#4075768 - 08/27/20 06:04 PM
Yet another question about underdrive pulleys...
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n00b
Registered: 02/27/19
Posts: 26
Loc: Florida
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First, thanks @DC_Dave appreciate the pulleys
Got a question.
The alternator and water-pump pulleys on the car are smaller than the steeda version.
The only pulley that is smaller than what's on my 2008 CVPI is the crankshaft pulley
Can I keep the smaller pulley's and only change the crankshaft?
I'm not planning to change the alt pulley...
Do I have to change the water-pump pulley?
Will I need to get a new belt, if I don't change the WP pulley?
Edited by mdbosworth (08/27/20 06:06 PM)
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2008 P71 - 3.55 tracloc - NVHP, Carson City
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#4075770 - 08/27/20 06:29 PM
Re: Yet another question about underdrive pulleys...
[Re: mdbosworth]
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I know nothing
Posting Addict
Registered: 06/05/10
Posts: 19868
Loc: I can see Detroit from here!
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You need to change the harmonic balancer and water pump pulley if you have any hopes of using the stock length belt. The balancer pulley is smaller, this is in part what "under drives" the accessories, smaller main pulley means everything else spins slower. The larger water pump pulley is larger which makes up most of the difference in belt length, with the downside being that it does slow down the pump even further. This doesn't seem to be a problem, there are thousands of cars out there running under drive pulleys and you don't hear about them overheating all the time.
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-Steve  2006 Audi A6 ~132k miles, stock. 1998 Mercury Grand Marquis LS HPP ~100k miles, slowly acquiring modifications. 1997 Town Car Cartier ~145k miles, Ported Plenum, Gutted Airbox, Contour E-fan Retrofit, Dual exhaust with Magnaflows, cats deleted, MSD Ignition, KYB Gas-A-Justs, P71 front bar, air ride reinstated, Projector retrofit, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit, holistic weight reduction as the parts fall off.. 1996 Mercury Grand Marquis GS 117,485mi. R.I.P. 7/14/12 
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#4075884 - 08/28/20 09:21 PM
Re: Yet another question about underdrive pulleys...
[Re: BigMerc96]
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n00b
Registered: 02/27/19
Posts: 26
Loc: Florida
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Thanks big merc, I get it now...
So i tried to get that darn crankshaft bolt loose, (frame and breaker bar, screwdriver and breaker bar) using everything but my impact driver.
Going to remove the radiator fan to get the room to loosen that bolt. Any other suggestions?
Now great I get on the steeds har. balancer. Im using an ARP TTY bolt. How in the hell am I going to get the proper torque specs if the pulley turns???
I've been search on this site and others but just can't seem to find the knowledge I need. It must be buried. Youtube hasn't helped much either...
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2008 P71 - 3.55 tracloc - NVHP, Carson City
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#4075914 - 08/29/20 01:08 AM
Re: Yet another question about underdrive pulleys...
[Re: mdbosworth]
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Poobah
Registered: 12/14/02
Posts: 7407
Loc: MA
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Use a chain wrench to hold the balancer.
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'03 Mercury Marauder (The Blackbird)
Trilogy Motorsports supercharged #61
Too many mods to list / Driveway Queen
'04 Grand Marquis LS Limited Edition (Spruce Green)
Daily Driver (Thanks, Adam!)
'00 Grand Marquis GS (Silver)
Rotted frame and broken transmission crossmember
Being resurrected...slowly.
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#4076020 - 08/29/20 10:46 PM
Re: Yet another question about underdrive pulleys...
[Re: mdbosworth]
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n00b
Registered: 02/27/19
Posts: 26
Loc: Florida
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Thx folks! Successful install today. Thank goodness for air tools. Took out the radiator fan, so much more room. I know I don't post much, there is so much knowledge to search through no need for me to ask any questions, lol. I do appreciate CVnet
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2008 P71 - 3.55 tracloc - NVHP, Carson City
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#4076042 - 08/30/20 09:14 AM
Re: Yet another question about underdrive pulleys...
[Re: 2004_p71]
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n00b
Registered: 02/27/19
Posts: 26
Loc: Florida
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Found used steedas on ebay.
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2008 P71 - 3.55 tracloc - NVHP, Carson City
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