Overheated due to leaking radiator, getting misfires after installing new radiator

The spark plug wires in your picture say "Sumitoto 2011", the same picture that shows where the wire insulation wore through. It's a manufacture date. The original wires on my 1999 said 1999. In 2012 I bought new Toyota spark plug wires and they said 2012 on them.
Ah got ya. That pic is from the engine still in the truck. I'm kinda scratching my head try to figure out why there would be 2011 wires on it. I purchased the 4runner on 2009. Guess I must have done the plugs and wires when I did the timing belt in 2012 @ 120k.
 
As far as the compression test goes.
Rub your finger on the cam lobes.
Do they have a film of oil on them? I bet they do.
The cylinder walls will as well.
Yep, film of oil on the cam lobes.

I'd pull the plugs and open the throttle body fully and jump the starter to do a compression test.
But this assumes the motor has already been installed in the truck, right? I mean the starter motor bolts into the bell housing, which is still attached to the tranny in the truck.

I think I'm going to swing by Napa this morning and pick up a leak down tester. The Harbor Freight one (also have one of those in town) has terrible reviews.
 
If you look at how the engine was delivered you'll see it is resting on the driver side valve cover. If there is sludge due to lack of maintenance, I'd expect it to be spread everywhere and evenly.
Japan is a small country and they have public transportation. They drive very little so most engines have few miles.
Very true. Same where I come from (Denmark). So maybe the engine looks the way it does due to short trips and lack of yearly oil changes and does indeed have 60k or less on it? After doing a leak down test, I'll drain the oil, drop the pan, and have a look at the bottom end. Should be interesting.

How is the throttle body after the butterfly valve?
I didn't check yet, but will do so this morning.
 
Good work so far. I'm jealous of your shop. That's awesome. Good call on the leak down test. Did you ever put a boroscope into the engine?
 
Boroscope should be here early next week.

Appreciate the comments on the shop. It is a mess right now, so let me share some old shots from when it was clean. I think after this 4runner is done, I'll do some spring cleaning.

My 2002 Duramax after it got stuck in the mud and sucked a lot of it in through the K&N intake into the turbo. Fortunately I was able to get it all cleaned out and it runs great to this day.

Truck_&_Shop_Shot.jpg


Wife #2's Grand Vitara that she ran out of oil. It had the 2.5 V6 but I swapped in a 2.7 V6 as that is all I could find. Had to redone a lot of the electrical connectors for the PCM. That was a huge pain. Come to think of it, wife #1 had a Gold GTI that I swapped the engine in as well. I don't recall the root cause, but I don't think it was due to negligence on her part. That was before I had the shop, so I did that one in dad's garage, which is also where I swapped the straight 6 300 for a 351 Windsor in my 1981 Ford F-150 4x4, after it threw a rod during some 4x4 fun.

whatamess.jpg


My C5 when I was swapping the transmission out. It made about about 425 at the wheels, which was not bad for back in the day (16 years ago). Had Halltech intake, heads, very lopey cam, long tube headers and a B&B exhaust. I wrapped it around a cherry tree a few years later which totaled it. Should have left traction control on...

shop2.jpg


Used the insurance money as a down payment on this guy. V10, 500+ HP and a 8,250 RPM redline. That was one fun ride.

m5inshop2.jpg


After having kids with wife #3 (2 girls 4 and 5 years old), I sold it and had to make some life style changes. Fortunately there were no kids from my 1st 2 marriages.

I don't know if I'll ever get the shop floor looking that clean again, at least not without another coat of UCoat It.

We now return to our regular scheduled program. :popcorn:
 
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Napa did not have a leak down tester in stock, so I had to go with the Harbor Freight special. It is only able to test at about 10 PSI, so the numbers probably pretty iffy. It is also almost impossible to get it to exactly zero before starting each test. But I did test each cylinder a couple of times, and these represent the average figures I got from each cylinder.

Cylinder 1:

cyl1-leakdown.JPG


Cylinder 2:

cyl2-leakdown.JPG


Cylinder 3:

cyl3-leakdown.JPG


Cylinder 4:

cyl4-leakdown.JPG


Cylinder 5:

cyl5-leakdown.JPG


Cylinder 6:

cyl6-leakdown.JPG


And here are what the plugs looked like. I overlaid the leak down numbers I obtained for reference.

4runner2-18-01.JPG


#6 was pretty wet and #2 was moist. Didn't smell like anything, so probably just condensation from sitting.

So less than 20% leak down on all cylinders. Is that decent? Again, take the numbers with a grain of salt given the quality of the Pittsburgh Automotive tool I was using.

I took this pic of the serial number as well. Not sure how to translate that into the year it was made, but assuming the thermostat is original, it would be a 2002.

4runner2-18-02.JPG


Guess it's time to drop the oil pan. Will be interesting to see what things looks like down there...
 
Drained the oil out out the JDM engine. It was dark, but no signs on any coolant contamination. I didn't think they were supposed to ship these to here from the East with oil in them.

4runner2-18-03.JPG


Popped off the pan and then turned the engine over. I'm actually pleased with how the bottom end looks, considering how the top looked.

4runner2-18-04.JPG


Only the front area had any sludge to speak of.

4runner2-18-05.JPG


And the bottom of the pan also didn't look too bad.

4runner2-18-06.JPG


Scraped off the sludge and hit the oil pan surface with a razor blade.

4runner2-18-07.JPG


Haven't decided if I want to take off the oil pick up tube and pop that splash cover or not.

Here's the JDM throttle body: (I'll be using the one from my old engine as it only had a single throttle cable)

4runner2-18-08.JPG


4runner2-18-09.JPG


So I decided now would be a good time to work on the engine still in the truck. Got the driver side front wires disconnected along with the lower alternator bolt and adjustment mechanism. (still need to do the alternator wires themselves).

4runner2-18-10.JPG


Next I did the 2 lower AC compressor bolts and also undid the brackets holding the trans coolant lines.

4runner2-18-11.JPG


Here's a shot from the back passenger side looking forward and up. The passenger side bell housing bolts are visible and look like they won't be too bad to get at.

4runner2-18-12.JPG


And a shot at the starter. The passenger motor mounts are also in plain sight. I'll be leaving the starter on the engine until it is out if I can. Need to figure out how to undo that 12V cable going to it through.

4runner2-18-13.JPG
 
I might look into having the oil tested. Not a bad idea! And good tip on doing the stater plunger. Not sure about headers. This is the wife's ride, lol.

So the boroscope showed up early. It is just a cheap eBay special with a USB connector, but is does provide some insight.

JDM engine cylinders 1, 3, 5:

jdmcyl135.JPG


JDM engine cylinders 2, 4, 6:

jdmcyl246.JPG


JDM engine intakes 1,2 3:

jdmintake123.JPG


JDM engine intakes 4, 5, 6:

jdmintake456.JPG


Old engine cylinders 1, 3, 5:

oldengcyl135.JPG


Old engine cylinders 2, 4, 6:

oldengcyl246.JPG


Old engine intakes 1, 2, 3:

oldengintake123.JPG


Old engine intakes 4, 5, 6:

oldengintake456.JPG


Do you guys think all that oil will burn off the JDM engine after some long trips? The old engine with 196k sure looks a lot better as far as the intake valves are concerned.
 
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Who knows how the oil got into the cylinders as it could have been on it's side or moved around after removal causing it. No it does not look so good compared to the engine that was running with 2-3 times the miles. Can't tell if it is oil covered corrosion or carbon build up as it looks loose and rough.... I don't it should not be there. Oil analysis would be great info...that will tell you a lot especially since it is obviously used oil. Any oil in the intake, cylinders, etc....will burn out fast with the motor up to temp. Easily within a 100 miles, unless it is serious build up. Thanks for the info and updates, and I hope it is a good motor.
 
Got an oil test kit on the way. In the meantime, I'll go ahead and pull out the old engine. One of the upper bell housing bolts would not budge with my 1/2" impact.

4runner-2-23-01.JPG


I suspect part of the issue was that I was using non impact extensions and a non impact universal joint, so I likely introduced a lot of slop that prevents the impact from doing its job. That same 1/2" impact removed the crank bolt from the JDM engine, so it is pretty stout.

So I stopped by Napa yesterday and picked up a 3/4" to 1/2" impact adapter so that I could use my 3/4" impact. As luck would have it, my tune up kit and timing belt kits, along with my Amazon order of impact wobble extensions and metric flex impact socket set showed up.

4runner-2-23-02.JPG


With that setup, bell housing bolt came out instantly.

So the only thing left now is to undo the flex plate bolts and the last couple of bell housing bolts, and the driver side rear motor mount bolt.
 
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Had some time this morning to work on the 4Runner. Pulled the cover plate off the bell housing so that I could get to the flex plate bolts. What a pain getting those 4 bolts off were with the front axle right there.

The 6 flex plate bolts were pretty easy though. Here's one of them:

4runner-2-25-01.JPG


Next I put a block under the transmission to keep it from dropping when pulling the engine.

4runner-2-25-02.JPG


To put the block under, I raised the engine slightly using this bar:

4runner-2-25-03.JPG


That way I could continue undoing stuff while still using the lift. With everything disconnected and out of the way, it was finally time to pull the engine.

4runner-2-25-04.JPG


Halfway there. I'll definitely leave the fan off when dropping in the JDM engine. There was basically no clearance leaving it on.

4runner-2-25-05.JPG


All the way out.

4runner-2-25-06.JPG


Here they are side by side. Looks like I'll be moving the oil pick up over as well, and the oil cooler and the threaded pipe for the oil filter. Need to pick up new o-rings and what not for those oil pieces.

4runner-2-25-07.JPG


Empty engine bay. I'm tempted to roll the truck outside and power wash it.

4runner-2-25-08.JPG


Wire harness and fuel rails off to the side.

4runner-2-25-09.JPG


The upper a-arm towers don't look all that great and I'm sure the bushings could use replacing with 200k on them.

Driver's side:

4runner-2-25-10.JPG


Passenger's side:

4runner-2-25-11.JPG


Should I hit the rusted area with a wire brush and then apply some POR15?

Now would probably also be a good time to do the lower ball joins and other front end bushings, no?
 
So I made up a list of parts I need to complete fixing up the JDM engine before dropping it back in the truck as well as other maintenance items I figured I'd take of while I'm at it. Here's what I got so far:

4runnerpartslist.JPG


Finding the part numbers for the injector o-rings and oil cooler o-ring and gasket eludes me. Guess I'll just get those from the dealer along with the FIPG sealant.

Anything else I'm missing? (items in green are already here).

As far as vacuum hoses, I guess I'll just get a length of hose with the proper I.D. and cut to size. The ones on the JDM engine are just as bad as the one on the old engine.
 
Fantastic thread! Shows everything needed to do a JDM swap.

Get the O-rings also from the dealer. I will not used any aftermarket gaskets/O-rings.

For the corrosion at the upper A-arm, I'll clean and paint it. Make sure to use a tray under the battery. I have a plastic shoe box lid as the tray and it catches any acid spilled by the battery.

Do you think it is easy to pull the engine out to get the rear crank oil seal than dropping the trans down?

Keep up the good work and we all at T4R enjoy this thread very much!
 
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Spoke to local dealer and they wanted a pretty high mark-up over online, so I just got the part numbers I needed and then placed an order with Toyota of Dallas as they seemed to have best pricing.

So here's my revised list:

4runnerpartslist2.JPG


That all adds up to about as much as the engine itself, but I'm hoping this will keep the truck going for another 100k at least.

If all I was doing was the rear main seal, I would think dropping the trans would be easier, especially with a lift. That's one thing that was pretty cool on my X5, you can drop the engine and trans as a single unit. The front diff is integral to the oil pan. Never seen that before.
 
Had a little time today to work on the JDM engine. 1st I moved the oil filter hollow stud from the old engine to the JDM. Takes a 12mm hex drive.

4runner-3-4-01.JPG


Next I removed the oil cooler and soaked it in diesel for about an hour. Next I dropped it into a bucket of Evapo-rust. Plan to leave it there for a day or two.

4runner-3-4-02.JPG


I then attempted to remove the plug for the oil cooler coolant line that goes into the block. It takes a 8mm hex drive, but it was very tight. I did soak it in PB Blaster for 20 minutes or so. When I couldn't break it free with my 1/2" ratchet, I grabbed the 1/2" impact. At first it did not budge, and then it stripped the plug.

4runner-3-4-03.JPG


Any thoughts on how to proceed? The right size easy out, or?

So here's what the engines look like now on the driver's side:

4runner-3-4-04.JPG


I then went ahead and cleaned up the exhaust manifolds, motor mounts, valve covers and engine brackets. Here are some of the pieces:

4runner-3-4-06.JPG


The crossover pipe was nasty on the passenger side inlet where the head gasket was blown:

4runner-3-4-05.JPG


Fortunately the pressure washer cleared it all out.

I then tried to remove the spark plug tube seals from the valve covers, only to find they were so brittle that the center portion just came apart, leaving the outer section.

4runner-3-4-07.JPG


I don't really want to mess up the inside edge of the valve cover, but short of jamming a screwdriver down between the valve cover and the seal, I'm don't see how I can extract it.
 
Good progress! I stripped my front diff plug once and to get it out I welded a Allen socket into the plug and hit it with an impact. Worked great. I think the best forum the welder really helped.
 

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