Yet another question about underdrive pulleys...

Posted by: mdbosworth

Yet another question about underdrive pulleys... - 08/27/20 06:04 PM

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?
Posted by: BigMerc96

Re: Yet another question about underdrive pulleys... - 08/27/20 06:29 PM

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.
Posted by: mdbosworth

Re: Yet another question about underdrive pulleys... - 08/28/20 09:21 PM

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...
Posted by: RF_Overlord

Re: Yet another question about underdrive pulleys... - 08/29/20 01:08 AM

Use a chain wrench to hold the balancer.
Posted by: mdbosworth

Re: Yet another question about underdrive pulleys... - 08/29/20 10:46 PM

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
Posted by: 2004_p71

Re: Yet another question about underdrive pulleys... - 08/30/20 08:57 AM

what brand did you get ?
Posted by: mdbosworth

Re: Yet another question about underdrive pulleys... - 08/30/20 09:14 AM

Found used steedas on ebay.