Engine Noise But Not Chain Help Please

Scottysri

Got a 2.2 astra sri 02 reg I was driving the càr the other morning never missed a beat my wife borrows it to go to her mam about 6 miles drive no probs turned car off went into her mam come back out to start the car and it sound like an old tractor and missfiring I took the rocker cover off and the chain is nice and tite full kit was only fitted in April any one got any ideas

vocky

a mis-fire could be the coilpack (y)

Scottysri

Just had this knocking noise from the top end of the engine same time as miss fire is it possible for oil pump to have gone and its not building the hydraulic lifters up cause it only seams wet on the chain side

vocky

the oil restrictor can block in the head, but you need to whip the head off to check that o_O

But you can check to see if the hydraulic lifters have oil by removing the cam cover and cranking the engine over with a spanner on the crank pulley (21mm), if all the valves open and close as you crank the engine then it would be unlikely to be the lifters.

Might be worth checking the cam timing whilst doing that.

Scottysri

I have turned it over with the rocker cover off cams seam to be working fine but not much oil about does it normally go everywhere .

vocky

normally a light coating on everything, rather than lots of oil everywhere.

Get pistons one and four to TDC and check the cams are still aligned (make sure piston four, next to gearbox, has the cam lobes pointing towards each other), then the cam timing should be at 10 and 2 'O' clock