buzzing engine noise. Help!

[extanker]

Originally Posted by jcb986

When a AOS goes bad or starts to go bad you may have a different warning sounds. The most common is smoke coming out of the engine when running. Mine made a whistle like screetch when the engine warmed up. The vacuum that is being pulled can suck air around the crankshaft seal. So, if you cannot remove the oil filler cap when the engine is running then the AOS is going bad. Was this noise there before you started doing the engine maintenance, if so, then you did not cause the problem. Not sure if you are suppose to run a flat 6 with the flywheel off.

i wanna see him start it with the flywheel off...does yours have a pull start

[heiwaz]

this noise appeared, 2 das before I start to do the maintenance.

Is possible this noise come from the start engine?

[jcb986]

Get a stethoscope from the auto store, remove the belt and listen for the sound around the crankshaft seal and listen to the timing chains. How many miles the Box.

[heiwaz]

Originally Posted by jcb986

Get a stethoscope from the auto store, remove the belt and listen for the sound around the crankshaft seal and listen to the timing chains. How many miles the Box.

it has got around 90000 miles.
Now I'm changin the IMS bearing, so the chain are loose, how can I check it? should I check the chain tensioner, too?

[extanker]

pull the oil sump and cut open your oil filter....tell us what colors you find and the size of the stuff

[heiwaz]

Originally Posted by extanker

pull the oil sump and cut open your oil filter....tell us what colors you find and the size of the stuff

sorry I don't undestand very well you what you want to tell me. can you explain me? do you want to open de oil filter to see what color is? I emptied the oil, but I've got the old oil keep in a bottle.

Sorry but my english sometimes is not perfect. thanks.

[extanker]

do you know anyone in your area that knows engines made by PO that can help you ?