1grfe crankshaft removal

Blew my engine at 302k miles, spun a bearing on cylinder 2 in my 1grfe. I found a junkyard 4.0 and was wondering what’s the fastest way to remove a crankshaft since mine is more than likely toast. Is it really just pull the pulley, drop pan and unbolt? Never rebuilt an engine before so this is all new to me so I apologize if this is a dumb question.

 

Swapping in the junkyard engine would likely be the overall easier play. Assuming that it is a healthy engine.

Less tedious work to be performed, for sure.


Swapping the crank in, would mean that you need to check main bearing clearances, and rod bearing clearances. Then replace bearings as necessary. Most likely have to replace the rod for cylinder 2 as well.

Then, how much metal material is circulating through that engine, from the spun bearing?

Engine swap is easier, with less precision tools required.

 

With 300K + there is more than just a crank shaft issue. Junk yard engine is the easiest way out. How is the rest of the truck? Maybe time for a newer truck.

 

why not swap in a used motor with lower miles

the crank might be able to drop by removing lower and upper oil pan

That typically requires making sure other parts are good by measuring them such as with plastigauge. At that point you might put all new bearings. I don’t know if there’s other bearings like thrust bearings, if they even sell them separate.

that doesn’t account for if anything else may be worn such as pistons, etc

some vehicle pistons come with a PTFE coating on the side of them which wears over time. Don’t know how important that coating is. If it’s just for brand new MPG. Not every piston has that.

 

Gotta remove trans to unbolt flexplate. Crank wont just fall out.

 

If it spun a bearing the con rod on that journal is no good either so the head would have to come off also it's not an easy fix.

 

might be able to keep the old motor for spare parts, or examine and build it

or sell to anyone else who may need the motor or parts
To recoup some of the repair cost

yes trans would also have to be pulled as flex plate or flywheel is bolted to back of crankshaft

have pulled motors but not on my truck. Not sure the easiest method.
If the hood even opens far enough to yank out the top or needs to be messed with.
One way to do that is jack up at the trans to keep it supported and angle can help clear front core support but on the Tacoma with room in the front that may not be needed.

I mean if con rod bearing has issues that can potentially be replaced right there from the bottom
Or if the rod is trashed potentially pulled out the bottom to replace

seems like what folks do on BMW E60 M5 V10 and E9X V8 M3

 

Most blocks don’t have a flat opening at the bottom of cylinder, so no real way to get the pin out abd can’t get pistons back in from bottom for same reason. That said, I have never seen the inside of a taco block.

 

Basically no offence but if you have to ask its not going to work with very high chance of failure. You cannot swap the crank from one used engine to another.

Swap the unit.

 

sounds like the perfect way to have 2 bad motors

 

If you find a parts truck
Hopefully it’s still in the truck. That way it can be ran and inspected.

vs certain junkyards being quick to yank it out and stack on a shelf. Can’t turn it on there.

I haven’t seen these engines selling for cheap enough used to justify taking parts out of it.
German motors on the other hand seen them gotten rid of for free or couple hundred bucks.