It is based on the machine with plumbers and gas fitters to check for leaks. In a two-stroke engine, the pressure test is performed to ensure that the engine has no air leakage. A leak or exhaust air in a two-stroke engine can cause improper air-fuel mixture in the engine, causing serious damage to the engine (piston seizure, detonation, etc).
Note: There is no way to ensure that the engine does not have an air leak without performing this test before starting the engine. So before you finish mount you can make this check and know if we have any leaks by crankshaft seals or other party and fix the problem.
How the test is performed?
For pressure testing engine, we will need some special and simple mechanisms. Cylinder, cylinder head, box blade, spark plug, etc., must be all installed and tightened correctly except the exhaust and carburetor. (unassembled also we leave the party and clutch on to have crankshaft seals in sight).
How the test is performed?
For pressure testing engine, we will need some special and simple mechanisms. (See below detail the instructions for building your own tester to perform the test pressure to test the engine. Cylinder, cylinder head, box blade, spark plug, etc., must be all installed and tightened correctly except the exhaust and carburetor.
We must make a steel plate or aluminum housing exact size of the exhaust and also manufacture a rubber gasket of the measure which is housed in the cylinder base to prevent leakage. If the engine has more than one cylinder, must cover all tailpipes with this system.
In making carburetor tester pressure will be placed. The pressure gauge shall be screwed into a piece of Teflon or other material and can be constructed to be set to enter the carburetor decision, remember that it can not leak. (It can be placed with a shot rubber clamps as if it were a more effective and simple carburetor perhaps). If the engine has more than one cylinder must plug the other shots carburetor. In some engines may be necessary to plug the vent hose transmission.
Once the gauge is 6 pounds of pressure is fixed and is expected for about 6 minutes after that time should not be lowered any pressure.
If the pressure drops, you have to moisten with soapy water seams and joints of the engine parts (crankcase crankcase, cylinder-crankcase, cylinder head, seals, spark etc. ..) where there is an air leak will bubble.If after six minutes samples no loss in pressure, pressure equipment is disassembled and continue with the motor assembly.
Construction of the pressure tester
All parts can be found in any store dedicated to the sale of materials Tyres (Compressors, Hoses for guns etc ...) and the price is small most expensive is the gauge but as low pressure is not expensive & you should make it be able to do depending on the brand gauge.
small sheet steel or aluminum to cover the escape.
Sheet rubber material for the board
Cut the sheet to fit and make bolt holes to screw into the cylinder. Do the same with the rubber seal.
Place the plate in place. Use a small amount of fat on the board to help make the final seal and tight. (If you have a useless old escape, you can take advantage of cutting the elbow as close to the cylinder, about 2 cm long, and taponarlo with a plate welded so you will be guaranteed that you will not have leaks and served in that engine to carry out all checks we want).
Pressure Tester
Materials:
PVC pipe snugly into the intake port (or the outer diameter of the intake port to attach them to a wall tight with clamps rubber personally prefer this way because a tube inside the other is easier to have and performing leakage is also simpler)
A between-threaded plastic tube 3/4 x 1 inch.
A tube fitting 03.04 (body) having the female threaded 3/8 for the manometer housing and a housing for the air valve at the other end (the valve must have backstop, a valve tire it perfectly or else buy one with the mechanical seal through a nut to remove air from the engine easier (with the valve of a tire we must have pressed the "shell" or disarm, it would be the only drawback).
A low pressure gauge air.
Teflon plumber or anaerobic sealant to seal the threads. Assemble all the elements according to the picture on the left, using thread sealant on all threaded joints.
Note: There is no way to ensure that the engine does not have an air leak without performing this test before starting the engine. So before you finish mount you can make this check and know if we have any leaks by crankshaft seals or other party and fix the problem.
How the test is performed?
For pressure testing engine, we will need some special and simple mechanisms. Cylinder, cylinder head, box blade, spark plug, etc., must be all installed and tightened correctly except the exhaust and carburetor. (unassembled also we leave the party and clutch on to have crankshaft seals in sight).
How the test is performed?
For pressure testing engine, we will need some special and simple mechanisms. (See below detail the instructions for building your own tester to perform the test pressure to test the engine. Cylinder, cylinder head, box blade, spark plug, etc., must be all installed and tightened correctly except the exhaust and carburetor.
We must make a steel plate or aluminum housing exact size of the exhaust and also manufacture a rubber gasket of the measure which is housed in the cylinder base to prevent leakage. If the engine has more than one cylinder, must cover all tailpipes with this system.
In making carburetor tester pressure will be placed. The pressure gauge shall be screwed into a piece of Teflon or other material and can be constructed to be set to enter the carburetor decision, remember that it can not leak. (It can be placed with a shot rubber clamps as if it were a more effective and simple carburetor perhaps). If the engine has more than one cylinder must plug the other shots carburetor. In some engines may be necessary to plug the vent hose transmission.
Once the gauge is 6 pounds of pressure is fixed and is expected for about 6 minutes after that time should not be lowered any pressure.
If the pressure drops, you have to moisten with soapy water seams and joints of the engine parts (crankcase crankcase, cylinder-crankcase, cylinder head, seals, spark etc. ..) where there is an air leak will bubble.If after six minutes samples no loss in pressure, pressure equipment is disassembled and continue with the motor assembly.
Construction of the pressure tester
All parts can be found in any store dedicated to the sale of materials Tyres (Compressors, Hoses for guns etc ...) and the price is small most expensive is the gauge but as low pressure is not expensive & you should make it be able to do depending on the brand gauge.
small sheet steel or aluminum to cover the escape.
Sheet rubber material for the board
Cut the sheet to fit and make bolt holes to screw into the cylinder. Do the same with the rubber seal.
Place the plate in place. Use a small amount of fat on the board to help make the final seal and tight. (If you have a useless old escape, you can take advantage of cutting the elbow as close to the cylinder, about 2 cm long, and taponarlo with a plate welded so you will be guaranteed that you will not have leaks and served in that engine to carry out all checks we want).
Pressure Tester
Materials:
PVC pipe snugly into the intake port (or the outer diameter of the intake port to attach them to a wall tight with clamps rubber personally prefer this way because a tube inside the other is easier to have and performing leakage is also simpler)
A between-threaded plastic tube 3/4 x 1 inch.
A tube fitting 03.04 (body) having the female threaded 3/8 for the manometer housing and a housing for the air valve at the other end (the valve must have backstop, a valve tire it perfectly or else buy one with the mechanical seal through a nut to remove air from the engine easier (with the valve of a tire we must have pressed the "shell" or disarm, it would be the only drawback).
A low pressure gauge air.
Teflon plumber or anaerobic sealant to seal the threads. Assemble all the elements according to the picture on the left, using thread sealant on all threaded joints.
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