Jump to content

  • Welcome to Auto Parts Forum

    Whether you are a veteran automotive parts guru or just someone looking for some quick auto parts advice, register today and start a new topic in our forum. Registration is free and you can even sign up with social network platforms such as Facebook, X, and LinkedIn. 

     

Engine overheating or undercooling hazards


Recommended Posts

Automobile engine is a kind of machine which provides power for automobile, and it is the heart of automobile. It affects the power, economy and environmental protection of automobile. According to different power sources, automotive engines can be divided into diesel engine, gasoline engine, electric vehicle motor and hybrid power.

Engine overheating will cause the following hazards to the car:

1) reduce inflation efficiency and reduce engine power.

2) the tendency of early combustion and deflagration increases, resulting in early damage to parts due to additional impact loads.

3) the normal clearance (thermal expansion and cold contraction) of the moving parts is destroyed, the movement block, the wear aggravate, or even damage.

4) the deterioration of lubrication aggravates the friction and wear of parts.

5) the mechanical properties of parts are reduced, resulting in deformation or damage.

And if the engine is too cold, it will also do harm to cars.

1) When the temperature of the mixture (or air) entering the cylinder is too low, the quality of the combustible mixture is poor (poor atomization), which makes it difficult to ignite or slow combustion, resulting in a decrease in engine power, an increase in fuel consumption (excessive heat loss, fuel condensation into the crankcase).

2) Water vapor in combustion products easily condenses into water and forms acids with acidic gases, which aggravates the erosion of the body and parts.

3) Unvaporized fuel scouring and diluting the oil film on the surface of parts (cylinder wall, piston, piston ring, etc.), which aggravates the wear of parts. 4) Increased viscosity of lubricating oil, poor fluidity, resulting in poor lubrication, worsening parts wear and power consumption.

link hidden, please login to view

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Topics

    • By Counterman
      It seems like everything old is new again. TV and movie producers love to “reboot” our favorite classics, musicians regularly cover or sample from songs we all know (and sometimes loved). Fashions from high school that make us cringe will be back in style sooner or later.
      It can serve to bring us together by introducing younger generations to the things their parents knew and loved, or drive a wedge between us as we argue over which version is better. For the record, I’m the grumpy old guy who argues that the original is always better … but I don’t think I ever expected to see another Mazda with a rotary engine.
      The Wankel rotary engine was a unique (if somewhat flawed) design that had last appeared in the 2012 Mazda RX8. Designed by German engineer Felix Wankel in the 1950s, various displacements of the two-rotor engine appeared in Mazda production vehicles beginning in 1967. In addition to the more familiar RX7 and RX8 sports cars, Mazda also produced roughly 15,000 rotary-powered B-series pickups from 1974-1977, and even put its tiny 1.3-liter rotary into a small bus in 1974. A prototype four-rotor engine powered Mazda to a win at LeMans in 1991.
      The rotary design is unique in that it only has three moving parts. An eccentric shaft and a pair of three-sided rotors move inside a pair of roughly oval chambers, completing the traditional Otto-cycle of intake, compression, combustion and exhaust without the use of reciprocating pistons or a valvetrain. Instead, the twin rotors spin around the eccentric shaft like a hula-hoop. The secret to the Wankel design is the geometric shape of the rotor, known as a Reuleaux triangle. The fattened triangular shape of the rotor has a constant width, always sealing the chamber in three places throughout the cycle … in theory.
      Sealing was an issue for the early Mazda rotary engines, with the apex seals at the three points of the triangle tending to fail. Like a piston ring in a reciprocating engine, the apex seal is responsible for maintaining compression throughout the cycle. This problem dogged the brand for years, but another inherent issue is in the housing design itself.
      With the intake and compression strokes occurring at the top of the oval chamber, and the combustion and exhaust events at the bottom, the housing experiences uneven heat buildup. This leads to one of the more confusing cataloging elements of the rotary Mazdas: “leading” and “trailing” spark plugs.
      Due to the heat differential between the upper and lower portions of the housing, the stock spark plugs are of different heat ranges. The leading plug (the “lower” position) is a hotter plug than the trailing (“top” position), although some enthusiasts prefer to run trailing plugs in all four positions. (Each rotor/chamber houses a pair of plugs.)
      Inability to meet increasingly strict fuel-efficiency and emissions requirements ultimately killed the original rotary engine, but in 2023, Mazda resurrected the design. A single-rotor 830cc Wankel engine can now be found in the Euro-spec MX-30 e-Skyactiv R-EV plug-in hybrid. Unfortunately for RX enthusiasts, the engine serves only as a range extender for the PHEV variant of the MX-30, powering a generator rather than powering the drivetrain directly.
      With improved compression, gasoline direct injection and an EGR system, this engine is much cleaner and efficient than previous rotaries. We’ll see if this improved technology can make its way back into the U.S. market, but for now, the European-engineered Wankel rotary engine has returned to its roots, thanks to the Mazda engineers who have believed in this funky little powerplant for nearly 60 years.
      The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view
    • By Counterman
      MAHLE Aftermarket announces the remaining two winners of the inaugural “Powered by MAHLE” Engine Giveaway.
      The winner of a 302 Ford small-block engine is based in Killingworth, Connecticut, and can look to take home an engine backed with 315 horsepower and built by the technicians at Jasper Engines & Transmissions.
      The Gen III HEMI 7.0L engine built by Moonshine Speed Shop is going to one lucky winner in Curran, Michigan. 
      “Congratulations to the winners of these premium engine parts,” said Jon Douglas, president, MAHLE Aftermarket North America. “It was awesome to be able to partner with some of our Team MAHLE members to pull together such a memorable program filled with some incredible prizes. As our inaugural ‘Powered by MAHLE’ engine giveaway comes to a close, we are very pleased with the response we have gotten from our customers and fans and want to also express our gratitude to everyone who enter our sweepstakes and made it such a success.” 
      In addition to the engine, all four winners of this year’s sweepstakes program received a one-night hotel stay and entry to the Performance Racing Industry (PRI) show in Indianapolis, which took place Dec. 7-9 at the Indiana Convention Center.
      Winners who attended this year’s PRI show also were invited to a special “meet-and-greet” with a few “Team MAHLE” partners – the likes of which included members of Kalitta Motorsports, John Force Racing, Tony Stewart Racing and others. 
      The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view
    • By Shell91
      Hi, I cannot find an engine mount ANYWHERE for my 2.4 litre 2007  Renault trafic. Can anyone point me in a direction where I can get one ? Been to an actual Renault trafic for genuine parts and the guy reckons they don’t make them anymore. 
    • By Counterman
      MAHLE Aftermarket announced the winner of the second segment of the “Powered by MAHLE” Engine Giveaway.
      The lucky winner, who is based in Missouri, has been awarded a vintage Chevrolet small-block engine (1967-2002) built by Baldwin Racing Engines of Friedheim, Missouri. The engine features all applicable premium MAHLE components. 
      The next segment of the “Powered by MAHLE” sweepstakes officially kicked off on Sept. 1 for the chance to win a Ford 302 engine with 315 horsepower and 330 foot-pounds of torque built by Jasper Engines & Transmissions.
      “The response from customers and fans continues to be extremely positive and our next giveaway – a Ford 302 – is certain to be a premium prize for your vehicle,” said Jon Douglas, president, MAHLE Aftermarket North America. “Participants still have several weeks to enter our third round of the program so there’s still ample time to get in on the action for a chance to win this awesome engine.”
      Non-winning entries for a segment will roll into the subsequent entry segments; but participants are encouraged to enter the sweepstakes on both Facebook and Instagram with a unique photo for each entry segment. The final engine-giveaway segment in this four-part promotion, will begin on Oct. 1
      In addition to the engine, winners will be provided a one-night hotel stay and entry to the Performance Racing Industry show in Indianapolis in December along with the opportunity to have dinner with “Team MAHLE” – the likes of which may include members of Kalitta Motorsports, John Force Racing, Tony Stewart Racing and others. 
      For the latest “Powered by MAHLE” updates, including  exclusive details on the remaining two segments of the program and how to enter, visit
      link hidden, please login to view and link hidden, please login to view or visit link hidden, please login to view. No purchase is necessary. Rules are available on
      link hidden, please login to view. The post
      link hidden, please login to view appeared first on link hidden, please login to view.
      link hidden, please login to view
    • A-premium Auto Parts:5% OFF with Code GM5.
    • By Buy Auto Spare Part
      Meta Description: Looking for a reliable car parts
      link hidden, please login to view Look no further! Experience top-notch services, competitive prices, positive customer reviews, and a solid warranty for all your car part needs. Enjoy the Best Services, Unbeatable Prices, Glowing Reviews, and Long-lasting Warranty  Condition: 74K, RAN GOOD Rating: 3/5 stars Warranty: 90 days Compatibility: Will fit 3.9L, VIN A, 8th digit, DOHC, 8-239 Additional Details: LH valve cover damaged, Less oil fill tube link hidden, please login to view


×
  • Create New...