Vaux­hall In­signia

Part five: Hav­ing re­moved the en­gine, we try to di­ag­nose what is caus­ing the run­ning prob­lems.

Car Mechanics (UK) - - Contents -

We had ini­tially thought that things couldn’t get any worse with our In­signia af­ter re­al­is­ing the en­gine needed a re­build, but more bad news hit us this month. In fair­ness, some of it should have been ex­pected. For in­stance, we found one of the sources of the coolant residue around the lower half of the en­gine block: the wa­ter pump is leak­ing and doesn’t look par­tic­u­larly new, so it prob­a­bly wasn’t changed when the tim­ing belt was re­newed last year. Also, the clutch looked rel­a­tively new, but it ap­pears the dual mass fly­wheel wasn’t changed at the same time and it’s not in good shape.

How­ever, these ser­vic­ing short-cuts were only the tip of the ice­berg as we stripped down our In­signia’s en­gine.

The big­gest hor­ror came when we re­moved the diesel par­tic­u­late fil­ter and found a large rec­tan­gu­lar-shaped stitch­weld on one side. We sus­pect the in­nards were re­moved to re­solve any DPF is­sues and con­se­quently the ECU may have been remapped. Legally speak­ing, we must re­solve this by fit­ting a new DPF and hav­ing the ECU checked.

If that wasn’t bad enough, when we de­liv­ered our dis­man­tled en­gine block to our lo­cal ma­chine shop, they crack­tested the crankshaft and it failed. They also found that the main bear­ings caps had dis­torted and hard­ened, so there was no point in line-bor­ing them be­cause the ma­te­rial would be dif­fi­cult to re­move. Plus, the dis­tor­tion meant they were no longer a tight fit to the en­gine block.

For­tu­nately, there is some good news. Our lo­cal ma­chine shop wasn’t that con­cerned over the con­di­tion of our en­gine. It spends a large pro­por­tion of its time deal­ing with these sorts of prob­lems. In fact, at the time of our visit, it had line-bored SIX of these en­gines the day be­fore!

Newspapers in English

Newspapers from UK

© PressReader. All rights reserved.