Brid
2nd August 2010, 08:40 AM
Most cold start problems can be improved, if not completely rectified, by improving internal cleanliness and optimizing cylinder compression and combustion efficiency. This thread doesn't discuss mechanical factors, such as cranking speed, tune, etc.
Cold weather starting becomes increasingly more difficult as engine deposits build up over time. Types of operation, such as excessive idling, short run time, light work and city type driving, all contribute to deposit formation which can result in poor cold start. All these operating conditions do not allow efficient combustion of the diesel or petrol. In addition, poor maintenance and general age will also contribute to deposit build up.
Typically, deposits build up in several critical regions...
· Injector tips. This prevents optimum fuel spray atomization, as well as distorting the spray pattern.
· Cylinder glaze. This is a fine build up which fills the cylinder cross hatching with fine carbon, making the bore glassy smooth, and reducing cylinder compression and increasing blow by. Good compression is essential for cold starts.
· Piston ring deposits. This also reduces crucial cylinder compression.
· Combustion and exhaust deposits. Carbon build up in combustion spaces, esp on piston crowns interferes with efficient mixing of the fuel spray with the air. Exhaust deposits reduce the engine’s ability to breathe efficiently.
· Sludge and gummy piston rings. Apart from increasing internal drag, which adversely affects cold cranking and efficient lubrication, loss of compression can be quite severe.
Rather than carrying out expensive mechanical work to physically remove, clean and replace affected parts (or effectively overhaul) engines and fuel systems, all of the above mentioned deposit types can be removed by safe chemical means, and with minimal downtime. In fact, much of the clean up occurs during actual, normal driving.
Our FTC Decarbonizer is unique in its action to deglaze and de-coke engines. At the same time, it acts as a combustion catalyst to ignite fuel much easier during cold starts. It also burns off carbon from combustion and exhaust spaces at much lower temperatures than otherwise possible. So, even during adverse engine operating conditions, it burns off deposits such as cylinder glaze, combustion and exhaust deposits, even turbocharger deposits.
In doing so, removal of cylinder glaze & some top ring carbon will improve cylinder compression in sound engines.
The figures below are from a Diahatsu Rocky diesel...
Before (PSI) 400, 390, 390, 400
After FTC 460, 440, 440, 450
...a classic case of compression loss due to piston/cylinder deposits.
Regards
Brid
Australia Wide Delivery
COST EFFECTIVE MAINTENANCE
Ph 07 3376 6188
sales@costeffective.com.au
Cost Effective Maintenance - Home (http://www.costeffective.com.au)
Cold weather starting becomes increasingly more difficult as engine deposits build up over time. Types of operation, such as excessive idling, short run time, light work and city type driving, all contribute to deposit formation which can result in poor cold start. All these operating conditions do not allow efficient combustion of the diesel or petrol. In addition, poor maintenance and general age will also contribute to deposit build up.
Typically, deposits build up in several critical regions...
· Injector tips. This prevents optimum fuel spray atomization, as well as distorting the spray pattern.
· Cylinder glaze. This is a fine build up which fills the cylinder cross hatching with fine carbon, making the bore glassy smooth, and reducing cylinder compression and increasing blow by. Good compression is essential for cold starts.
· Piston ring deposits. This also reduces crucial cylinder compression.
· Combustion and exhaust deposits. Carbon build up in combustion spaces, esp on piston crowns interferes with efficient mixing of the fuel spray with the air. Exhaust deposits reduce the engine’s ability to breathe efficiently.
· Sludge and gummy piston rings. Apart from increasing internal drag, which adversely affects cold cranking and efficient lubrication, loss of compression can be quite severe.
Rather than carrying out expensive mechanical work to physically remove, clean and replace affected parts (or effectively overhaul) engines and fuel systems, all of the above mentioned deposit types can be removed by safe chemical means, and with minimal downtime. In fact, much of the clean up occurs during actual, normal driving.
Our FTC Decarbonizer is unique in its action to deglaze and de-coke engines. At the same time, it acts as a combustion catalyst to ignite fuel much easier during cold starts. It also burns off carbon from combustion and exhaust spaces at much lower temperatures than otherwise possible. So, even during adverse engine operating conditions, it burns off deposits such as cylinder glaze, combustion and exhaust deposits, even turbocharger deposits.
In doing so, removal of cylinder glaze & some top ring carbon will improve cylinder compression in sound engines.
The figures below are from a Diahatsu Rocky diesel...
Before (PSI) 400, 390, 390, 400
After FTC 460, 440, 440, 450
...a classic case of compression loss due to piston/cylinder deposits.
Regards
Brid
Australia Wide Delivery
COST EFFECTIVE MAINTENANCE
Ph 07 3376 6188
sales@costeffective.com.au
Cost Effective Maintenance - Home (http://www.costeffective.com.au)