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• NOTE: W here pos si ble, compress i on tes t ing s houl d be carried out on an engine at normal operat ing temperat ure.
T ESTCONDIT IONSDET AILS/RESULT S/ACT IONS
A1: CARRY OUT A DRY CYLINDER COMPRESSION T EST
Make s ure t he parki ng brake is appl ied and t hat t he s elector l ever is in neutral (or park for vehi cl eswi th aut omati c transmis si on).
Set the ignit ion s t at us t o OFF.
Remove t he st art er rel ay.
Dis connect t he st art er motor s olenoid connect or.
Connect a s uit able remote st art er devi ce to the s t art er mot or s ol enoi d.
Remove t he glow pl ugs .REFER to: Gl ow Plugs (303-07B Glow Plug Sys tem, Removal and Ins tal lati on).
Ins t all s uit abl e adapt or in pl ace of t he glow plug i n t he fi rs t cyl inder to be tes t ed.
Connect a s uit able compres s ion t es ter t o the adapt or. See warni ng above.
Us ing t he remote s t art er device, crank t he engi ne a mi nimum of fi ve revoluti ons.
Record t he compres si on fi gure and t he number of revol uti ons taken to reach it .
Repeat s t eps 7 - 10 above for t he remai ning cylinders , cranking t he engine for a s imi lar number ofrevolut ions each ti me.
Compare the compres s ion figures acros s al l t he cylinders .
Are the compres s ion figures wit hi n 10% of each ot her?YesUnles s t he compres si on fi gures are uni vers al ly very low (experience wi ll indicat e thi s), check forother caus es for the cus tomer complaint .NoGO to A2.
A2: CARRY OUT A WET CYLINDER COMPRESSIO N T EST
CAUTION: If engi ne oil i s int roduced i nto the cyli nders, run t he engi ne at 2,000 rpm for a mi ni mum of t en mi nutesaft er compl eti ng tes t ing t o prevent damage to the catal yt ic convert ers . Fai lure to foll ow t his i nst ruct ion may res ul t indamage t o t he vehi cl e.
• NOTE: There is a combus ti on chamber i n the top of each pis ton. Make s ure that the oi l is not all owed t o run into thi schamber.Us ing a sui table oil can wit h a flexibl e s pout , int roduce a s mall amount of cl ean engi ne oil int o t hecyl inder jus t before tes t ing, such t hat the oi l i s able to run between t he pis t on and t he cyl inder bore.Repeat s t eps 7 - 10 from the tes t above, int roduci ng oil i nt o each cyl inder jus t before tes ti ng.
Compare the compres s ion figures acros s al l t he cylinders .
Is the compres s ion figure higher than t he dry tes t?YesA hi gher figure foll owing t he int roducti on of oi l may indi cat e a worn or damaged cyli nder bore, pi st onand/or pis t on ri ngs . Dis as s embl y would be required to confirm t his .NoIf the compres s ion figure is unaffect ed by t he int roducti on of oi l, but t he fi gure is s ti ll les s t han 90%of the ot her cyl inders , thi s may i ndi cat e a burnt and/or s t icking valve, leaking head gasket , et c.Dis as s embl y would be required to confirm t his .Clear any DTCs which may have been i nduced by t he tes t .
PINPOINT TEST B : OIL CONSUMPTION TEST
• NOTE: Oi l cons umpti on wil l vary, dependi ng on a number of fact ors . New engines will normall y us e more oil t han 'run-in'engines, once a cons umpt ion fi gure has been det ermined cont act Deal er Techni cal Support for furt her as s is t ance.T ESTCO NDIT IONSDET AILS/RESULT S/ACT IONS
B1: CHECK FOR EXCESSIVE OIL CONSUMPT IONStart the engine and al low it t o run unt il i t reaches normal operat ing temperat ure.
Make s ure t he vehi cl e i s parked on a l evel s urface and swi tch off.
All ow t o s et t le for at least five minutes .
Check t he oil l evel.
Correct t he level, i f necess ary, and record t he reading and mileage i n t he vehi cl e his t ory.
Make s ure t hat the owner/dri ver i s aware that a t est i s being carried out , and that t hey should nottop-up their oi l level for the durat ion of t he t est , but should check t he level every 160-240 Km(100-150 mil es ).
W hen t he oil l evel reaches the ADD mark, t he cust omer s houl d bri ng the vehicle in to be checked.
Top-up t he oil t o the level at t he beginning of t he tes t and record the amount of oil needed to dos o, and t he mi leage covered in the cours e of t he tes t .
From this , t he cons umpt ion can be calculated, and a decis ion made as to whet her or not t hecons umpti on is cons idered excess ive.Is the consumpt ion excess ive for the mil eage and/or us e? Contact Dealer Technical Support for furtherass is t ance.YesDis as sembl y wil l be required t o check t he components indicated i n t he s ympt om chart .NoNo furt her acti on is necess ary.
PINPOINT TEST C : CHECK THE ENGINE OIL PRESSU RE
• NOTE: The vehicle must be driven a minimum of 6 mil es (10 ki lometers ) prior t o t est ing t he oil press ure. Do not at temptt o att ain normal engi ne operati ng temperature by all owi ng t he engi ne to idle.
• NOTE: Check and, i f neces sary, t op-up t he engine oil l evel before begi nning t his test .
T EST CO NDIT IONSDET AILS/RESULT S/ACT IONSC1: CHECK FOR LOW ENGINE OIL PRESSURE
