after one week of no probs,my vl has a knock in the front of motor,what has happened?

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after one week of no probs,my vl has a knock in the front of motor,what has happened?

vl calais,rebuilt head and retimed to suit new turbo cam,now it has developed a serious knock in the front of motor after working well for 1 week,could it be a main bearing,as compression test is ok.

2006-12-25 06:24:26 · 2 answers · asked by michael D 1 in Cars & Transportation ➔ Maintenance & Repairs

2 answers

Make sure harmonic ballancer is tight,it may be to late if it rounded the front of the crank.

2006-12-25 06:30:34 · answer #1 · answered by allwayshappy 2 · 0⤊ 0⤋

When the head was "re-built" did they replace all the valves? Did you have them readjust your rockers since the rebuild? Sounds like a hung lifter...try some "Marvel Mystery OIL" it may free it up if not I'd say time to replace the lifters.

2006-12-25 15:11:24 · answer #2 · answered by Robert P 6 · 0⤊ 0⤋