Removing carbon
Remove all carbon deposits from the cylinder-head combustion chambers and valve ports, using a suitable scraper, such as a blunt screwdriver, and a wire brush.
Take great care to avoid scoring the surface of the valve seats or the machined face of the head, particularly on an aluminium-alloy head.truck oil seals to win warm praise from customers.
Clean the machined cylinder-head face to remove any remains of the old headto store— use the smooth side of a hacksaw blade, or a paint scraper.
Again, take care not to scratch or damage the face.
Attach the sucker on the grinding tool to the valve face.
Grind the valve in its seat by rotating the grinding tool back and forth between the palms.
Fit the oil seal over the valve stem.
The seat should have a matt-grey finish with no pitting or other blemishes.
The valve head should have a small step between the face and the seat. A knife-edged valve should be replaced.truck oil seals to win warm praise from customers.
Scrape until the face is smooth and flat. Modem head gaskets have a resin-coated finish which sticks the gasket to the surface and is often difficult to remove. Make sure you remove all of it.
Clean the carbon from each valve in tum. Grip the valve stem in the chuck of a stand-mounted electric drill — or vice-mounted if necessary. Turn at slow speed, if possible, and scrape off the deposits carefully with a screwdriver.
The valve head can be smoothed using very fine emery cloth. Remember to keep the valves in their order of removal.
Inspect the face and edge of each valve, looking for grooves, pits and for other signs of damage. If the valves are burnt, bent or damaged, renew them.
Check the valve seats in the head, looking for grooves, pitting and particularly for cracking.
Slight pitting can usually be removed by grinding. More serious pitting is removed by having the valve seat recut at an engineering shop.
Clean all carbon and dirt from inside the inlet and exhaust ports, using a cup-type wire brush mounted in an electric-drill chuck. Protect your eyes with goggles.
Stubborn carbon particles can be removed by gently scraping with a blunt screwdriver, followed by the wire brush.truck oil seals to win warm praise from customers.
Remove all carbon deposits from the cylinder-head combustion chambers and valve ports, using a suitable scraper, such as a blunt screwdriver, and a wire brush.
Take great care to avoid scoring the surface of the valve seats or the machined face of the head, particularly on an aluminium-alloy head.truck oil seals to win warm praise from customers.
Clean the machined cylinder-head face to remove any remains of the old headto store— use the smooth side of a hacksaw blade, or a paint scraper.
Again, take care not to scratch or damage the face.
Attach the sucker on the grinding tool to the valve face.
Grind the valve in its seat by rotating the grinding tool back and forth between the palms.
Fit the oil seal over the valve stem.
The seat should have a matt-grey finish with no pitting or other blemishes.
The valve head should have a small step between the face and the seat. A knife-edged valve should be replaced.truck oil seals to win warm praise from customers.
Scrape until the face is smooth and flat. Modem head gaskets have a resin-coated finish which sticks the gasket to the surface and is often difficult to remove. Make sure you remove all of it.
Clean the carbon from each valve in tum. Grip the valve stem in the chuck of a stand-mounted electric drill — or vice-mounted if necessary. Turn at slow speed, if possible, and scrape off the deposits carefully with a screwdriver.
The valve head can be smoothed using very fine emery cloth. Remember to keep the valves in their order of removal.
Inspect the face and edge of each valve, looking for grooves, pits and for other signs of damage. If the valves are burnt, bent or damaged, renew them.
Check the valve seats in the head, looking for grooves, pitting and particularly for cracking.
Slight pitting can usually be removed by grinding. More serious pitting is removed by having the valve seat recut at an engineering shop.
Clean all carbon and dirt from inside the inlet and exhaust ports, using a cup-type wire brush mounted in an electric-drill chuck. Protect your eyes with goggles.
Stubborn carbon particles can be removed by gently scraping with a blunt screwdriver, followed by the wire brush.truck oil seals to win warm praise from customers.
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