traxx2003 Posted August 18, 2012 Report Share Posted August 18, 2012 (edited) Okay, so today I decided to install my new Mull water pump/gear, and I ran into some issues. Well, when I installed the new pump and gear, when I rotate the pump by hand, the fins rub against the water pump housing. Is this normal? I know everything is installed correctly, Here is a picture of the housing, notice the black scratch marks that the new pump left behind. Anybody has experienced this issue with the Mull water pumps? http://i1091.photobucket.com/albums/i391/traxxi2003/MullWaterPump.jpg Edited August 18, 2012 by traxx2003 Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted August 18, 2012 Report Share Posted August 18, 2012 Pm blowit Quote Link to comment Share on other sites More sharing options...
blowit Posted August 18, 2012 Report Share Posted August 18, 2012 I talked with someone (possibly this customer) a short while ago. I will mention a few things for any other customers with questions. We manufacture our pumps tighter than all other manufactures to optimize efficiency. It is important to remember that the pump shaft is pushed away from the clutch cover housing by the engine case pushing against the back of the shaft when the cover is installed. If a thicker than OEM clutch cover gasket is used, you could experience minor rubbing. This can be remedied by using a thinner gasket, lightly sanding the leading edges of the impeller, or by shimming the back of the shaft about .005" to gain clearance. Also, if the bearing and seal are replaced and not pressed in all the way, this will also cause issues. Brandon Mull Engineering Quote Link to comment Share on other sites More sharing options...
Strm Trpr Posted August 19, 2012 Report Share Posted August 19, 2012 I have a question, can I use the new Mull Engr waterpump impeller/shaft and this cover from Chariot Performance? http://www.ebay.com/itm/250997180275?redirect=mobile Quote Link to comment Share on other sites More sharing options...
blowit Posted August 19, 2012 Report Share Posted August 19, 2012 I have a question, can I use the new Mull Engr waterpump impeller/shaft and this cover from Chariot Performance? http://www.ebay.com/itm/250997180275?redirect=mobile I don't see any reason that would not work just fine. If the cover will work with the factory or OEM impeller, it will work with ours as well. Thanks Quote Link to comment Share on other sites More sharing options...
Strm Trpr Posted August 19, 2012 Report Share Posted August 19, 2012 Excellent! Quote Link to comment Share on other sites More sharing options...
traxx2003 Posted August 19, 2012 Author Report Share Posted August 19, 2012 Update, First I will like to say Thank you "blowit" for such a quick response to my call!!! A++++++ customer support!! considering I called on a Saturday around 4:30PM pacific time, I never expected to get a response until Monday, so Thank you again for such a great service!! After talking to blowit today, I followed his recommendations and I'm glad to report that the new billet impeller works excellent. Thank you Mull Engineering for such a great product. Quote Link to comment Share on other sites More sharing options...
fastforworddad Posted August 19, 2012 Report Share Posted August 19, 2012 Yeah, Brandon is a very good guy. Update, First I will like to say Thank you "blowit" for such a quick response to my call!!! A++++++ customer support!! considering I called on a Saturday around 4:30PM pacific time, I never expected to get a response until Monday, so Thank you again for such a great service!! After talking to blowit today, I followed his recommendations and I'm glad to report that the new billet impeller works excellent. Thank you Mull Engineering for such a great product. Quote Link to comment Share on other sites More sharing options...
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