1992 toyota pick up with Codes 51 & 52

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If I was you I would tear it back to scratch and start over...timing cover off to verify crank gear timing position..set to TDC #1...crank and cam..dead on the marks...chain too....next check dist should be just hitting the pole for #1..if not pull and reinstall...rotor dead on #1 with the dist adjustment slider near center...button it up....use timing light for final adjustment....

One question though...Did it smoke before the new chain set?

I wouldnt think smoking to be a timing problem, necessarily

My friends cherokee started smoking....then this happened!!!
shattered piston.webp
#6 blownup.webp
jeep spaghetti.webp
 
DO NOT set the cahin like that picture. the picture above shows the chain one tooth to far counter clockwise.
If the crank and timing marks are at TDC, and the mark on the chain looks like it does in that picture up above, it is wrong.
The mark should be JUST to the left of the mark on the rocker support.
THEN you have to make sure your distributor is on right. you can verfiy that with a timing light, if nothing else. (provided it cranks and everything is ok so it'll have spark)
 
i reset the cam to the way it is suppose to be just to the left of the mark on the rocker assembly. try to time the ignition timing at 5 degrees. Is there any difference in crank shaft pulleys on diiferent year trucks or are they all the same. maybe the reason for the timing being off is the marks on the crank pulley is not right for this truck. i'll try to find TDC with the #1 spark plug out and make sure its on compression stroke and remark the crank pulley. try to time it off that mark instead of the factory mark on the crank pulley. thanks
 
Guys, we are making this WAY too difficult.

First, stop listening to any of us. If I go back and read ALL of our posts, all assume you have done this before. It is by NO way a good instruction (mine included).

Second, get on the FAQ page and download the dang FSM.. It clearly, without question, shows what to do.

At TDC, the Camshaft Timing Mark and Crankshaft Timing mark are at 180 degrees. Do not confuse the Crankshaft Key mark with the Timing Mark.

The ONLY reason the camshaft timing mark would be skewed to the left is because you have turned the cam, which you must do, to allow for the slack in the chain/allow for putting the Cam sprocket back on the cam. Once you have done this...Read carefully...you are NOT at TDC. Which is fine because your timing marks have moved accordingly.

Move cam and crank back to TDC and slide in dist so that it point to #1.

AND!!!!!!!!!!!!!!!!!!!!!! make sure you are not thinking just because you have the crank ligned up on the TDC mark that you are at TDC. You could very well be 180 degrees off. You should always, as if you are checking the valves, make sure you are at TDC by looking at which valves are open/closed.

So, TDC...check valves to insure...align timing marks...align dist...time engine.
 
you guys are way off i figured it out. And thanks for the help. The crank pulley isn't the right pulley for this truck. i pulled the #1 spark plug out stuck a screwdriver in the hole turned the crank until TDC on compression stroke and found that the timing mark was 12 degrees off from 0. So i mark the crank at zero and timed it from there. The truck runs great but it still smokes a little no where near as bad as it did before. Thanks again
 
I am not sure we were way off-your truck was not timed properly and we assumed you had the right parts on your truck ( :

Not saying this to be the case or not, but I have a hard time believeing the crank pulley is different between a 92 and 93 when the engine is identical. But maybe it is.
 
Tell us what you have done exactly. You say you did this work. Are you saying that you bought a truck that had the wrong crankshaft sprocket?? How did it ever run?

There are many holes in the story.

Please start over and tell us how an engine ended up with a bad crankshaft-if that is the case ( which I dont think it is).
 
yes i pulled the distributor and reset it so it was pointing at #1. The truck was an 85 truck but i pulled the cab and bed off becuase it was in bad shape and i had a 92 cab and bed, wiring harness, fuel tank and intake from a 92 so i swapped them over to the 85 frame and suspension. the engine was from and the engine was from a different 85 truck. but the crank pulley came from a 93 truck that was in the scrap yard.
 
I'd guess the rubber in the main pulley has slipped :)


p.s.
TDC #1 and TDC #4 are the SAME THING.
cam position decides if its the compression stroke or not, NOT crank position.
 
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