the cap is the best indicator. Much easier to spot if you still have the oem type.


^^ left is the Toyo. Right is a Denso

But somebody replaced yours with a Stant or some other kind. Subtle differences matter.


^^the Toyo opening is a little larger. Hence bigger plug.


^^ remember this picture.
You can see how the plug differs. When you remove the cap from a Denso you may ask yourself just how in the heck is coolant supposed to (neatly) fit in that little bitty hole.

I did not know which one I had so I bought both caps to know.


^^ my cap is no longer functioning.
Spring is broken.

If you are going to buy an aftermarket at your favorite parts store take your old cap with you to ensure they give you the correct one. If you've lost your cap remember the Toyo has a plug about the size of a bottle cap and the Denso has that little bitty looking plug that seemingly inserts further into the opening





^^ the Denso opening.



^^ left aftermarket. right an old Denso type.


^^ left the aftermarket plug works on either.
It has a plug up against the cap so it can fit in the Denso but larger diameter to work in the Toyo.
Right the Denso has a smaller plug that extends into the filler hole.

The Toyo look. This is in a 93 engine bay.


^^ the cap


^^ at a glance the difference is obvious...
If you know to look for the differing type.


^^ toyo clearly marks their radiators.
Also note the embossed 'Honda' to the far right.

Edit:
Speaking of oem. My son has an aftermarket Denso type replacement radiator. The oem one has a little flat spot on the (US) driver side near the mount like some sticker belongs there. Honda does not show a sticker in the parts diagram though.

^^ after market with photo-shop-ed aprox location of flat spot.


^^ w/o said flat spot.

Note:
The Toyo uses Mitsuba fan, Toyo shroud etc. Denso uses Denso parts.
If anyone knows the differences of those, please share as it could be a Denso system or a Toyo system might matter when installing a dual core radiator based on their dimensions. One may fit and the other not.
When you are replacing your oem with oem type that info also matters.
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Old 11-15-2014, 11:50 AM
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Re: 5th gen:Denso vs Toyo radiator; how to tell

Nice info, thanks!
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Old 08-08-2015, 06:37 AM
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Re: 5th gen:Denso vs Toyo radiator; how to tell

Through some minor digging through Honda Tech, i've learned Denso fans have 5 blades, while Toyos have 4. They also have different shrouds and mount at different points on the radiator.

I broke my radiator trying to replace the upper hose, and almost bought a Denso, not realizing i have a Toyo.
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Old 08-08-2015, 08:39 AM
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Re: 5th gen:Denso vs Toyo radiator; how to tell

^^ nice to know.
Thanks for adding the info.
Glad you didn't get the wrong part(s)
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Originally Posted by ogsmakdade View Post
welcome to site Carl
...is a golden car fax kinda like a golden ticket? Sure hope willy wonka didn't put any snozberries in your motor.
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Originally Posted by elspectro29 View Post
Only seen the first one, 15 years ago in theaters. Plan on keeping it that way. Get off my lawn.
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Originally Posted by Lindso View Post
I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

God's Not Dead
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