Audi Repair: A4 1999 2.8 , 5v quattro, coolant temp, temp guage


Question
Hi 2 part question thanx...1st my car is running fine but my oil light comes on when 1st starting(Not check engine light)I noticed my oil pressure is at about 200 on the guage( what is the avg. # )?And oil level is not down thou ? What could be the prob ? and now it takes longer to start when cold, but seems to fine when engine warm ? And my coolant level is going down a little, temp guage is half way, Not getting hot, but the rad seems to get hot and steam coming from it, do you think that thermostat is stuck  ?

Answer
hello
Looks like you have coolant leak, if the level goes down.
every time you see steam - it's a  leak. So , check your radiator (pressure test it) for any leak.
Oil light - 200 on the gauge it's OK , my car has the same.
I will check the press. with the manual gauge or just replace the sender (sensor). If the press. is low, I will check the pump .
It takes longer to crank - check for faults in ECM if you see ECT fault - replace coolant temp sensor. Sometimes. when it goes bad -  it may read -40 , ECM gives more fuel and it takes longer to crank.
good luck           Greg