knocking noise

[bankyg60 0]

hi there ive just had my 8vg60 engine rebuilt ,i had the crank skimmed and had all the right b rings put in .but now arfter 3000 mils it seems to be back ???help should i take it back and say oi you whats going on ????

[andycowuk 0]

what rev range and temperature range do you here it in? The charger belt and tnsioner can make a dodgey rattely sound at around 1-2.5k.

[bankyg60 0]

it seems to be at low revs ,but ive just had my charger done at jabba. they done the belt ,and the shocker???

[h100vw 0]

Do you mean you have had the crank ground undersize? If so have the fitted oversize bearings to compensate. I am surprised that a VW crank would need grinding, unless you ran it for ages while it was knocking.

 

Did they replace all the big end bolts? They are stretch ones and can be re-used once but for less than £20 on a rebuild it would be daft not to.

 

The tensioners do rattle at tickover and sometimes higher revs, you could hold teh spring while revving the engine from iunder the bonnet. That would eliminate that.

 

Have you posted in another thread about oil pressure problems?

 

Low oil pressure could be the result of duff big end bearings!!!

 

Gavin

[bankyg60 0]

year that was me .but my presures are ok .and it was my mates dad that done the rebuild i was the one that picked up the over sized shels .do you recken that i should drop the sump and check the shels#?????

[h100vw 0]

Yeah mate I would. Very unusual that it would shag them in such a short time, unless they were the wrong ones????? How far undersize did you go with the crank? ARe you 100% the new shells fitted were correct?

 

Not having a go at your mates dad but the big end bolts have to be done up correctly, first to a torque setting and then I think it is 180 degrees. Maybe one has failed????

 

Gavin

[bankyg60 0]

i think it was 0.15 oversize on the conrod shells only not the crank shells .ok looks like are have a look sat hope it will b ok for gti international sunday any of you going up . :-P