Disclosure: we may earn money or products from the companies mentioned in this post via affiliate links to products. This doesn't make any additional cost to you. The QR25DE is a 2. The engine bore is 89 mm with a stroke of mm and a compression ratio ranging from 9. When performing any inspection or maintenance work on your vehicle, always take care to prevent serious accidental injury to yourself or damage to the vehicle. The following are general precautions that should be closely observed.

Uncontinuous oil leaking?! That is a huge problem! Fortunately we know how to help. Causes by the failure of the cooling pump. Micron leaks allow antifreeze to get into the combustion chamber.

Thus oxygen sensors tend to register a rich composite fuel. Some problems when starting the engine, stall, speed floating.

The solution to this problem is rather expensive. Replacing the cylinder head gasket may cost some money. Grinding head and the block, the new gasket head bolts. To avoid this it is necessary to monitor the condition of the radiator honeycombs inside and out, monitor the temperature of the motor, monitor the level of antifreeze and its color.

Ensure proper operation of the cooling fans. Or simply visit regularly the diagnostics, where all the specialists will check and fix any problems found. Dan is a co-founder of Engineswork. He knows everything about internal combustion engines. Ask your questions in comments down below this article - he will be glad to help you anytime. The choice of a clutch is a very serious issue that demands much attention and time as it goes in various forms.

Thus, centrifugal clutches are employed for mopeds whereas many race cars utilize Skip to content. Continue Reading. No ratings yet.The QR family of inline-four piston engines by Nissan were introduced in and range from 2. These motors are aluminum, dual overhead camshaft DOHCfour-valve designs with variable valve timing and optional direct injection.

The engine shares much of its architecture with the YD diesel engine. The 2. The QR25DE is a 2. These include:.

Nissan QR25DE 2.5L Engine Review

This engine is also the first QR to use DLC coating on the valve lifter buckets for reduced friction. The engine has a compression ratio of 9. From Wikipedia, the free encyclopedia. This article includes a list of referencesbut its sources remain unclear because it has insufficient inline citations.

Please help to improve this article by introducing more precise citations. March Learn how and when to remove this template message. Vehicle applications:. Nissan Motor Company. Alfa Romeo Nissan Autoveicoli S. Dongfeng Motor Co. HR UD. SAE International.

qr25de specs

Archived from the original on Categories : Nissan engines Inline-four engines Gasoline engines by model. Hidden categories: Articles lacking in-text citations from March All articles lacking in-text citations. Namespaces Article Talk. Views Read Edit View history. In other projects Wikimedia Commons. By using this site, you agree to the Terms of Use and Privacy Policy. Nissan Nissan Machinery. DOHC 4 valves x cyl. Straight-3 HR UD.The 2. The engine has another crankshaft, and now engine stroke is mm 2.

The connecting rods were shortened. That allowed to increase the engine displacement to 2. That made this engine more torque. However, that also brings more stress on engine cylinders itself, on piston rings and rods. The engine warranty is shorter than two-liter brother had, and the problem of high oil consumption is more common for the QR25DE.

VQ35DE: Everything You Want to Know | Specs and More

Some improvements were made in The engine got new pistons and reinforced connecting rods. The balancing system was moved slightly to a central location in the block. Also, the engine was equipped with new camshafts. The engine block still is aluminum like it was. There are more vibrations and run-out processes.

Nissan QR25DE 2. Engine Specs Manufacturer. Production years. Cylinder block material. Cylinder head material. Fuel type. Number of cylinders. Valves per cylinder. Valvetrain layout. Bore, mm. Displacement, cc. Type of internal combustion engine. Compression Ratio. Torque, lb ft. Firing order. Engine oil weight.

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Engine oil capacity, liter. Oil change interval, mile. Share with friends:. HR16DE 1.The QR20DE engine has an aluminum block and cylinder head, dual overhead camshaft DOHCfour-valve designs with continuously variable valve timing CVTC on the intake camshaft, individual ignition coils, electronic throttle, and multi-point fuel injection system. An Compression ratio rating is 9. The QR20DE has an aluminium block, cylinder bore is The pistons are each fitted with two compression rings and a single oil ring, connecting rods are mm long.

The crankshaft for the QR20DE engine has two balancer shafts and supported by five main bearings. The engine has an aluminum cylinder head with two chain-driven overhead camshafts and variable valve timing CVTC on the intake camshaft.

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The QR20DE does not have hydraulic lifters, so special valve lifters are used to adjust the valve clearance. The service life of the QR20DE engine is aboutmiles of mileagekm.

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The valve clearance needs to be adjusted every 60, miles of mileage 90, km. Calculate the thickness of new adjusting valve lifter so valve clearance comes within specified values. Valve lifters are available in 26 sizes from 6.

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Whenever valve clearances are adjusted to cold specifications, check that the clearances satisfy hot specifications and adjust again if necessary. We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair.

We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.

Please I need torque specifications or table for the engine. I have a nv i live in Kingston Jamaica. Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.

Contact As. Dear visitors, this site is not a trading platform, an official dealer or a spare parts supplier, so we do not have any price lists or spare parts catalogs. We are an information portal and provide the technical specifications of gasoline and diesel engines.

I have a qr20d, now my question is;can I put a qr25de head gasket in my qr20d? Yes, both engines are equipped with the same gasket Part number: N Nissan Serena failing ignection system what will be the problem please assit.First it was installed on Nissan X-Trail.

This engine acquired new aluminium cylinder block, new crankshaft with QR20DE connecting rods are mm long. Cylinder head is also new. It has two camshafts and continuously variable valve timing CVTC.

qr25de specs

There are no hydraulic lifters on QR20DE, therefore every 60, miles of mileage 90, km you need regulating valve clearance. Usually nobody does it in the old cars, waiting for engine rattle to appear, and only then valve clearance is adjusted. This engine is also equipped with ignition system with individual ignition coils, electronic throttle body and two balancer shafts for the engine to work smoother and even. Also QG20DD was produced as the version with direct injection system.

HERE you can know in detail about them.

QR25DE Engine Reliability and Specs

The engine number is on the tablet on the right side of cylinder block. To acquire some additional power, you need to purchase Balancer shaft removal kit, and also to install header, cat-back performance exhaust system and to adjust ECU.

It will add about 20 HP. It would be quite expensive to make naturally aspirated QR20DE still more powerful, therefore it is better whether to stop at this or sell your car and purchase Nissan Z or Mitsubishi Evolution.

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Though you would gain much power, the cost is extremely high. It is quite irrational wasting. Mitsubishi 4G Honda K20A K20C.

Honda K24A K24Z. Honda R18A. Honda R20A. Honda L15A L15B. Honda L13A L13B. Honda D15B D15A. Honda D17A.

Nissan QR engine

Toyota 2UZ. Honda J Toyota 5A. BMW S Toyota 2ZR. No Ratings Yet. Latest Most popular Mitsubishi 4G DOHC 4 valves per cylinder. Engine lifespan, km miles -Official information -Real.This engine was developed in and substituted KA24DE.

It is the same as QR20DEbut new crankshaft with piston stroke mm was installed into cylinder block. Deck height remained the same, mm. Also the engine has mm connections rods and pistons with dish, their compression height is 32 mm. All that let increasing engine displacement to 2. Cylinder block remained the same. Cylinder head is also the same as on QR20DE. This engine does not use hydraulic tappets, so every 60, miles of mileage 90, km you should regulate the valves to avoid appearing of irritable ticking noise.

Also QR25DE uses individual ignition coils and electronic throttle body. As it is peculiar to many large 4-cylinder engines, QR25 also has two balancer shafts, which let the engine working smoothly and diminish vibration. In QR25DE was upgraded. Intake manifold and pistons were modified, connecting rods were reinforced, balancer shafts were somewhat moved. Also camshafts were somewhat updated, redline was raised and some more insignificant novelties happened yet.

Its compression ratio was increased to It uses new pistons and compression ratio is reduced to 9. Besides, 20 HP electro motor was installed on that engine.

Idle problems, jerking. More likely your QR25DE timing chain has stretched. It often happens on the very first generation of the engines. You need to change timing chain and usually it solves the problem completely.

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Oil leak. Usually valve cover gasket is leaking. Upon changing it, everything will be all right. High oil consumption. If your oil consumption exceeds 1 qt.

It may need overhaul. Fuel injectors and throttle body require cleaning. QR25DE vibration. It mainly happens because of lame soft ECU, it must be changed. Yet the spark plugs may be the reason, perhaps they have expired. Anyway, it is hard doing it. If the engine was produced tillcatalytic converter may fail often. It happens because of lame soft ECU also. It gave a lot of fuel, and burning down in catalytic converter, it promoted its quick destruction. Also thermostat on QR25DE does not have long lifetime, and when it fails, the engine may overheat.

Service life of QR25DE is aboutmiles of mileagekm at general exploitation by common person. Is QR25DE a good engine? Having compared it with KA24DE, it is evident that QR25 has become more modern and producible, but along with this, it has many shortcomings.

While old KA24DE is not that perfect, but thanks to its simplicity, it is rather reliable and durable. Anyway, if you have decided to increase the power of your engine, you will need to purchase some performance parts.The engine was produced since It is the same as QR20DEbut new crankshaft with The QR25DE engine has an aluminum cylinder block and head. It used dual overhead camshaft DOHCfour-valve designs with continuously variable valve timing CVTC on the intake camshaft, individual ignition coils, electronic throttle, and multi-point fuel injection system.

The engine built with cast steel connecting rods, a steel timing chain, counter-rotating balance shafts, and an aluminum intake manifold. In the QR25DE was upgraded. The new engine has higher rev limit and improved power output. These upgrade included:.

An Compression ratio rating is ranging from 9. The QR25DE has an aluminum block, cylinder bore is The pistons are each fitted with two compression rings and single oil ring, cast steel connecting rods are The crankshaft for QR25DE engine has two balancer shafts and supported by five main bearings.

The crankshaft main journal diameter is The engine has an aluminum cylinder head with two chain-driven overhead camshafts four valves per cylinder and variable valve timing CVTC on the intake camshaft. Intake valves are The QR25DE engine does not have hydraulic lifters, so special valve lifters are used to adjust the valve clearance. The service life of the QR25DE engine is aboutmiles of mileagekm.

qr25de specs

The valve clearance needs to be adjusted every 60, miles of mileage 90, km. Calculate the thickness of new adjusting valve lifter so valve clearance comes within specified values.