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Meanman Samba Member
Joined: November 17, 2013 Posts: 11 Location: Maple Ridge,BC,Canada
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Posted: Fri Jul 27, 2018 7:16 am Post subject: Auxiliary 12v cooling fan |
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Has anyone ever installed an auxiliary engine cooling fan?
My notch is now running a 1968cc and after a long hard run in summer heat, after I shut it down and let it heat soak for a bit, on next start up and run it really suffers from poor acceleration from a stop. Will do this for a host bit until it’s been run for a bit at speed.
What I’d like to do is add a 12v auxiliary cooling fan to be able to run for a bit to assist in getting under hood temps down/ Engine cool down.
Anyone ever attempt this? |
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W1K1 Samba Member
Joined: March 04, 2004 Posts: 4897 Location: Southern AB
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bustercat Samba Member
Joined: May 25, 2015 Posts: 17 Location: north vancouver Canada
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Posted: Fri Jul 27, 2018 9:40 am Post subject: Re: Auxiliary 12v cooling fan |
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I have wondered about this too. Heat soak seems a universal problem to some degree with a lot of these cars, especially in the hot weather. Would a timer controlled fan in the engine compartment help by moving air at shutdown? I was thinking of a marine bilge blower type setup. They can move a lot of air. |
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Meanman Samba Member
Joined: November 17, 2013 Posts: 11 Location: Maple Ridge,BC,Canada
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Posted: Fri Jul 27, 2018 11:02 pm Post subject: Re: Auxiliary 12v cooling fan |
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Bustercat.....exactly my train of thought. I work in Marine industry and a bilge fan was my first thought. The trick is to find a way to due it that is not only functional but also looks like it belongs, or adds to the looks. I spent a fair bit of time when I rebuilt my engine having cases vapour blasted and tins replacer coated. I don’t want to ruin an otherwise clean bay with shite. |
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Geothon Samba Member
Joined: May 16, 2008 Posts: 153 Location: Ventura, CA
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Posted: Fri Aug 17, 2018 3:36 pm Post subject: Re: Auxiliary 12v cooling fan |
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Heater blower motor out of Type 4 bus will not look out of place. I actually had it installed into the Squareback engine bay hooked up to the heat exchangers. May be possible to flange the outlets into the tin.
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Vintagerazor Samba Member
Joined: September 26, 2007 Posts: 2 Location: Bangkok, Thailand
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Posted: Mon Oct 22, 2018 5:08 am Post subject: Re: Auxiliary 12v cooling fan |
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Came across this the other day. Picture isn’t mine. I have a T34 with an external oil cooler mounted above the trannsmission on the left side. I have similar problems starting from hot. So I have to wonder where cool air is being fed to the oilcooler/engine bay.
This solution is a rather crude but I would like to think it serves the purpose of feeding additional cool air into the bay? Thoughts?
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Multi69s Samba Member
Joined: January 24, 2006 Posts: 5360 Location: Lefty, CA
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Posted: Wed Oct 24, 2018 3:04 am Post subject: Re: Auxiliary 12v cooling fan |
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I will open up a can of worms again. However, when you look at the posts relating to difficult hot starts, the common thread is that most of them have big engines. Yet where are we pulling our intake air from, the multiple hundreds degrees engine compartment. Does heat soak have an affect, of course. If we were to bring in cool intake air, it would help with hot starting and heat soak. One thing I know for an absolute fact, is that an hot engine wants a leaner mixture at startup, then a cold one. I just don't work on VWs, but I have an over abundance of other toys (i have 6 dirt bikes as an example). On semi modern. Four stroke dirt bikes, ( before they became computer controlled) they had a hot start button that actually leaned out the mixture when hot so they could start them. In fact on my T4 powered Squareback, when hot and I touch the throttle, it's cranking time. If I don't touch it, it's a pretty easy start. Medical and work issues have stalled me for now, but I will get to it and share my findings with you. The only problem is I can't test my theories until next summer. _________________ 69 road Bug 2110
73 Squareback - 2L, T4, Automatic W/ AC
Gone, but many fond memories 69 Baja Bug 2010 - 5 Rib Bus Transaxle
Gone but not forgotten 72 Baja Bug 2010
My builds
T4 into Squareback http://www.thesamba.com/vw/forum/viewtopic.php?t=458944&highlight=
Auto Trans Rebuild http://www.thesamba.com/vw/forum/viewtopic.php?t=516066&highlight=
AC in Squareback https://www.thesamba.com/vw/forum/viewtopic.php?t=...highlight= |
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Bobnotch Samba Member
Joined: July 06, 2003 Posts: 22358 Location: Kimball, Mi
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Posted: Wed Oct 24, 2018 12:35 pm Post subject: Re: Auxiliary 12v cooling fan |
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Multi69s wrote: |
I will open up a can of worms again. However, when you look at the posts relating to difficult hot starts, the common thread is that most of them have big engines. Yet where are we pulling our intake air from, the multiple hundreds degrees engine compartment. Does heat soak have an affect, of course. If we were to bring in cool intake air, it would help with hot starting and heat soak. One thing I know for an absolute fact, is that an hot engine wants a leaner mixture at startup, then a cold one. I just don't work on VWs, but I have an over abundance of other toys (i have 6 dirt bikes as an example). On semi modern. Four stroke dirt bikes, ( before they became computer controlled) they had a hot start button that actually leaned out the mixture when hot so they could start them. In fact on my T4 powered Squareback, when hot and I touch the throttle, it's cranking time. If I don't touch it, it's a pretty easy start. Medical and work issues have stalled me for now, but I will get to it and share my findings with you. The only problem is I can't test my theories until next summer. |
Yup, my 65 Notch with dual carbs and a 1600 are exactly like that. When fully warmed, don't touch the gas, only the key. When cold, step on the pedal twice first. That all aluminum case holds heat once fully warmed up.
My son is finally figuring this out with his 1.7 T-4 powered car. Once warmed, leave the pedal alone. _________________ Bob 65 Notch S with Sunroof
71 Notch ...aka Krunchy; build pics here;
http://www.thesamba.com/vw/forum/viewtopic.php?t=249390 -been busy working
64 T-34 Ghia...aka Wolfie, under construction... http://www.thesamba.com/vw/forum/viewtopic.php?t=412120
Tram wrote: |
"Friends are God's way of apologizing for relatives." |
Tram wrote: |
People keep confusing "restored" and "restroyed". |
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