You would need to recheck the timing marks tpo be sure but the histle sound indicates there is a possible vacuum leak whcich can cause high idling speed. Overheating is anothing. Did you check the coolant level? Are the cooling fans working?

Answered by KHLow2008 (expert)
39,869 answers provided

thank you the cooling fan is working and i checked timing is correct ,the histling sound comes when i plugged a hose from the air filter to the top cover . and my coil gets very hot when driving or it can be wrong wire connection. thanks a lot

Response from Johan Lupps
1 question asked

The air hose is for the PCV and you cannot plug it as it would result in excessive back pressure in the crankcase ventilation sysstem.

When you mean overheating, is it the engine or the coils? Ignition coils do work at a certain temperature.

Answered by KHLow2008 (expert)
39,869 answers provided

An engine is the one which goes high in temperature. i unpluged that air hose and the histling sound disappeared but the idling is still high and i dont know where i can set it.

If you say coils do work at a certain temperature. you helped me a lot because some guys told me that coil must remain cold when a motor is running.

Thank you.

Response from Johan Lupps
1 question asked

Do you have coolant losses?
When does the overheating occurs?
The whistling noise should be from the PCV. Have it replaced.
Ensure the throttle is closed fully.

Answered by KHLow2008 (expert)
39,869 answers provided