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3.3
Valve Seal and Spring Replacement
3.3.1
Turn the engine so that the piston of the cylinder to be worked on is at Top Dead Centre (TDC), with both valves closed.
3.3.2
Choose the proper spark plug hose and remove the valve core from the end.
3.3.3
Thread the spark plug hose into the spark plug hole of the subject cylinder.
3.3.4
Connect the garage air supply and apply air pressure.
NOTE:
If the garage air hose uses a different quick coupler system than the spark plug hose, use the quick coupler of the VSE206 kit and attach
it to the garage air hose.
3.3.5
Replace the seals and springs as required, with the air pressure holding the valves closed.
3.3.6
Disconnect the spark plug hose at the quick coupler.
3.3.7
Carry out the same procedure on each cylinder that requires valve parts replacing.
4.
TEST RESULTS
4.1
Gauge Readings
4.1.1
On a normal cylinder, the gauge needle should travel up the scale on each compression stroke until it reaches peak value. All cylinders
should indicate a pressure that is within the vehicle manufacturer's specifications, and the reading should not vary by more than 10%
from cylinder to cylinder.
4.1.2
If the gauge needle does not travel up the scale, or if it remains at the same value for several strokes and then starts to climb, the problem
could be a valve sticking.
4.1.3
If the compression reading is considerably higher than the vehicle manufacturer's specification, the problem may be carbon build-up in
the cylinder. It may also indicate that either the piston, or the cylinder head, has been modified.
4.1.4
If a reading on two adjacent cylinders is 20 psi (or more) lower than the other cylinders, the problem may be a cracked cylinder head or
defective main gasket. Under these conditions, both coolant and oil may be found in both cylinders under these conditions.
4.1.5
If the readings are low, or vary widely between cylinders, pour a teaspoon of SAE 30 oil into each cylinder and retest them. If the readings
increase considerably, the problem may be poorly seated, or worn, piston rings. If the readings remain about the same, the valves and/or
associated components may be the problem. A burned or damaged piston may also cause the same results.
5.
COMPLETION OF TESTS
5.1
Clean, regap and reinstall the spark plugs in the same order in which they were removed, or install new spark plugs.
5.2
Reconnect each spark plug wire to the plug it was connected to prior to removal.
5.3
Return the throttle plates to the closed position.
IMPORTANT: After test, failure to return the throttle plates to the closed position before starting the engine can cause serious damage to the
"
engine.
5.4
Reconnect the ignition system wiring disconnected at paragraph 3.1.7.
NOTE: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior notice.
IMPORTANT: No liability is accepted for incorrect use of product.
WARRANTY: Guarantee is 12 months from purchase date, proof of which will be required for any claim.
INFORMATION: For a copy of our latest catalogue and promotions call us on 01284 757525 and leave your full name and address, including postcode.
Sole UK Distributor,
Sealey Group,
Bury St. Edmunds, Suffolk.
01284 757500
Web
01284 703534
e-mail
www.sealey.co.uk
sales@sealey.co.uk
VSE206 - 1 - 190706
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