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Maybe you should attempt a rebuild yourself? Really, it doesn’t take all that much to rebuild an engine. Now, I say that pretty flippantly, but considering the quality of what you’ve gotten already, I’m betting you could get a rebuild kit and redo the old sentra engine with a small investment in some tools and probably have a lot more confidence in it than you are going to have with these other jokers. If the cylinders aren’t terrible scored or worn ( tapered top to bottom ), you could probably get a drill powered hone and hone the cylinders, get some new rings for the pistons, probably a new set of crank and rod bearings, along with a full gasket set, new oil pump and freshen that old motor back into shape.
My wife’s grandfather used to keep the old car running with strips of leather for crank bearings way back in the day….the car ran great according to him. Sometimes you can only trust only one mechanic…you.
Wow, talk about bad luck and alot of frustration!
The QR25DE engine from Nissan is a known oil drinker which effected 02 to 06 Altima’s and Sentra’s. They did recall alot of those engines too.
Quoted From redfury:
Maybe you should attempt a rebuild yourself? Really, it doesn’t take all that much to rebuild an engine. Now, I say that pretty flippantly, but considering the quality of what you’ve gotten already, I’m betting you could get a rebuild kit and redo the old sentra engine with a small investment in some tools and probably have a lot more confidence in it than you are going to have with these other jokers. If the cylinders aren’t terrible scored or worn ( tapered top to bottom ), you could probably get a drill powered hone and hone the cylinders, get some new rings for the pistons, probably a new set of crank and rod bearings, along with a full gasket set, new oil pump and freshen that old motor back into shape.
My wife’s grandfather used to keep the old car running with strips of leather for crank bearings way back in the day….the car ran great according to him. Sometimes you can only trust only one mechanic…you.
I didnt considering rebuilding myself this engine because of time, i just couldnt do it, the car was in another city, and it would take me at least 8 weekends to get it right and traveling back and fort is expensive, and risking it wouldnt work because i accidentally over torqued something or something like that.
So i decided to buy a remanufactured engine, i said to myself “well those engines are fully repaired and will give me at least another 450,000 kilometers” so lets go for it.
Quoted From dreamer2355:
Wow, talk about bad luck and alot of frustration!
The QR25DE engine from Nissan is a known oil drinker which effected 02 to 06 Altima’s and Sentra’s. They did recall alot of those engines too.
Indeed, and yeah the precats in the QR25 were a stupid design and the consequences are there, they also like to eat their own Throttle-body bolts hehe
Gladly i dont own a car with that engineIf your old engine is just suffering from a major sludging, you could maybe just try to clean out all the crud and hope for the best. The way I’d go about doing that, especially since you’ve already got the engine out of the car, would be to pull the valve cover off and use a flat head screw driver or something similar, to dig out as much sludge as possible. I’d also get a new oil pan (mostly because I’m lazy and it’s quicker to just slap on a new pan than to clean out the old one), remove the oil pickup tube and clean that out as best I could. Once I had everything reassembled, I’d get some clean, cheap oil, a couple cheap filters and a couple quarts of generic automatic transmission fluid. I’d then put a quart of ATF into the engine, fill it the rest of the way with the cheap oil, put a cheap filter on it and then run it as idle until it got warm. Provided that it’s not making any abnormal noises during that process, after the engine warmed up I’d drain the oil, change the filter again, and repeat the process two or three times. Once the oil stopped having chunks floating in it, I’d put some good quality oil and a good filter on it and hope for the best.
Quoted From 3SheetsDiesel:
If your old engine is just suffering from a major sludging, you could maybe just try to clean out all the crud and hope for the best. The way I’d go about doing that, especially since you’ve already got the engine out of the car, would be to pull the valve cover off and use a flat head screw driver or something similar, to dig out as much sludge as possible. I’d also get a new oil pan (mostly because I’m lazy and it’s quicker to just slap on a new pan than to clean out the old one), remove the oil pickup tube and clean that out as best I could. Once I had everything reassembled, I’d get some clean, cheap oil, a couple cheap filters and a couple quarts of generic automatic transmission fluid. I’d then put a quart of ATF into the engine, fill it the rest of the way with the cheap oil, put a cheap filter on it and then run it as idle until it got warm. Provided that it’s not making any abnormal noises during that process, after the engine warmed up I’d drain the oil, change the filter again, and repeat the process two or three times. Once the oil stopped having chunks floating in it, I’d put some good quality oil and a good filter on it and hope for the best.
That would be an option, but i have already purchased the used engine.
And i do want to do that, i removed the head already, and ill clean it someday, but i want to make use of it in another way, perhaps powering an electric generator, or a gokart 😛 , i only need the arness, ecu and throttle body, it is a very simple engine and i dont think all that will cost that much.
Quoted From SmopuiM:
Indeed, and yeah the precats in the QR25 were a stupid design and the consequences are there, they also like to eat their own Throttle-body bolts hehe
Gladly i dont own a car with that engineMe and my wife did own one. Notice the word ‘did’. It was consuming a few quarts of oil every week then on day broke down as my wife was driving to work. She said she had to add 3 quarts of oil on the way to work.
Nissan would not honor the recall on our engine as it was an 02 and the recall started at 03.
And yep on the butterfly screws being digested by the engine.
Oh well, all major auto manufacturers have there ‘weakest link’.
Quoted From dreamer2355:
Me and my wife did own one. Notice the word ‘did’. It was consuming a few quarts of oil every week then on day broke down as my wife was driving to work. She said she had to add 3 quarts of oil on the way to work.
Nissan would not honor the recall on our engine as it was an 02 and the recall started at 03.
And yep on the butterfly screws being digested by the engine.
Oh well, all major auto manufacturers have there ‘weakest link’.
Yep i never liked this engine, nissan let itself go; what happened to the great SR’s and GA’s, even the rods in the QR where casted instead of forged.
Anyways as an update, ive already cleaned the engine, and the wear on the bearins doesnt seem that bad, the, the cilynder wall in the other hand its like the engine machined itself to .020mm hehe.
I feel you pain man, and you just passed the crash course for “dealing with rebuild engines and mechanics in Venezuela” yaaay L:D With my Swift the same happened but with the gearbox. Right now, at last, is working and running good, but yes, the only good mechanic is… yourself. Do yourself a favor a download the service manual, it will really help you (it is still helping me understand my car).
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