compression

[tookie56]

my 89 dt90 has 120 lbs on 1,2 and 3 cyls. but zero on 4?? what do i do??

[seaox230c]

First thing is to pull the head...could be as simple as a bad head gasket

[seaox230c]

Hopefully this link works http://store.brownspoint.com/pdf/DT9...100(89-00).pdf pull out the long/big bolts number 9 in diagram. When the heaqd comes off either there is a big hole where your piston used to be or your gasket (number 4) is bad