Aussie1 Posted July 4, 2008 Share Posted July 4, 2008 Hey guys. I just saw some updates to this posting so I thought I would reiterate what bowtied was asking to Morpheous: We know the power valve screws and what not were an issue, but what about the lower swirl valve screws, in the lower intake manifold? Are they of concern and should we do something about that? Or was it really just the upper power valves that were the issue? Thanks very much. Link to comment Share on other sites More sharing options...
BowTied Posted July 6, 2008 Share Posted July 6, 2008 I'm a service manager for North End Nissan ( www.northendnissan.ca ) I've only ever had 1 R50 with 1 power valve screw missing, and we replaced the entire power valve manifold section under warranty. Thanks for the reply. Let me know us know if you discover any concerns related to the swirl valve screws. I understand manual trans R50s do NOT have the power valves. I do not know if they have the swirl valves? Link to comment Share on other sites More sharing options...
morpheus Posted July 6, 2008 Share Posted July 6, 2008 Thanks for the reply. Let me know us know if you discover any concerns related to the swirl valve screws. I understand manual trans R50s do NOT have the power valves. I do not know if they have the swirl valves? I don't recall off the top of my head the manual vs. auto, but I think someone here had a manual one they said they took apart and it didn't have them. We only had that one, and it was a couple of years ago now. nothing since. Link to comment Share on other sites More sharing options...
IncidentalOffroader Posted July 18, 2008 Share Posted July 18, 2008 I understand manual trans R50s do NOT have the power valves. I do not know if they have the swirl valves? I'm pretty sure I saw swirl valves in the lower intake manifold of my manual R50, just like in the automatics. I was following BowTied's write-up and was aware of the swirl valve question. So I'm nearly 100% certain I looked for them, and if I didn't find them, I would have reported that along with the absent power valves. I might have pictures to back up my memory, but we're in the middle of a cross-country move so all my stuff is packed up. How about this: assume that manual R50's have swirl valves, and if I find out otherwise, I'll re-post. Link to comment Share on other sites More sharing options...
BowTied Posted July 22, 2008 Share Posted July 22, 2008 Thanks, sounds good. Link to comment Share on other sites More sharing options...
nmpath Posted January 1, 2009 Share Posted January 1, 2009 How many people have removed the upper intake manifold and found the screws secured tightly? Thanks. Link to comment Share on other sites More sharing options...
nmpath Posted January 3, 2009 Share Posted January 3, 2009 I took the intake off today and checked the power valves. Every screw was tight and they seemed to have red locktite on them, i took them out and put more locktite. My path is a 2002, I have owned it since it had 40K and it now has 90K. Even though I was probably safe I sure feel better. Link to comment Share on other sites More sharing options...
BowTied Posted January 4, 2009 Share Posted January 4, 2009 I took the intake off today and checked the power valves. Every screw was tight and they seemed to have red locktite on them, i took them out and put more locktite. My path is a 2002, I have owned it since it had 40K and it now has 90K. Even though I was probably safe I sure feel better. Very interesting. When I did my 02 there was no evidence of red thread locker on mine. The screws were not loose -as in backed off, but sure were not tight (you know, it takes a little effort and a bit of click or noise and then it breaks free when it was tight to begin with; I got nothing like that on mine). Link to comment Share on other sites More sharing options...
Nissan3 Posted January 10, 2009 Share Posted January 10, 2009 I took the intake off today and checked the power valves. Every screw was tight and they seemed to have red locktite on them, i took them out and put more locktite. My path is a 2002, I have owned it since it had 40K and it now has 90K. Even though I was probably safe I sure feel better. Hmmm, I wonder if the previous owner knew about the power valve screws and put the loctite on himself. Mine is an 03 and when I did them I had 2 screws that were off by about a thread, I've put on about 15k since then and no problems. Link to comment Share on other sites More sharing options...
nmpath Posted January 15, 2009 Share Posted January 15, 2009 Hmmm, I wonder if the previous owner knew about the power valve screws and put the loctite on himself. Mine is an 03 and when I did them I had 2 screws that were off by about a thread, I've put on about 15k since then and no problems. Im pretty sure a middle aged lady owned it before I did so I doubt anything was done. Link to comment Share on other sites More sharing options...
Nissan3 Posted January 16, 2009 Share Posted January 16, 2009 Im pretty sure a middle aged lady owned it before I did so I doubt anything was done. Haaaaha...ok scratch that Link to comment Share on other sites More sharing options...
ventec Posted February 3, 2009 Share Posted February 3, 2009 (edited) Well I'm a new member and with this topic being online I was able to quickly diagnose my issues with my 2002 Pathfinder. The Nissan dealer was telling me that the Catalytic disintegrated and took out the motor. not Believing them i looked into it a little closer and took off the throttle body and took a look . Here's what I came upon. the one picture is of the motor I recently purchased and is in good shape, but like bowtied had stated the screws do not seem to be overly tight, So i'll be going over all the screw with some Loctite before i install the new motor. http://img.photobucket.com/albums/v316/Ven...er/IMG00143.jpg http://img.photobucket.com/albums/v316/Ven...er/IMG00144.jpg http://img.photobucket.com/albums/v316/Ven...er/IMG00145.jpg http://img.photobucket.com/albums/v316/Ven...er/IMG00146.jpg http://img.photobucket.com/albums/v316/Ven...er/IMG00147.jpg http://img.photobucket.com/albums/v316/Ven...er/IMG00148.jpg Edited February 4, 2009 by ventec Link to comment Share on other sites More sharing options...
navygz19 Posted February 3, 2009 Share Posted February 3, 2009 Well I'm a new member and with this topic being online I was able to quickly diagnose my issues with my 2002 Pathfinder. The Nissan dealer was telling me that the Catalytic disintegrated and took out the motor. not Believing them i looked into it a little closer and took off the throttle body and took a look . Here's what I came upon. Well, what was it? Link to comment Share on other sites More sharing options...
BowTied Posted February 5, 2009 Share Posted February 5, 2009 Well I'm a new member and with this topic being online I was able to quickly diagnose my issues with my 2002 Pathfinder. The Nissan dealer was telling me that the Catalytic disintegrated and took out the motor. not Believing them i looked into it a little closer and took off the throttle body and took a look . Here's what I came upon. the one picture is of the motor I recently purchased and is in good shape, but like bowtied had stated the screws do not seem to be overly tight, So i'll be going over all the screw with some Loctite before i install the new motor. http://img.photobucket.com/albums/v316/Ven...er/IMG00143.jpg http://img.photobucket.com/albums/v316/Ven...er/IMG00144.jpg http://img.photobucket.com/albums/v316/Ven...er/IMG00145.jpg http://img.photobucket.com/albums/v316/Ven...er/IMG00146.jpg http://img.photobucket.com/albums/v316/Ven...er/IMG00147.jpg http://img.photobucket.com/albums/v316/Ven...er/IMG00148.jpg That sucks dude! How much damage, engine shot? Link to comment Share on other sites More sharing options...
nissandoms47 Posted February 5, 2009 Share Posted February 5, 2009 oh set dude, im so glad ive got a manual tranny. no power valves. Link to comment Share on other sites More sharing options...
navygz19 Posted February 5, 2009 Share Posted February 5, 2009 Holy @#*!!! Catastrophic engine failure. Damn, that's brutal. Link to comment Share on other sites More sharing options...
02silverpathy Posted February 5, 2009 Share Posted February 5, 2009 (edited) My 02 had a similar goop on the screws also. My truck was a company leased rig so I am quite sure she never saw any real maint., at least not past oil & filter changes and what not. You can see in the pic what looks like 2 threads of some locker. It was rubbery to the touch and came off fairly easy. Edited February 5, 2009 by 02silverpathy Link to comment Share on other sites More sharing options...
ventec Posted February 10, 2009 Share Posted February 10, 2009 That sucks dude! How much damage, engine shot? Yeah the motor is shot, it burns more than a litre of oil this this past week. On the weekend I started to pull the motor. It's a real pain, very little space to work on. by the end of the weekend I basically just have the torque converter bolts left and then motor is out. Mind you The vehicle is from Ontario the province Salts the roads alot!!!. I fought with the catalytic converter bolts for some time. I should have the new motor back in next weekend. The motor I picked up has only 90000km on it and is in really good shape. I have checked the power vavles already and they are all there so I'm gonna go through them and loctite them all. Ventec Link to comment Share on other sites More sharing options...
BowTied Posted February 10, 2009 Share Posted February 10, 2009 I am impressed you are doing this work yourself. Where in Ontario are you? I am in London. Link to comment Share on other sites More sharing options...
ventec Posted February 12, 2009 Share Posted February 12, 2009 I am impressed you are doing this work yourself. Where in Ontario are you? I am in London. I use to live in St Catharines but i've relocated to Calgary AB. for Work. Nothing like a project every now and then. I 'm not one to let people work on my toys when i know i can do it myself. Especially when they want to charge me $1600.00 in labour to repalce the motor. Link to comment Share on other sites More sharing options...
raz Posted February 23, 2009 Share Posted February 23, 2009 oh set dude, im so glad ive got a manual tranny. no power valves. Is this finally confirmed? Do the manual transmission R50s not have power valves? Thx, Raz Link to comment Share on other sites More sharing options...
ventec Posted February 25, 2009 Share Posted February 25, 2009 Well I got the new motor in, and it only took 3 weekends. I had a few ppl offer to lend a hand but when it came down to actually helping out they weren't around when they were really needed. It went quite well, a few differences between a 2002 and 2001, is that on the 2002 motor the valve covers were redesigned to accept the same Coil pack for Cyl's 1-6. Where in 2001 the motor is equiped with aluminum valve covers and require a separate Coil Pack for Cylinder #1. The other thing was the Oil Pressure sending unit, it has a different style connector. but other than those two items it was a straight forward swap. Link to comment Share on other sites More sharing options...
BowTied Posted February 25, 2009 Share Posted February 25, 2009 Congrats on the swap. If you have pics, start a new thread, I am sure it will help someone else some time. Link to comment Share on other sites More sharing options...
raz Posted March 4, 2009 Share Posted March 4, 2009 I'm having some work done on my 5spd 2001 SE 3.5L Pathfinder very soon. I'm wondering if I should get the mechanic to check the power valve screws. But is it true that the 5spd manual doesn't have the power valve screw issues as reported here? Thanks, Raz Link to comment Share on other sites More sharing options...
laxman0324 Posted March 4, 2009 Share Posted March 4, 2009 It is true, if you want peace of mind you can have him check it, but I have seen a couple sources that have removed the intake manifold and saw no power valve screws on their 5 speed Link to comment Share on other sites More sharing options...
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