Rejuvenating makeover for older engines

Published:  05 November, 2018

LIQUI MOLY Injection Cleaner frees the engine from deposits and restores its original performance. It is simply poured into the fuel tank. Every time the engine is running, the cleaning ingredients, together with the gasoline, get into the injection system and disintegrate the encrustations. The dissolved dirt is burnt in the engine and emitted together with the exhaust gases. The combustion chamber becomes clean again. In the event of tough dirt it can become necessary to use a can of Injection Cleaner for several refuelling processes in a row. Injection Cleaner can also be used preventively: One can every 2,000 kilometers ensures that new deposits cannot form in the first place.

www.liqui-moly.com

Related Articles

  • WIN with LIQUI MOLY 

    With around 4,000 items, LIQUI MOLY offers a global, uniquely broad range of automotive chemicals: Motor oils and additives, greases and pastes, sprays and car care, glues and sealants. Founded in 1957, LIQUI MOLY develops and produces exclusively in Germany. There it is the undisputed market leader for additives and is repeatedly voted the best oil brand. The company sells its products in more than 120 countries.

  • LIQUI MOLY to sponsor World Handball 

    LIQUI MOLY is continuing to expand its sport sponsorship: the company is now also the official sponsor of the 2019 World Handball Championship, which is will take place in Denmark and Germany in January. "This world championship is one of our global lead sponsorships," says Peter Baumann, Marketing Director at LIQUI MOLY.

  • Schaeffler (UK) and Liqui Moly combine on Chain Protect 

    Schaeffler (UK) has teamed up with Liqui Moly to offer  Chain Protect, an additive which helps ensure the longevity of the timing chain and its associated components. The crucial element of any timing chain replacement is the ‘breaking-in’ phase, when the new chain beds itself in to the old engine system. Using Chain Protect can help ease wear during this phase by up to 20%. During the installation of an INA timing chain KIT, a technician should apply Chain Protect to the timing chain and associated components. This helps create a robust layer on all point of contact surfaces, resulting in smoother chain function and reduced friction.
    www.repxpert.co.uk

  • Schaeffler (UK) and Liqui Moly combine on Chain Protect 

    Schaeffler (UK) has teamed up with Liqui Moly to offer  Chain Protect, an additive which helps ensure the longevity of the timing chain and its associated components. The crucial element of any timing chain replacement is the ‘breaking-in’ phase, when the new chain beds itself in to the old engine system. Using Chain Protect can help ease wear during this phase by up to 20%. During the installation of an INA timing chain KIT, a technician should apply Chain Protect to the timing chain and associated components. This helps create a robust layer on all point of contact surfaces, resulting in smoother chain function and reduced friction.
    www.repxpert.co.uk

  • 888... Lucky for some 

    With this month’s focus in Aftermarket on cooling, I thought a look at how technology has affected one of the oldest systems of the internal combustion engine. For illustration, I have chosen the Volkswagen Auto Group’s en888 engine, built in Mexico, Hungary and China hence the 888 insignia; It is their lucky number.

    Its one of Audi’s high-performance variants. Its fitted in my Seat Cupra 2ltr, producing 400bhp with stock mechanicals. So, what are the benefits of advanced cooling systems? Heat derived from combustion, transferred by conduction and convection into cooling and the environment is in effect wasted energy. Controlling and where necessary containing it improves efficiency, not forgetting reductions in emission pollution.

    Efforts
    They have made stringent efforts in the mechanical design of the 888 to achieve savings in efficiency. Reducing engine weight, minimising internal friction, increasing power and torque, current with fuel economy initiatives.

    The cylinder block wall is reduced from 3.5mm to 3.00mm. Internal friction is reduced with smaller main bearing journals, revised timing chain design, incorporating a dual pressure lubricating system. The balance shaft has roller bearings, piston cooling jets further improve thermal stability. The jets have PCM mapped control, while extra oil cooling is provided adjacent the filter housing, close to the activation solenoid and twin oil pressure sensors.

    The engine can theoretically reach Lambda 1 from cold within 20-30 seconds.

    Further technical innovations include reduced oil level, reduced tension force in the auxiliary chain mechanism, down shifting achieved with variable valve lift and twin scroll direct mount turbo design.

    Advances
    You will now appreciate that it is no longer possible to separate mechanical design, power delivery, emissions, and all-round efficiency, treating cooling as an afterthought.

    Take the cylinder block design, which possibly has the biggest advances reserved within the cylinder head and coolant control module (water pump). The exhaust manifold is housed completely within the cylinder head casting. This ensures very effective conductance of heat. The emphasis is now on increase, maintain, reduce, thanks to an advanced dual valve PCM controlled coolant control module. The module is mounted at the rear of the engine block, belt-driven with a cooling fan to keep the belt cool.
    By manipulating the two rotary valves, flow and temperature can be effectively controlled within very carefully controlled limits. The rotary valves are manipulated by a PWM 1000hz motor with SENT position feedback (single edge nibble transmission), a method used by the latest air mass meters.

    Heat transfer into and from the turbo is much more efficient due partly to the direct mount and integrated cooling galleries surrounding the exhaust tracts.

    The piston to wall clearance has been increased, with a special coating on the piston thrust side complimenting a direct gudgeon pin to rod contact, the DLC coating removes the need for a bearing bush.

    The cylinder head porting incorporates ignition sequence separation, thus ensuring preceding exhaust pulses do not impede the energy from the current. This in combination with advanced turbine design further improves torque range and downshifting. Cooling control priority is applied to the occupants, then the transmission, further reducing frictional losses.

    Complexity
    Although not directly related to the cooling system, a dual injection system is fitted with its main function being emission reduction. Cold start is provided with three direct injection events, followed by port injection warm up. These systems do not run in tandem. Two thirds of the load range is controlled by port injection, with full load above 4,000 rpm delivered by induction stroke direct fuel delivery.

    From a practical point of view, previous low-tech tasks like replacing coolant components and bleeding now requires electronic support through the serial interface. Using the correct antifreeze is now essential if premature corrosion is to be avoided. As a warning, capillary coolant invasion within wiring looms is well known in some French and GM vehicles, as some of you will be aware.
    It is also worth mentioning that Volkswagen has modified the software controlling cooling in some of their diesel vehicles as part of the emission recall programme.

    Predictably due to their complexity, I can foresee cooling systems being neglected during routine servicing , so expect to see faults as these systems age in the pre-owned market.


Most read content


Search

Sign Up

For the latest news and updates from Aftermarket Magazine.


Poll

Where should the next Automechanika show be held?



Facebook


©DFA Media 1999-2018