I have a 1993 Toyota Pick=up with a 22re engine and I only have compression on cylinder 1 and 2.....whats wrong and why doesn't 3 and 4 have any compression??
Either needs rings, head gasket, valves not sealing.
NO compression at all tends to be valves or rings. Some compression tends to be gasket. Loss of compression in adjoining cylinder also tends to be gasket. Add some oil to the cylinder and repeat the compression test, if it regains some compression, it was likely the rings (the oil helps seal them). If you see no difference in compression after adding the oil, then it remains the valves or gasket.
If cylinders 3 & 4 are next to each other (in line engine) it's going to be a blown head gasket. When a head gasket blows between two cylinders that are next to each other you lose compression in both cylinders. You'll also not have milky oil or white billowing "smoke" out the tailpipe because the head gasket has not blown into the cooling jacket. HTH. -Jim
Because it is an old, tired engine- and it is crying out for repairs- at least it is a vehicle WORTH repairing-
Perhaps the timing chain is not correctly in position...the cam may be 180 degrees out of position~
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