Portable device (A) and stationary (B) for mounting and dismounting engine valves
One of the tools is to compress the valve springs, remove the released crackers, valve springs with plates and support washers. Turn the cylinder head and remove the valves from the underside. Remove oil seals from guide bushings. The valves are installed in the reverse order.
Mandrel for installing valve stem seals on valve guides
Metal brush driven by an electric drill - to remove carbon deposits from the combustion chambers of the cylinder head and from the surface of the exhaust valves.
Gauge for measuring the depth of the combustion chamber of the cylinder head
This operation is performed as shown in the figure if the head has been ground due to deformation.
Device for grinding the working chamfers of valve seats
1 spindle
2 Grinding wheel
3 Guide rod
Tool for dressing grinding wheels
Valve seat chamfer tool
1 spindle
2 Cutters
3 Guide rod
Grinding machine for grinding the working chamfers of valves
To do this, it is necessary to install a valve on the grinding machine and fix the movable support so as to obtain the required chamfer angle.
1 Valves
2 Grinding wheel
3 Lever
Mandrel for pressing out valve guides and mandrels for pressing these bushings
The clearance between the valve guides and the valve stem is checked with an indicator or the diameter of the valve stem and the bore of the valve guide is measured.
If it is impossible to provide the required clearance when replacing the valve, then it is necessary to replace the valve bushings with mandrels.
Valve guide reamer kit
After pressing the guide bushings, it is necessary to bring their diameters to the nominal dimensions by reaming the intake valves and exhaust valves.
Devices for testing engine valves for tightness
To do this, carefully clean the seats and valves and install the cylinder head on a stand (3). Insert the valves into their respective guide bushings and close the spark plug holes with plugs (4). Install the device (2) into position. indicated in the figure. Strongly press the lever and blow air with a rubber bulb until. until the pressure gauge shows a pressure of 50 kPa. No drop in pressure should be observed within 10 seconds. If the pressure drops, i.e. air leaks, it is necessary to repeat the grinding of the valve face and seat on the cylinder head.
Device for hydraulic testing for tightness of the cooling jacket of the cylinder head
And the water supply
1, 2, 3 Plugs
4 Stove
5 Flange with water connection
To do this, it is necessary to install the parts included in the fixture kit on the head, connect the pump to the tap and supply them with water inside the head at a pressure of 0.5 MPa. There should be no water leakage from the block head within 2 minutes. If cracks are found, the cylinder head must be replaced. The tightness of the cylinder head can also be checked with compressed air. To do this, instead of water, you need to supply compressed air at a pressure of 0.15-0.2 MPa, lower the cylinder head into a bath of water heated to 60°-80°C, and warm it up for 5 minutes. Within 1-1.5 minutes, air etching from the head should not be observed.
torque wrench - for technologically correct tightening of fasteners.
Tightening the engine flywheel bolts with a torque wrench is shown in the figure.
probe- to check the clearance between the valve drive lever and the camshaft cam.
Sound indicator for determining the compression stroke in the engine cylinder
To install an ignition distributor on the engine or to check and set the ignition timing with a test light, it is necessary to determine the compression stroke in the first cylinder. To do this, unscrew the candle of the first cylinder, close the hole for the candle with a paper cork or a cork of a sound indicator, consisting of a wooden cork, a rubber hose and any whistle that you can make yourself, turn the crankshaft with the start handle and push the paper cork out of the candle socket or along the sound of the whistle to determine the compression stroke in the cylinder.
1, 2 plates
3 Plug
Visitor comments