How to MarkVIII your OBS on a budget..!

[monstar_est87]

So this is how I setup my Efan... Consists of a MarkVIII efan, 96volvo duel speed fan relay and a 96 BMW temp sensor...

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And here are the part #'s... #61318361787--BMW temp switch 180°/195° #61311378073--BMW temp switch 195°/ 210° #61131378412--BMW 90° angle connector #61130007445--BMW 90° green connector wires 2 required #61130007446--BMW 90° reen/black connector wire for ground #1398845--VOLVO dual fan relay... most of these can be found at any bone yard but I chose to buy the temp sensor, connector and wires new... The volvo relay I picked up with the wires at the local pick and pull... (this pic and part #'s I got from http://www.nastyz28.com/forum/showpost.php?p=2429746&postcount=123 ) so enjoy..!

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So the first thing to do is to take the clutch fan off... This can be a p.i.t.a. if u dont have an extra set of hands...

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I centered the mark8 fan shroud inside of my tahoes shroud, spray painted the mounting holes...

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All bolted in...

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New upper hose... Mark8 pigtail... The little gold thing is the bmw temp sensor... Summit inline hose adaptor (thanx sparg tyf)... and last the item is the volvo dual speed fan relay...

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Bmw sensor on the summit adaptor ( http://m.summitracing.com/parts/ATM-2283 ) ... This summit adaptor came wit a 3/8 fitting for a sensor... But this bmw sensor is a 14mm x 1.5 so I plugged the 3/8 and drilled and tapped the other side to 14mm x 1.5...

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So the way it works is the bmw sensor grounds the volvo relay at the first temp 180° and activates speed 1... Temp 195° grounds and actives speed 2... you'll probably never even use speed 2 unless you tap into your a/c controls like I did...

*** Update as of May 2013 I realized with the help of Sunlitcomet, that these temps are incorrect... I have a 160° T-stat my truck needs a 195° to burn efficiently... So unless ur supercharged a 160° may do more harm then good... Ive replaced the T-stat with a 195° and changed my BMW temp sensor to the higher temp part # 61311378073--BMW temp switch 195°/210°... I've added both BMW temp sensor part #s above so you can use which ever you like... I apologize if I mislead anyone...

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30 amp self resting circut breaker...

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Everything in place and wired up real nice like...

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Again bmw sensor... Over all an awsum mod... Not very difficult... Just took a while to educate myself with these things and hunt parts down... In total I probably spent $70 to $80 if that... I hope this helps yall & good luck...

Heres my Wile E. Coyote schematic...

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Post Ur setups wen complete..!

 

[dagen_1]

great write up.. thanks for posting.

 

[Devs93]

^^^this^^^

 

[Chris]

Why not spend an extra 30 minutes and cut the shroud down to where it's basically just holding the radiator in place? You don't need it anymore and that's the main reason I went to an efan......underhood space.

 

[monstar_est87]

Im more in2 the stock appearance... But ill probably look in2 that...

 

[TruckinAin4Sissies]

Dang, good post Sir!
I see you've been a member for a while (& haven't posted much), thank you for the write-up!

Could you go more into detail on the wiring aspect?


-Truckin'-

 

[Blue95]

Nice job, interesting parts and take on the setup.

 

[EmersonHart13]

I was under the impression these fans were pretty expensive?

 

[Blue95]

They can be had pretty cheap from a junkyard or pick and pull, I run a 16" Taurus fan from a '94 wired on high with great cooling.

 

[monstar_est87]

I have a hand drawn schematic sumwhere, but its really simple... Ill look for it and post it first chance I get...

P.s. Truckin, Yea Im usually hiding in the forums shadows but always here reading the posts the big boys are putting up... I try to make it count wen I do start up a new tread...