1990 Mazda B2600 Experiencing blue smoke from tail pipe

  • 1 POST
  • 1990 MAZDA B2600

Engine Performance problem
1990 Mazda b2600 4 cyl Two Wheel Drive Manual 142000 miles

Just got the cylinder heads done at a machine shop. Relap valves, replace all seals, reseat (1) cylinder and changed all 12 lifters. Assembled heads and started truck. Noticed blue smoke coming out of tail pipe when at idle. Step down on gas pedal and noticed more clouds of blue smoke coming out of tail pipe. Pulled spark plugs out of each cylinder and noticed gas on plugs. Recheck timing mark and saw that it was off by 12 degrees. My cam sprocket is set at the three o' clock position and the crankshaft is at TDC. Even after adjusting the distributor to the 5 degree BTDC or at TDC, there is still blue smoke coming out of the tail pipe when at idle. How can I correct this problem?

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have the same problem?
Saturday, April 3rd, 2010 AT 9:42 PM

1 Reply

  • 17,507 POSTS

We all know blue smoke = oil burning. If it didnt do this before the machine shop work, find out if the valve stem seals are in place. If it did do it before, compression test engine dry, then a few drops of oil in the cylinder, if readings are now higher, rings are worn.

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Sunday, April 4th, 2010 AT 8:45 AM

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