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Fiat 500 USA Forum - DICorse http://www.fiat500usaforum.com/ Chipbox, DNA Racing, Accessories, Maintenance/Replacement parts, service. en Wed, 06 Jul 2022 01:04:46 GMT vBulletin 30 http://www.fiat500usaforum.com/images/misc/rss.png Fiat 500 USA Forum - DICorse http://www.fiat500usaforum.com/ Last post http://www.fiat500usaforum.com/showthread.php?39480-Last-post&goto=newpost Sat, 02 Jul 2022 00:30:38 GMT We will no longer be advertising on this forum. I thank you for all of your support and loyalty to the brand. Sincerely Bob Zecca ...
We will no longer be advertising on this forum.
I thank you for all of your support and loyalty to the brand.
Bob Zecca
DICorse RobertZecca http://www.fiat500usaforum.com/showthread.php?39480-Last-post
Fiat 500 non turbo oil change kit http://www.fiat500usaforum.com/showthread.php?39479-Fiat-500-non-turbo-oil-change-kit&goto=newpost Sat, 02 Jul 2022 00:27:32 GMT https://www.dicorse.com/shop/dicorse-motorsport-wheel-spacer-kit-fiat-500-abarth/
DICorse RobertZecca http://www.fiat500usaforum.com/showthread.php?39479-Fiat-500-non-turbo-oil-change-kit
Facebook page Marketplace Abarth North America http://www.fiat500usaforum.com/showthread.php?39471-Facebook-page-Marketplace-Abarth-North-America&goto=newpost Thu, 30 Jun 2022 16:35:34 GMT Please join this page: ...
Please join this page: https://www.facebook.com/groups/1709...eric&ref=notif

You can buy or sell almost anything from a pool of over 3,000 members.

This page has a discussion group that will educate you as well.
DICorse Robert Zecca http://www.fiat500usaforum.com/showthread.php?39471-Facebook-page-Marketplace-Abarth-North-America
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DICorse Robert Zecca http://www.fiat500usaforum.com/showthread.php?39470-INCOMING-Officially-Licensed-Abarth-shoes!
BURNT Valves Causes and prevention http://www.fiat500usaforum.com/showthread.php?39469-BURNT-Valves-Causes-and-prevention&goto=newpost Thu, 30 Jun 2022 15:21:41 GMT In the past 3 years or so we have seen many cases of burnt valves in our engines. This can be caused by bad fuel, tunes, wrong oil, etc.......many...
In the past 3 years or so we have seen many cases of burnt valves in our engines. This can be caused by bad fuel, tunes, wrong oil, etc.......many things can lead to them. Our cars running extremely hot and we experience this more than other makes because of our small compartment, turbo etc......

Here is a statement from MOTUL that may give you insight to Burnt Valves.

One of the goals of DICorse is to educate you. We are not the experts in every facet of the field but we will try to find out the correct information and share it with you. This helps you to properly maintain your car for years to come.

]I want to thank Motul for taking the time to educate us. I love dealing with them because they not only produce a great product but their people support us as needed. We have questions....they have answers.

Burnt valves usually occur when the valve can no longer seal correctly due to extreme temperatures damaging the valve’s material. It is important to note that some causes can produce burnt valves on their own, while for others, it is a combination of several causes that eventually results in a burnt valve.

  • The concentration of combustion gases escaping past the valve at one point.
  • Incorrect valve clearance can endanger the valve sealing and cause it to burn.
  • Excessive localized heat.
  • Weak valve springs.
  • Incorrectly set tappets. This can be confirmed before the strip down. Hydraulic tappet depression should be checked too.
  • Incorrectly cut seat. The position of a seat contact of a valve should be around 1 to 1.5 mm away from the valve margin.
  • You have incorrectly faced valves. You can check the face finish to ensure it is okay, and without any chatter or flats. Check out for the correct face angle and valve run out.

An irregular valve sealing with the cylinder head valve seat.

  • Carbon residues generated by poor mixture (irregular combustion) appears at the seat region and put the sealing between the valve and its seat at risk.
  • Running a dry fuel like L.P.G causes inadequate lubrication of the valve seat resulting in the valve seat failing to and consequently the valves.
  • Another factor is deficient refrigeration due to partial obstruction of the cylinder head cooling. This results in the valve cooling inadequately.

Exhaust valves are more prone to burning as they run hotter than the intake valves, between 1,200- and 1,350-degrees Fahrenheit. Most of the time, when they burn, they cause a loss in compression.

The burnt valve is a common car tribulation experienced by car owners. However, you can save the exhaust valve from burning if you discover the symptoms before it is destroyed completely. Experts suggest getting familiar with burnt valve symptoms to ensure that you detect them before the problem becomes bigger.

What Are the Symptoms of a Burnt Valve?

Poor Engine Performance

A burnt valve causes reduced performance of the engine. They often have huge holes leaking out all the gases, eventually reducing compression resulting in the engine’s poor performance. Chances of burning the valves if other compression problems are not fixed are very high.

Misfiring is a term used when the cylinder in the engine does not discharge the required amount of fire. Good compression, the right spark at the right time, and a proper mixture of air and fuel re essential for the cylinder to work properly. Typical signs of misfires include steering vibration, the engine shaking while idle, or if the engine experiences difficulties to start or stalls when starting. Misfiring could also mean losing compression if it occurs when the cylinder loses a large part of fuel and air mixture before ignition. If not for a blown head gasket or misfires due to loss of compression, then there is a burnt valve.

Complexity in Starting the Car
A car cannot start as it should if the valve is burnt. A burnt valve does not let the car to gas up the way it should. The car may eventually start, but this is still an indication that you should check your valves.

Power Loss
Loss of power is an indication of a burnt exhaust valve. It is linked to ignition misfires since a misfiring cylinder causes up to 25 percent of power loss problems.

Puffing or Puttering Sound.
A burnt exhaust valve often makes puffing or puttering sounds. Some people refer to it as a chuff- chuff sound. The sound usually goes off every time the cylinder tries to fire. There is a trick that car owners can hold a dollar bill and let it flap over the exhaust pipe. If it is sucked in, it most likely means that the exhaust valve is burnt.

Failed Emission Test
The engine will blow hydrocarbons out of the tailpipe if the exhaust valve is burnt. This is a major cause for many vehicles to fail emission tests. If your car fails this test, then it is time to check your exhaust valve.

Having exhaust valves that are functioning properly is important for automobile maintenance as exhaust valves that function poorly lead to poor oil consumption, compression leaks, valve train noise, and complete valve failure.

Here are ways to help you prevent a burnt valve.

  • Use good quality fuel to help prevent carbon build-up on the valve seats.
  • Have your mechanic check to make sure that the valve clearances are within specification.
  • If your vehicle uses the L.P.G fuel system, make sure the engine is L.P.G compatible since most of them are not. Valve failure is inevitable if the engine is running L.P.G (Liquefied petroleum gas) but isn’t L.P.G compatible. It is generally less costly to remove the cylinder head and modify it for L.P.G before the valves begin to burn than to wait until the damage is done. Once completed, it will be safe to use the modified L.P.G without fear of damaging the engine.
  • Maintain a clean and efficient cooling system so that your engine doesn’t run too hot.

Considering that exhaust valves are more susceptible to burning, how can you cool down the exhaust valve?

  • Provide a suitable number of jets on the channel through which cold water direct from the radiator is pumped. The water flowing from these jets or nozzles comes in contact with the areas adjacent to the exhaust port and the exhaust valve, which are then cooled.
  • Improved cooling can also be achieved if cooling jackets are provided elaborately near the exhaust port and exhaust valve.
  • You can also achieve better cooling by filling part of the exhaust valve stem with sodium. The sodium melts at a high temperature of about 150 degrees centigrade. The motion of the exhaust valve throws it up and down. The heat from the hot regions is then conveyed to the comparatively colder regions. Sodium has a high boiling point and is a very good conductor of heat.

It is very unusual to burn an intake valve. Unlike the intake valve, which has the cool intake charge flowing over its head, the exhaust valves burn because they have hot exhaust gases flowing over their head. A burnt valve reduces the general performance of the vehicle and poor fuel consumption. Continual driving with a burnt valve causes a lot more damage to the engine and will cost more to repair in the long run.

One solution is treating your fuel system with this 4-6 times a year. It will lubricate clean your injectors and lubricate your valves and valve guides in the hopes of reducing carbon buildup on your valves which lead to a burnt valve.


At DICorse we feel it our obligation to educate you as we find and see issues come into our shop. We all learn from this and hopefully save you money from preventative maintainance.


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DICorse Robert Zecca http://www.fiat500usaforum.com/showthread.php?39469-BURNT-Valves-Causes-and-prevention
Touch up paint for your car! http://www.fiat500usaforum.com/showthread.php?39451-Touch-up-paint-for-your-car!&goto=newpost Tue, 21 Jun 2022 19:48:19 GMT I came across this company that specializes in inexpensive touch up paint kits for our cars/motorcyles. They are based out of the UK but just opened...
I came across this company that specializes in inexpensive touch up paint kits for our cars/motorcyles. They are based out of the UK but just opened operations in the US.

www.chipex.com or www.touchuppaintfactory.com
DICorse Robert Zecca http://www.fiat500usaforum.com/showthread.php?39451-Touch-up-paint-for-your-car!