low oil pressure at idle.

[jokke]

hello
I have a little problem with my bis. I have change all seals, gasket and piston rings. but when the engine is at idle the oil pressure lamp is on. flikkering, but when it gets a little revs, it's ok. it's when the engine is cool. somebody know the problem?

Thanks

[smallcox]

let me get this right, your oil warning light flickers at idle but only when the engine is cold.

Go for oil presure switch. Reason oil is thinner when hot and this is when I would expect it to be at it's worse when idleing. The pressure switch when cold my have a lower resistance and may be just shorting internally but when the switch gets hot the resistance goes up and the light does not appear to be on.

Failing this the only way to check oil pressure is plumb a gauge into the engine.

Good luck

[jokke]

thanks for reply.
I haven't had the engine going for long, so I don't know what happents when it get hot.
One more thing, I have hydralics tappets, so if i had no oil pressure the engine would stall?

But will hook up a gauge this weekend. Wil post the result.