Fig.1 – Sealey VSE953 User Manual
Page 2
Fig.1
Original Language Version
© Jack Sealey Limited
VSE953 Issue 1 - 19/06/13
3.4
VACUUM TEST
3.4.1. Use the supplied adaptors (see section 4.4, 4.5) to connect gauge as close to the inlet manifold as possible, ensure that the hose is not
kinked.
Should an engine have two inlet manifolds carry out separate tests on each manifold.
3.4.2. Start engine, if required adjust idle speed to obtain a smooth tick over. If the gauge needle remains steady with a reading between 43 and
55cmHg, the engine is in good condition.
3.4.3. If the gauge drops back about 10cmHg on the dial, this would indicate sticky valves. Disconnect the vacuum hose and spray penetration oil
into the manifold to lubricate the valves.
3.4.4. If the needle consistently drops, this would indicate that the valve clearances are too tight or that a valve has burnt out.
3.4.5. If the needle pulsates rapidly when the rpm is increased, this indicates that valve springs may be weak.
3.4.6. If the needle pulsates rapidly at idle, and steadies out when the rpm is increased, this indicates that the valve guides are worn or loose.
3.4.7. If the needle is slow to drop back after engine rpm has been increased several times in sucession, this would indicate that the exhaust
system may be partially blocked.
3.4.8. If the gauge indicates less than 25cmHg, this would indicate that the valve timing is late.
3.4.9. To check the choke, close the throttle and turn the engine over using the starter motor, the gauge should rise quickly to 55cmHg. If the gauge
remains at a low reading or 7 to 15cmHg then the throttle may not be fully closed or there may be an air leak in the inlet manifold.
Note: Gauge readings will vary with altitude, at sea level the vacuum gauge will drop by 2.5cmHg. For instance at 2000ft the reading will be
44cmHg.
Part Part No.
Description
1.
VSE953.01
Gauge
2.
VSE953.06
Oxygen sensor adaptor M12x1.25
3.
VSE953.05
Oxygen sensor adapter M18x1.5
4.
VSE953.04
Plastic double ended cone
5.
VSE953.09
Plastic T piece
6.
VSE953.08
Large brass cone adapter
7.
VSE953.07
Small brass cone adapter
8. VSE953.03
Hose
9.
VSE953.02
Gauge hanging chain
4. CONTENTS / PARTS NUMBER LIST
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.
INFORMATION: For a copy of our latest catalogue and promotions call us on 01284 757525 and leave your full name and address, including postcode.
01284 757500
01284 703534
Sole UK Distributor, Sealey Group,
Kempson Way, Suffolk Business Park
,
Bury St. Edmunds, Suffolk,
IP32 7AR
www.sealey.co.uk
W e b
Environmental Protection.
Recycle unwanted materials instead of disposing of them as
waste. All tools, accessories and packaging should be sorted,
taken to a recycle centre and disposed of in a manner which
is compatible with the environment.
Parts support is available for this product. To obtain a listing and/or diagram, please log on to: www.sealey.co.uk,
email: [email protected] or phone: 01284 757500