LUVTruck.com

Wow LUVTruck.com what a good idea!!!!!

OK here is the sitch....

Bought 79 LUV 4x4 its a gasoline 1.8L, I think just about everything is stock, except the dents, and the super cool spraypanted body.

It seemed to run good, it even passed smog after a little tweeking, then a week later I warmed up the truck a bit, it was about 120F if that damn aftermarket Temp gauge workes right. Any how, I was drivin up a hill and all of a sudden a bunch of black smoke starts pooring out of the tailpipe, burning oil i presume. Then the champ actullay almost made it up the hill, and whill i was looking for a place to safly pull over, it died, and it would start back up for only a matter of secounds. I towed it home, and a friend of mine asked me to start it, and i tried and it fired right up, with the smoke of coarse, so i turned it off. I opend the air cleaner housing and the filter had a spirt of oil in it. I did a dry compression test, when the engine was cold, since fear of warming it up would cause more dammage.

the readings starting from the front to back in PSI were 133, 140, 140, 142

my shop manual says that the regular compression is about 172 I think.

Any thoughts would be greatly appriciated, I will have pics of the plugs and compression readings at http://home.comcast.net/~a.deering within 10 minutes

Thanks

oops my readings for compression are all -10, I really am a dummy

i had the same problem with mine. sounds like the head gasket man, sorry

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1980 luv sport 4x4 Just a memory now
Frame rusted from the inside. Truck stripped and now looking for a new donor in southern ohio

Yep..i would say between 1 and 2 cly. the dreaded blown head gasket. Thats easy to fix and cheeply priced parts to fix. I would sujest dont try starting anymore untill you know the verdict. You might want to check your thermastat before starting again. Good luck And welcome to the cool site!!!

thank you, I was hopping that maybe that would be all it was, didnt want to have to totally rebuild the thing.

If anyone has any other opinions, please give them.

Thanks AGAIN!!!!

I guess I shall start dismantaling, if anyone wants to add a tips please do, I have only engine swapt a few times, never torn one down before.

thanks

so there is a thermastat i never really looked in my manual but when i went to the parts store they said there wasn't one. i even called a couple more stores and they said the same thing

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1980 luv sport 4x4 Just a memory now
Frame rusted from the inside. Truck stripped and now looking for a new donor in southern ohio

WHAT>>>your kidding right????

yeah it sounds stupid. i knew there was a thermastat (i looked in the book last night) but wan't sure where it was. everywhere i called they said there wasn't one. DAMN STUPID ASS CHECKERS AUTO

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1980 luv sport 4x4 Just a memory now
Frame rusted from the inside. Truck stripped and now looking for a new donor in southern ohio

bcg187: Next time you go in have them look for a water pump for a Volkswagen Super Beetle, say a 1972 or so. After they dig for that one for a while, be sure to ask them for a gallon of blinker fluid and some muffler bearing grease.

As for the sudden smoking fit, it does sound like a head gasket (or crack in the head) could be it, but the spurt of oil on the air filter is sort of an oddity. I'm wondering if there could be something wrong in the PCV system sending oil down the intake somehow. There is a small hose hooked to the left (passenger) side of the the valve cover that leads down to the intake manifold. That hose leads to a deal on the manifold that functions basically like a PCV valve if I remember right. I suppose if it stuck open it might get oil down in it. The only way I can think of oil getting on the air filter though would be through the breather hose (bigger hose coming out of the top of the valve cover, leading into air filter) but there is a on the inside of the valve cover that should keep splashes from getting out the hose. I don't know it just seems odd to me, would not hurt to spend some time figuring out how that oil got up there.

Other reasons for black smoke:
Broken ring(s), these should show up in compression test
stuck/bad valve seal(s), usually just smokes a bit at startup and goes away soon after
Someone filled her up with diesel, would not have been so sudden

"stuck/bad valve seal(s), usually just smokes a bit at startup and goes away soon after "

yes this was the case at first, I just thought it was crud in the carb, since it passed smog.

Also I took the carb off, and the intake manifold is flooded with oil.

I will attach pic to the existing pic page, at the bottom, and anone have any suggestions of what tool to use, and how to remove the nut underneath the intak manifold, and closest to the firewall, it seems the coolant connector stems out right in the damn way, it was gettin dark, and i just got back from being outta town. But any tips will be helpful.

I just used a 12mm deepwell socket and an extension if that helps any, for the bolts that are hard to get to with a socket I used a 12mm open end wrench

The only thing is that you need a short 12mm open end wrench, I got one, and it still was a pain in the ass.

Also I think i need a short on for the copper pipe that goes from intake manifold to exhaust manifold. An 8" crescent wrench might work.

bah, at least I am expanding my tool set!!!!

I know that pipe that looks like copper. It is not though...i cut mine off and it is steel....I thought at first mine was copper....what a suprise!! I would say dont take the pipe off the exhaust end...there are three bolts on the bottom of your intake...its better to take it off there....it well be alot easyer to put it back on there.

ok so there are actually blots that attach the part that the pipe screwes into, to the manifold? very clever!!! and coloring the steel pipe to look like copper, even more clever

well the head gasket is brand new, so it looks, any other suggestions on how the intake manifold could get flooded by oil, I thin kthe head is in good shap, will actually do good inspection tomarrow.

new pics on the page, any help would be great. The head appears to look fine, although my bent up level is not good enough to check the surface of the head. will be getting a carpenter's square hopfully tomarrow.

The only thing that was noticably jacked was the pipe that goes from the exhast manifold to intake manifold, where it attaches to the intake, the hole in the intake manifold was sealed shut with carbon, i cleaned it out with a screw driver, w0w the hole was much bigger then it appeard at first.

Ok the oil in the manifold is the darn problem, see the thing is that only a little bit of oil was spirted through the air filter, and didnt seem that so much oil would be able to get through without leaving a bigger mess.


thanks all

Hey Nuget,
Sorry I posted in the OCS forum instead before. I'll repeat my original post in here, just to keep it all in the right spot.

Also, although it's not set in stone, a blown head gasket more often than not will produce white smoke from your coolant, rather than black smoke from the oil. You'll generally find bubbles (or foam) on the dipstick when you pull it too, because you have water in your crankcase.

If you are blowing black smoke, I'd be thinking of worn or broken piston rings or in this case, oil in your intake.

Any-who... here is my previously misplaced post.

A lot of times, what causes this is the PCV (positive crankcase ventilation) valve, or the tubing, gets packed full of gunk from the engine blow-by and doesn't get enough circulation. When this happens, all the crankcase pressure goes to the breather tube and straight into your intake manifold.

Replace the PCV valve. Check all the rubber hoses on the engine. If they are hard and dried out, replace them. You should be able to pinch the rubber fairly easily. If not, they are getting pretty crusty.

Good luck dude!

Headgasket my friend. And as far as the blowby I had the same problem with a toyota celica I had. My buddy told me to just plug the friggin hose from the valvecover so I did.....Hehe 10 miles down the road I blew it up.
My brilliant buddies idea worked, other then all the pressure shot my dipstick out along with all the oil. Anyways from the pic of the burn mark between 3-4 cylinder it's definetly headgasket.

Any water in the oil or vice versa?

i didnt drain the oil, but the dip stick didnt have a lick of water, it looked clean as could be.

Yes the burn mark is a little worrysome, but that is the only sign of a lack of good seal, so Ima check the head with a square, hopefully if it is warped, I can get it machined, and if not, then I get new gaskets and just put that damn thing together again, and check all them hoses like the viper says, I need a cheap fix here.