Greetings,
In an effort to identify the cause of my persistent smoking at idle I finally decided to remove the head and check condition of gasket and valves.
1.Head was checked with a straight edge and passed with flying colours.
2. Head gasket has no visible signs of damage but since milege is now at 154,000 km it is due for a change.
3. Valve seals appear to be fitting snugly except for 2 inlet valves.
4. Exhaust valves are full of carbon build-up however. The plan is to clean and lap them and install with new valve seals. Guides feel snug enough.
What else should I look for at this stage that could contribute to the constant smoking?
Timing belt done recently and timing appears to be spot on as the pin slips in and out easily whilst the crank mark is lined up and the is flywheel locked in place with the tool. She fires up on the turn of the key as well.
Turbo doesn't appear to have excessive wear. Truck still smokes when I disconnect the turbo outlet when idling.
Is the carbon on exhaust valves a possible contributor or a sign? The cylinder walls are very clean and smooth. Only thing I noticed was a ring of carbon at the very top of the cylinders as well. What could this also be an indication of?
In an effort to identify the cause of my persistent smoking at idle I finally decided to remove the head and check condition of gasket and valves.
1.Head was checked with a straight edge and passed with flying colours.
2. Head gasket has no visible signs of damage but since milege is now at 154,000 km it is due for a change.
3. Valve seals appear to be fitting snugly except for 2 inlet valves.
4. Exhaust valves are full of carbon build-up however. The plan is to clean and lap them and install with new valve seals. Guides feel snug enough.
What else should I look for at this stage that could contribute to the constant smoking?
Timing belt done recently and timing appears to be spot on as the pin slips in and out easily whilst the crank mark is lined up and the is flywheel locked in place with the tool. She fires up on the turn of the key as well.
Turbo doesn't appear to have excessive wear. Truck still smokes when I disconnect the turbo outlet when idling.
Is the carbon on exhaust valves a possible contributor or a sign? The cylinder walls are very clean and smooth. Only thing I noticed was a ring of carbon at the very top of the cylinders as well. What could this also be an indication of?
