CDNBullrid Posted January 25, 2008 Share Posted January 25, 2008 wanting to replace my waterpump on my 01 LE with the 3.5L what is all involved in replacing the pump. i have the pump and saw the gear side with all the teeth for the chain which got me a little nervous. please fill me in on all the possible info. thanks much Link to comment Share on other sites More sharing options...
Casey.T Posted January 25, 2008 Share Posted January 25, 2008 and you might find something like this..... http://www.nissanpathfinders.net/forum/index.php?showtopic=12828 Now make sure you read it all.... Link to comment Share on other sites More sharing options...
5523Pathfinder Posted January 25, 2008 Share Posted January 25, 2008 Why do you need to change the water pump. Yes, the water pump in a 3.5 is driven by the timing chain. They are considered a low drag pump and I have never had to replace one. If you do need to replaced it, I do belive you remove the inspection covers for the water pump and chain tensioner. You need to remove tension from the chain. Pull the pump and put the new one in. Its sounds easy, but it really isnt. I will see if I can find a writeup about it. Link to comment Share on other sites More sharing options...
5523Pathfinder Posted January 25, 2008 Share Posted January 25, 2008 (edited) Here you go. I will try and download some pictures to help out! CAUTION: When removing water pump assembly, be careful not to get coolant on drive belt. Water pump cannot be disassembled and should be replaced as a unit. After installing water pump, connect hose and clamp securely, then check for leaks using radiator cap tester. REMOVAL Remove undercover. Remove suspension member stay. Drain coolant from radiator. Remove radiator shrouds. Remove drive belts. Remove cooling fan. Remove water drain plug on water pump side of cylinder block. http://i169.photobucket.com/albums/u225/55.../waterpump2.gif Remove chain tensioner cover and water pump cover. http://i169.photobucket.com/albums/u225/55.../waterpump3.gif Pushing timing chain tensioner sleeve, apply a stopper pin so it does not return. Then remove the chain tensioner assembly. http://i169.photobucket.com/albums/u225/55.../waterpump4.gif Remove the 3 water pump fixing bolts. Secure a gap between water pump gear and timing chain, by turning crankshaft pulley 20°backwards. http://i169.photobucket.com/albums/u225/55.../waterpump5.gif Put M8 bolts to two water pump fixing bolt holes. http://i169.photobucket.com/albums/u225/55.../waterpump6.gif Tighten M8 bolts by turning half turn alternately until they reach timing chain rear case. In order to prevent damages to water pump or timing chain rear case, do not tighten one bolt continuously. Always turn each bolt half turn each time. Lift up water pump and remove it. When lifting up water pump, do not allow water pump gear to hit timing chain. INSPECTION http://i169.photobucket.com/albums/u225/55.../waterpump7.gif Check for badly rusted or corroded body assembly. Check for rough operation due to excessive end play. INSTALLATION http://i169.photobucket.com/albums/u225/55.../waterpump8.gif Apply engine oil and coolant to 0-rings as shown in the figure. http://i169.photobucket.com/albums/u225/55.../waterpump9.gif Install water pump. Do not allow cylinder block to nip O-rings when installing water pump. http://i169.photobucket.com/albums/u225/55...waterpump10.gif Before installing, remove all traces of liquid gasket from mating surface of water pump cover and chain tensioner cover using a scraper. Also remove traces of liquid gasket from mating surface of front cover. http://i169.photobucket.com/albums/u225/55...waterpump11.gif Apply a continuous bead of liquid gasket to mating surface of chain tensioner cover and water pump cover. http://i169.photobucket.com/albums/u225/55...waterpump12.gif Return the crankshaft pulley to its original position by turning it 20°forward. http://i169.photobucket.com/albums/u225/55...waterpump13.gif Install timing chain tensioner, then remove the stopper pin. When installing the timing chain tensioner, engine oil should be applied to the oil hole and tensioner. After starting engine, let idle for three minutes, then rev engine up to 3,000 rpm under no load to purge air from the high-pressure chamber of the chain tensioners. The engine may produce a rattling noise. This indicates that air still remains in the chamber and is not a matter of concern. Reinstall any parts removed in reverse order of removal. Edited January 25, 2008 by 5523Pathfinder Link to comment Share on other sites More sharing options...
02silverpathy Posted January 25, 2008 Share Posted January 25, 2008 YIKES! Glad my girl only has 49K on her!! Hope it lasts a while! Link to comment Share on other sites More sharing options...
CDNBullrid Posted January 25, 2008 Author Share Posted January 25, 2008 this is AWESOME info!!!!!!! i dont really know if my waterpump is shot. a sound is coming from my engine and it is either the waterpump or the timing chain tensioner which is loose. can i run the engine with the chain tensioner cover and water pump cover removed?? i could hear where the sound is coming from better. Thanks again for the much indepth info!!!! Link to comment Share on other sites More sharing options...
5523Pathfinder Posted January 26, 2008 Share Posted January 26, 2008 What kind of noise is it? I know that if the oil level drops to a certian level(low) it can starve the vtc's and create noise. Matter of fact, I just recieved a TBS about it(06-023a). I have also seen the belt tensioner pulley bearings go bad and make noise. Might want to check around a little more to make sure. Link to comment Share on other sites More sharing options...
CDNBullrid Posted January 28, 2008 Author Share Posted January 28, 2008 (edited) i have the 3.5L engine with a timing chain. i was thinking it might be the tensioner loose but most of the guys ruled that out. so this was my next hope. i have the other thread on my Timing Chain but that is almost ruled out. Edited January 28, 2008 by CDNBullrid Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now