steveosupremeo Posted November 30, 2007 Share Posted November 30, 2007 being a nissan tech i will tell you we have one in for a headgasket at least once a week and we are a smallish dealership. crank sensors suck. throttle chambers aren't the greatest, if you keep the factory front cat. setup expect it to eventually revert a "dust" back into the engine and eat rings, mainly on 02-03 models, expect a headgasket every 60Kish. some will have better luck, but most won't. sorry, this is just my 5 day a week experience with this motor. Quote Link to comment Share on other sites More sharing options...
Careless Posted November 30, 2007 Share Posted November 30, 2007 I've also conversed with someone who had the headgasket go twice on his. so it is true! Quote Link to comment Share on other sites More sharing options...
MrFancypants Posted November 30, 2007 Share Posted November 30, 2007 Yet ANOTHER QR25-based recall: http://www.msnbc.msn.com/id/21938658/ - Greg - Quote Link to comment Share on other sites More sharing options...
Careless Posted December 1, 2007 Share Posted December 1, 2007 Yet ANOTHER QR25-based recall: http://www.msnbc.msn.com/id/21938658/ - Greg - This reminds me of the Acura TL cam angle sensors. Apparently they're attached to the head with epoxy... and if your headgasket goes as a result of engine overheating, you melt the epoxy and you can't get them back on in the same place easily... better off getting another engine. Quote Link to comment Share on other sites More sharing options...
battlemac Posted January 4, 2008 Share Posted January 4, 2008 so if we use the whole QR25 motor and tranny off the Frontier would one run into some of those issues you are facing? Like the lock out and such? Btw is the Frontier using a 6-speed in the QR or is that just in the VQ? Quote Link to comment Share on other sites More sharing options...
nbesheer Posted January 4, 2008 Share Posted January 4, 2008 I think that the frontier is a 5 speed, my friend had one and I don't remember 6 speeds. Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted January 9, 2008 Share Posted January 9, 2008 From what I have heard only the VQ40 had the 6 speed. I almost bought a 2005 Fronty with the QR25 but ended up getting a 2004 Fronty VG33/5 speed for a little cheaper. (more low end torque for hauling engines around...) Quote Link to comment Share on other sites More sharing options...
timbo1jz Posted January 31, 2008 Share Posted January 31, 2008 I also work for Nissan and we see so many headgaskets, throttle chambers, crank sensors, fuel pumps, and cats go bad. We also see the powervalve screws come apart and take the motor out. But the worst thing about that motor, is that we see a lot of oil consumption. A couple of years they were produced with bad piston rings and they burnt oil. They have a recall to test the crank case pressure, to determine if the motor needs to be replaced. Since then they have worked out that problem on the new qr25's. I have seen at least 5 Altimas throw rods out the block due to oil loss. I honestly hate that motor. Quote Link to comment Share on other sites More sharing options...
steveosupremeo Posted January 31, 2008 Share Posted January 31, 2008 i hate the motor but what i hate more is that Nissan could have made it soo much better and didn't. Quote Link to comment Share on other sites More sharing options...
z-ya Posted January 31, 2008 Share Posted January 31, 2008 Yes, I agree, it is not the greatest motor. I will say that it moves a fairly heavy Altima around very well, and gets great mileage. I will also say that they make a lot of interesting noises (at least my Wife's did). She traded it in for a new Jetta with the 2.5L I5. That is a motor to really hate. It might be reliable, but it always sounds like it is missing on a cylinder, and it is very noisy. The VW 2.5L I4 is a much better engine (sorry for the off topic). Quote Link to comment Share on other sites More sharing options...
timbo1jz Posted February 11, 2008 Share Posted February 11, 2008 yes it is a very noisy motor. The injectors are also very noisy on the qr25. The only good thing about the motor is that It is pretty good on leaks. They don't tend to leak that much. I have seen a couple of torque converter seals leak and a couple of front covers leak with high mileage, but thats it. Quote Link to comment Share on other sites More sharing options...
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