Glow­plug change

Car Mechanics (UK) - - Tales From The Workshop -

▶ The chill­ier morn­ings had given this owner cause for con­cern as his 2006 BMW 520d was not start­ing as eas­ily as it used to. When we told him that the glow plugs needed re­plac­ing, he thought the job would be a sim­ple process tak­ing about half-an-hour. How­ever, the book time for the job is ac­tu­ally 1.5 hours.

The rea­son for this is that the in­let man­i­fold needs to be re­moved to al­low ac­cess to the heater plugs. Af­ter we tested the sys­tem and found two heater plugs had failed, the owner agreed that, as the man­i­fold needed to be re­moved, it made sense to re­place all four plugs as a pre­ven­tive mea­sure against fu­ture prob­lems. It also made sense to re­place the man­i­fold gas­kets, which were likely to have hard­ened. The job went smoothly and the old heater plugs came un­done OK, which is not al­ways the case with these cars.

The in­let man­i­fold has to be re­moved to ac­cess the glow plugs.

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