I bought this taco with an engine issue. Coolant was flowing into cyl1. When I bought it, it was unknown whether it was a head gasket or a cracked head. I needed to find out which as I had an opportunity to by a used engine if I needed a head. Here is what I did:
1. FIRST, I removed the ground from the battery. No sense having things short. The next thing I did was remove the airbox connector. See picture 1airconnector.
2. I then wanted to remove the exhaust manifold, but had to remove the EVR pipe from the exhaust manifold. (My exhaust manifold is cracked!
) See picture 2Evr.
3. The other end is on the intake side. Picture 3Pipe. There is also a bolt on the back of the head that needs to be removed so the pipe can be removed.
4. I then removed the wiring harness connections on the exhaust side. See Picture 4Harness.
5. I had trouble with getting the connector off the distributor. Since I had to remove the distributor anyways, I did that now so I could rotate the distributor and see the connection from the bottom. There is a little tab you have to pry up to remove the harness connection. See Picture 5Dizzy.
6. The head will not come off with the belts attached, so I first removed the bolt for the dipstick and then removed the belts by loosening the idler pulley bolt then loosening the tensioner bolt until I could remove the belt.
7. The heater hose is attached to the head, so it had to come off. The top end is easier to access. Pict 7HeaterHose.
8. The intake stay would have to come off even if I lifted the intake with the head. So it was next. Pict 8IntakeStay.
9. Next the valve cover had to come off. Picture 9ValveCoverRemoved.
10. Don't forget about the chain tensioner. That was removed next. Picture 10Tensioner.
11. The camshafts have to come off to access the head bolts. At least, I didn't see a prudent way to removed the head bolts without removing the camshafts. The end caps are tight, but they have tabs you can pry with a screwdriver held perpendicular to the head. I got them off keeping careful attention to which went where. They are lettered but once I got them off, I found that they were also numbered E1-5 and I1=5 (the marks are under the oil drops on top. I was careful to keep them in order just in case. Next was the head bolts. Picture 11Headbolts
12. Finally I was ready for the head bolts. I had to break out my 14mm 12 point socket and a LONG ratchet. The bolts at the ends were particularly nasty tight. Of course, these are loosened in sequence a little at a time from outside to in. See the manual!
When I pried the head up, I could clearly see the damage to the head gasket. Picture Headblown1.
I subsequently had to split the intake manifold and remove it from the head to get the gasket off. To remove the intake, the fuel supply line to the fuel rail had to be disconnected. It is RIGHT in the way of one of the bolts. I also removed the return line in order to lift the head. Once the head gasket was removed, the damage was clear.
See pictures headblown2 and headblown3.
There is a LOT of gunk in the coolant ports in this gasket. Look at the middle cylinders. Crud was PILED up in these ports. Is this a byproduct of using the wrong coolant? Radiator stop leak?