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Old 10-20-2012, 03:10 PM   #1 (permalink)
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BZP T-100 (2010) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
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Question Changing out my cooling fan...

The Toyota T-100 3.0L engines had a different cooling fan than the Toyota T-100 3.4L engines. Basically the 3.0L engines had a cooling fan with an aerodynamic ring around it vs the 3.4L engines did not.

I was wondering if there is any significant impact by changing from one to the other...

Original 3.4L fan...


Original 3.0L fan...


Installed...

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Old 10-20-2012, 10:46 PM   #2 (permalink)
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BZP T-100 (2010) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
Last 3: 24 mpg (US)

BZP T-100 (2011) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
Last 3: 23.66 mpg (US)

BZP T-100 (2009) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
Last 3: 19.01 mpg (US)

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Last 3: 25.45 mpg (US)

BZP T-100 (2013) - '98 Toyota T-100 SR5
Last 3: 25.79 mpg (US)

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Last 3: 23.18 mpg (US)

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Last 3: 23.85 mpg (US)

BZP T-100 (2016) - '98 Toyota T-100 SR5
Last 3: 17.62 mpg (US)

BZP T-100 (2017) - '98 Toyota T-100 SR5
90 day: 20.78 mpg (US)

BZP T-100 (2018) - '98 Toyota T-100 SR5
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A quick drive tonight and it seemed like it was much quieter under the hood...
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Old 10-21-2012, 06:46 AM   #3 (permalink)
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I was going to say that the addition of the ring may have been primarily for sound; aesthetic.

What difference in diameter and blade pitch would be the other questions.

And, how is the "fit" different? The open blade type wants to be "in" the shrouding around half the width the blade or more. Plus a clearance of 1/2" or so from blade end to shroud.

These small differences can add up in cooling efficiency. An oversized radiator -- by comparison -- is needed if airflow is compromised.

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Old 10-21-2012, 12:13 PM   #4 (permalink)
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Join Date: Apr 2008
Location: The Woodlands, TX
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BZP T-100 (2010) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
Last 3: 24 mpg (US)

BZP T-100 (2011) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
Last 3: 23.66 mpg (US)

BZP T-100 (2009) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
Last 3: 19.01 mpg (US)

BZP T-100 (2012) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
Last 3: 25.45 mpg (US)

BZP T-100 (2013) - '98 Toyota T-100 SR5
Last 3: 25.79 mpg (US)

BZP T-100 (2014) - '98 Toyota T-100 SR5
Last 3: 23.18 mpg (US)

BZP T-100 (2015) - '98 Toyota T-100 SR5
Last 3: 23.85 mpg (US)

BZP T-100 (2016) - '98 Toyota T-100 SR5
Last 3: 17.62 mpg (US)

BZP T-100 (2017) - '98 Toyota T-100 SR5
90 day: 20.78 mpg (US)

BZP T-100 (2018) - '98 Toyota T-100 SR5
90 day: 20.19 mpg (US)

BZP T-100 current (2019) - '98 Toyota T-100 SR5

BZP T-100 (2020) - '98 Toyota T-100 SR5
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Wink

Quote:
Originally Posted by slowmover View Post
I was going to say that the addition of the ring may have been primarily for sound; aesthetic.

What difference in diameter and blade pitch would be the other questions.

And, how is the "fit" different? The open blade type wants to be "in" the shrouding around half the width the blade or more. Plus a clearance of 1/2" or so from blade end to shroud.

These small differences can add up in cooling efficiency. An oversized radiator -- by comparison -- is needed if airflow is compromised.

.
Not sure on the blade pitch difference between the two as I didn't measure it.

Overall diameter seems to be the same but the blade area seems to be slightly smaller with the 3.0L fan than the 3.4L fan...but I didn't measure it before I tried to install it.

Depth into the fan shroud seems to be the same...but again I really didn't measure it.

The radiator is the exact same radiator fer either the 2.7L, 3.0L, or 3.4L T-100 trucks. Only the radiator shroud is slightly different between the 3.0L and 2.7L/3.4L engine sizes. I did not swap out the radiator shroud.

Not sure if my grill block(s) will affect the efficiency of the fan airflow or not. I do have auxiliary temp sensors to monitor under the hood temps and ambient air temps as well as my Ultragauge monitoring my coolant temps.
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Old 10-23-2012, 01:12 AM   #5 (permalink)
T-100 Road Warrior
 
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Join Date: Apr 2008
Location: The Woodlands, TX
Posts: 1,902

BZP T-100 (2010) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
Last 3: 24 mpg (US)

BZP T-100 (2011) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
Last 3: 23.66 mpg (US)

BZP T-100 (2009) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
Last 3: 19.01 mpg (US)

BZP T-100 (2012) - '98 Toyota T-100 ext cab - 3.4L/auto SR5
Last 3: 25.45 mpg (US)

BZP T-100 (2013) - '98 Toyota T-100 SR5
Last 3: 25.79 mpg (US)

BZP T-100 (2014) - '98 Toyota T-100 SR5
Last 3: 23.18 mpg (US)

BZP T-100 (2015) - '98 Toyota T-100 SR5
Last 3: 23.85 mpg (US)

BZP T-100 (2016) - '98 Toyota T-100 SR5
Last 3: 17.62 mpg (US)

BZP T-100 (2017) - '98 Toyota T-100 SR5
90 day: 20.78 mpg (US)

BZP T-100 (2018) - '98 Toyota T-100 SR5
90 day: 20.19 mpg (US)

BZP T-100 current (2019) - '98 Toyota T-100 SR5

BZP T-100 (2020) - '98 Toyota T-100 SR5
Thanks: 3,437
Thanked 1,366 Times in 950 Posts
Send a message via ICQ to BamZipPow
Wanna hear something funny? TRD is selling the same fan in their current catalog fer the 4.5L supercharger setup...

http://www.toyotaracing.com/trd/cata...RD_Catalog.pdf

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