Advertisement
4.2.
connecting the system
4.2.1.
run the engine until it reaches operating temperature.
4.2.2.
remove spark plugs, oil dipstick, radiator cap, air filter from carburettor or, if fuel injected, remove air filter or hose from the
throttle body.
4.2.3.
position no.1 piston at tdc on the compression stroke so that both inlet and exhaust valves are closed. note: Always rotate the
engine in the normal operating direction. to position the piston correctly use a piston position gauge and remove the cam/rocker
cover so that closed valves can be confirmed.
4.2.4.
screw the cylinder hose (see 'c' in parts diagram) into the spark plug hole. if connecting to a 10 or 12mm thread, use adaptors 9 or 10
as appropriate. do not connect to the tester until the leakage gauge (6) has been calibrated.
4.2.5.
screw a 1/4"bspt male air line connector fitting into the threaded hole on the side of the regulator (connector not supplied).
turn the regulator knob on the tester fully anti-clockwise to shut down the regulator before connecting the air. connect the
compressed air, which must be between 45 and 100psi, to the regulator.
4.2.6.
calibrate the leakage gauge by turning the regulator knob clockwise until the needle on the right hand gauge reaches zero at the end
of the yellow 'set' band. (typically, this will happen between 15 to 20psi). now insert connector 'A' on the cylinder hose into connector
'b' on the tester hose. Any leakage present in the currently connected cylinder will show on the cylinder leakage gauge as a percentage
loss. A cylinder that is not leaking will read approximately 20% in the green band.
4.2.7.
test all other cylinders, each at tdc, and compare the leakage figures to determine which cylinders are faulty.
4.2.8.
if necessary, retest the cylinder(s) showing high leakage. check the listening points (see 4.1) to determine the cause of the leakage.
4.3.
Helpful suggestions.
4.3.1.
if 90-100% of excessive leakage shows on gauge the cylinder may not be at tdc on the compression stroke. check to ensure that
the valves are closed. Always try to position piston at tdc for uniform results. it is unlikely that the gauge will read 100% leakage on
the gauge due to the internal bore of the flexible hose which will restrict air flow slightly.
4.3.2.
if rings are broken or cylinder walls are scored excessive leakage will be identified.
4.3.3.
it is important that all cylinders have reasonably uniform readings (as in compression testing). differences in excess of 15% indicate
excessive leakage.
4.3.4.
large engines tend to leak more than small engines.
4.3.5.
if leak is excessive on a vehicle with low mileage, piston rings may be stuck. treat engine with quality tune-up oil for a period of time
and then re-test before disassembling.
4.3.6.
the lower the pitch of the leakage sound, the greater the leak.
4.3.7.
to assist with listening use a length of clean hose, or a mechanic's stethoscope with the probe removed.
4.3.8.
When making repeat tests on the same cylinder, variations in the piston position and engine temperature can cause gauge
readings to differ by up to 10%.
4.3.9.
if an engine has multiple faults (such as worn rings and burned valves), the tester may indicate only the most serious fault.
note: there is always some leakage past the piston rings. As a result you will always hear some leakage when listening to the dipstick
tube.
iteM
Part nO:
2
Vse2020.V3-02
3
Vse2020.V3-03
4
Vse2020.V3-04
5
Vse2020.V3-05
6
Vse2020.V3-06
7
Vse2020.V3-07
8
Vse2020.V3-08
9
Vse2020.V3-09
10
Vse2020.V3-010
11
Vse2020.V3-011
recycle unwanted materials instead of disposing of them as waste. all tools, accessories and packaging should be sorted,
taken to a recycling centre and disposed of in a manner which is compatible with the environment.
When the product becomes completely unserviceable and requires disposal, drain off any fluids (if applicable)
into approved containers and dispose of the product and the fluids according to local regulations.
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 this product.
Warranty: Guarantee is 12 months from purchase date, proof of which will be required for any claim.
© jack sealey limited
descriPtiOn
pressure
reGulAtinG VAlVe
VAlVe
Hose
pressure GAuGe
pressure GAuGe
connector
(femAle)
Hose WitH
connector
connector
connector
o-rinG
sole uK distributor, sealey Group.
Kempson Way, suffolk business park,
bury st. edmunds, suffolk.
ip32 7Ar
Original Language Version
environmental Protection
01284 757500
01284 703534
www.sealey.co.uk
Web
sales@sealey.co.uk
Vse2020.V3 | issue 1 23/12/16
Advertisement
