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  Timing belt question - astra 1.7dti (izusu)
  Discussion in 'Astra, Corsa, Zafira, Meriva, Adam, Cascada, Agila, Viva, Tigra & Nova [Includes AstraVan & Combo Van] owners forum' started by snowgatehead, May 4, 2007.
  snowgatehead
  Hi guys, Further to an eariler post:
  My astra 1.7 dti (izusu) is In the mechanics at the mo, since the oil pressure warning light started flashing rapidly at low RPM's mid journey. Stopped as soon as poss' and got a tow to the garage.
  Now, the mechanic has said that the engine has been staved of oil, and the damage will need investigating (they started the engine with a seperate oil feed pump, to keep the oil flow) and its noisy as hell. Its looking likley that a new engine will be required, either recon or a low mileage unit from the scrapyard.Click to expand...
  Now, the engine seems ok the garage informs me that the fault was the oil pump pully / sprocket securing nut has come off leading to a loss of oil pressure damaging the engine, (needs new oil pump, timing belt & camshaft sprocket). The mechanic looking at the problem has indacated that this nut was not tightened properly when the cambelt was replaced (This was done at another garage 6 months ago). [*gerryg, you were right!!!]
  This may seem a daft question but when relacing the timing belt on the isuzu 1.7 diesel engine, do you have to take any of the sprokets off? IE the oil pump in particular??
  I would guess that the tensioner would be slackened off, old belt off an a new belt popped on (with all sprokets etc lined up) and tensioner replaced.
  snowgatehead,
  no you don't need to remove the oil pump gear to change the belt or remove the timing cover regards
  No the pulleys dont need to come off for a belt change. But it is a common problem with the nut slackening off causing no oil pressure. i have done a few of them. Vauxhall were aware of the problem. Normally they will run ok again with new pump, pully and nut but sometimes you find that the turbo will fail soon after due to the lack of oil!! here is the field remedy!!
  Field Remedy: 1558
  Subjectil pump - Sprocket nut gets looseModels:Enginesption:Astra-G 2000...2005,Corsa-C 2001...2005,Meriva 2004...2005,Astra-H 2004...2005Y17DT| Y17DTL| Z17DTL,Y17DT| Y17DTL| Z17DTH,Y17DT| Z17DTH,Z17DTL| Z17DTHNoneComplaint:In some cases it might be possible that the oil pump drive gear nut detaches during engine operation, causing the timing belt to jump over. Complete engine damages are extremely rare.Cause:Inadmissible offset of oil pump sprocket during assembly in engine plant.Production:Implementation of an addition monitoring operation at assembly plant. A 100% check will be carried out regarding: - Checking the offset between the pump sprocket and the timing belt. - The gap between the shafts end and the nut outer surface. Furthermore the tightening torque for the oil pump drive gear has been increased to 60 Nm as of the following engine number: 11806070 (December 2004).
  In case of concern please repair according to engine damage. Please note that the tightening torque for the oil pump drive gear has been increased to 60 Nm.
  Tightening procedure: Tighten the oil pump drive gear nut by 60 Nm and wait 60 seconds (30 seconds is a minimum requirment). Loose the drive gear nut. Retighten the drive gear nut by 60 Nm again.
  For claiming costs please contact the Technical Assistance Centre (TAC).
  After TAC release the costs for this repair will be covered for vehicles not older than 3 years and a mileage lower than 100.000 Km.
  Note: In case of engine or cylinder head replacement the replaced part and the failed oil pump has to be returned to the Warranty Parts Return / European Core Return Centre.
  FunctionalGroup:J - EngineComplaint Group:11 - Loose or Comes offTrouble Code:None
  Timing belt1.7 dti
  I do not see how the enginge could run if the belt came off the oil pump. It would stop immediately. I changed the timing belt last week on my 1.7 cdti, the idler wheel and the tensioner were the only two screws that needed to be removed except for the crankshaft pulley screws.