We installed a junk yard 5.0 HO engine out of a '91 Mustang with 30,000 miles on it into my son's '89 LX this weekend. While test driving it, after a good warm up, it blows blue smoke out both exhausts when accellerating hard. What could be causing this, and how do we test to narrow the problems down? Can the EGR system cause oil to be burnt? Rings? Valve seals? Do we have something hooked up wrong with wiring or vacuum? Help!
new replacement engine blows blue smoke
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If it happens when you get on it, more then likely it would be a ring problem... Do a leak down and compression test to narrow down which cylinder(s) are causing the problem.
s&k stangs
New Member
Mine blows smoke, I changed the plugs this weekend and found oil covering #4 from electrode to the threads, so you may want to pull the plugs and maybe that'll help pin it down?
Gotta love how junkyards lie. I bought a motor for a '96 Blazer at a junkyard and they told me it only had 86k on it.
I went back there for some other parts for the truck and looked at the Blazer the motor was from and it had 113k on it.
It burned oil too. Atleast the bearings were ok unlike the motor I replaced.
I went back there for some other parts for the truck and looked at the Blazer the motor was from and it had 113k on it.
It burned oil too. Atleast the bearings were ok unlike the motor I replaced.