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Post by packrat on Mar 26, 2014 22:57:59 GMT -5
Changed the plugs in the justy about 15,000 miles ago. At the time i was told I probably have a blown head gasket as (if memory serves me right) 1 of the plugs was white and crusty. Well 15,000 miles later and never any sign of antifreeze in the oil. Pulled the plugs today and all 3 are white. Any thoughts? Motor had plenty of power when i pulled it. The plugs are autolite 63
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Post by blacklight on Mar 27, 2014 0:14:45 GMT -5
Bad intake gasket?
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Post by gearheadeh on Mar 27, 2014 11:59:09 GMT -5
Tell you what you can rule out: It can't be a bad head gasket as there is no signs of the plug end being washed clean and shinny with drops of greenish water beaded up on the plug electrode. It is dry looking with out any of the typical shinny wet black of an engine that is burning oil real bad. Instead you have a light or white colored ash deposit from some of the oil being burned, almost a normal sign on that plug.
At any rate I would not worry too much about there being a blown head gasket.
Also if you had a leaking intake gasket it is doubt-full it would simultaneously affect all 3 cylinders. Something like that would cause the engine to have so much of a vacuum leak that it would not idle below 2000rpm!
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Post by packrat on Mar 28, 2014 1:04:23 GMT -5
Tell you what you can rule out: It can't be a bad head gasket as there is no signs of the plug end being washed clean and shinny with drops of greenish water beaded up on the plug electrode. It is dry looking with out any of the typical shinny wet black of an engine that is burning oil real bad. Instead you have a light or white colored ash deposit from some of the oil being burned, almost a normal sign on that plug. At any rate I would not worry too much about there being a blown head gasket. Also if you had a leaking intake gasket it is doubt-full it would simultaneously affect all 3 cylinders. Something like that would cause the engine to have so much of a vacuum leak that it would not idle below 2000rpm! Yeah I had my doubts about the head gasket being bad, as it ran so well. Glad it hasn't failed, as loosening head bolts with the engine out is a pain.
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Post by blacklight on Mar 28, 2014 2:15:22 GMT -5
Tell you what you can rule out: It can't be a bad head gasket as there is no signs of the plug end being washed clean and shinny with drops of greenish water beaded up on the plug electrode. It is dry looking with out any of the typical shinny wet black of an engine that is burning oil real bad. Instead you have a light or white colored ash deposit from some of the oil being burned, almost a normal sign on that plug. At any rate I would not worry too much about there being a blown head gasket. Also if you had a leaking intake gasket it is doubt-full it would simultaneously affect all 3 cylinders. Something like that would cause the engine to have so much of a vacuum leak that it would not idle below 2000rpm! Yeah I had my doubts about the head gasket being bad, as it ran so well. Glad it hasn't failed, as loosening head bolts with the engine out is a pain. If you have a good engine stand, it's no biggie. When I removed the head om my little bus's engine, I had to stand on the block of course, but that was before I got my stand. ^^
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Post by Armageddous on Mar 29, 2014 20:55:08 GMT -5
If it was crusty and white, got cleaned, and now you're showing minor signs of white then I second the oil consumption notion. It does not look like it's drinking it, but if it accumulated at one point then it's worth looking in to, with a compression test and a check of the valve seals and guides.
Terry
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Post by packrat on Apr 1, 2014 15:09:43 GMT -5
If it was crusty and white, got cleaned, and now you're showing minor signs of white then I second the oil consumption notion. It does not look like it's drinking it, but if it accumulated at one point then it's worth looking in to, with a compression test and a check of the valve seals and guides. Terry It did burn oil, but if memory serves me right is only about a 1/2 quart between oil changes, so i'm fine with that. Might of been burning less than that as i have the well known oil leak problem at the distributor. Was running mobile 1 high mileage oil. Will probably switch to full synthetic and see what happens. Will also replace the fuel filter as i have no idea when it was last changed. Currently looking for o-rings for the coolant cross over pipe as it had a slow leak.
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Post by sp0ngebob on Apr 22, 2014 17:52:36 GMT -5
keep in mind half a quart is a 6th of the oil that goes in...its equivalent to 1qi on any other motor, ratio wise.
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henrypaz
PLEASE: easy way to install hitachi carb? it took HOURs for 2 front nuts last time!
Posts: 106
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Post by henrypaz on Feb 6, 2015 21:32:26 GMT -5
Just to add a little info to the pot here......About a year ago my 89 gave a great puffing of white smoke out the exhaust pipe and I suspected a blown gasket, so I let it set for awhile. Months later I did a compression test with the results of 170-175-165 PSI. Admittedly, I didn't run the car to warm it up as i guess I should have. So thinking it was well, I got her back on the road and drove a few hundred miles.
Well, one day I looked under the hood and found oil goushed all over the engine, and coolant on top of the radiator tank! My son said "blown head gasket!" I denied it because of the recent comp test. When I pulled the plugs, the middle one looked just like the OP's whitened plugs do. I have never seen plugs with that look before. Not clean, but with a powdery/white look like a lady's make-up. Some snooping o' the net said that could be a blown head gasket.
I did another comp test then with these results: 150 - (77, then 100, then with oil= 125 ) - 150 PSI. Even with the addition of oil to the middle cylinder, it has dropped to the lowest of all. By 50 PSI.
(Later--early February )---- Drove the car to the shop to tear into it, but thought another compression test wouldn't hurt. Well.........I found the numbers pretty much back to normal. About 165-175 range for all three cylinders. Remembering what my son had said about 'loose vacuum hoses', I went on a major search and found my idle compensator hose open--just pouring air right into the middle cylinder, AND letting the 'hot-air-stove' remain in the "hot" position. Both things not at all good for the proper ignition of the fuel charge. Hooked that hose up, and it runs smoother already. I'll run it a bit and 'read' the plugs . More later.
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