I have a 1990 325i and it wont start it just died driving down the road one day and hasnt started since I have spark and fuel and the timming belt is new and the valve train is rotating but I have no compression in 5 cylinders the compression in cylinders 1 through 5 is between 12 and 65 psi but cylinder 6 has 171psi any ideas as to why I have low compression in 5 cylinders but good compression in 1 cylinder if the timming was off would there be compression in only 1 cylinder? I have not checked the timming I will be doing that in a day or so.
no compression
- Thread starter custom_composite
- Start date
Yes all plugs out and WOT I checked the timming it is dead on pulled the valve cover and the rocker assembly is good all rockers move I did notice that the oil in the head was a little milky looking not totally white but its almost the color of coffee with a little cream in it so I am getting water in the oil I think the head gasket is bad but with the compression so low in 5 out of 6 cylinders it must be real bad I have never seen that many cylinders effected by a bad head gasket or head usually its one or two cylinders I dont see any cracks in the block can a head or head gasket take out 5 cylinders but leave one cylinder good?
Here are the compression readings I got with all pugs out and WOT with a little oil shot into the cylinders.
Cyl1 50psi, Cyl2 25psi, Cyl3 12psi, Cyl4 10psi, Cyl5 65psi, Cyl6 171psi.
Any ideas some of those readings are real low I thought the gauge was bad but checked it on my wifes car it checks good so these are the compression readings.
Cyl1 50psi, Cyl2 25psi, Cyl3 12psi, Cyl4 10psi, Cyl5 65psi, Cyl6 171psi.
Any ideas some of those readings are real low I thought the gauge was bad but checked it on my wifes car it checks good so these are the compression readings.
