91 Toyota Hilux Surf

You have a major task in front of you .The wiring and computer are not the same. get the computer and wiring loom from the donor engine vehicle. You will have to rework the exhaust system ,cooling system, transmission and drive shaft, rework the front suspension springs because of extra weight. Do check with the main roads department or other body as they may refuse to register or insure it.

have injectors or glow plugs removed and crank engine if water cones out. your engine might have experienced overheating and you have a blown gasket or a cracked cylinder and allows water into one or more cylinders.

Follow these steps:
1. Loosen off the distributor coil.
2. Connect the timing light lead clip to cylinder marked as number 1 cylinder spark plug lead.
3. Connect the red wire clip to the positive battery terminal
4. Connect the black clip wire to the negative battery terminal.
5. Put the gearbox is in neutral, and pull the hand brake
6. Start the engine
7. Turn the throttle knob until the engine is revving at 600rpm
8. Check the crank pulley, and look for the crank pulley mark, if the mark is not visible switch off the engine.

For a step by step guide, follow this link: https://www.autozone.com/repairguides/Toyota-Cressida-and-Van-1983-1990/Firing-Orders/Ignition-Timing/_/P-0900c1528008141e

Blown head gasket.

If you got water in the intake, you probably also got water into the cylinders. With any luck, you haven't bent any connecting rods. The starter will not turn the motor over because it is impossible to compress water. Put the starter back in and remove the spark plugs and try it again. If there is water in the cylinders, the starter will now crank the engine over and spit the water out of the spark plug holes. You will want to crank it over several times and dry your spark plugs off before reinstalling them. Hopefully, nothing is bent or broken.

I would put a thermal gun on and aim it at your water pump if it fluxuates pretty steady then that would indicate the radiator would prob. be the concern

The damper pulley, on the end of the crank is what drives the belts for pretty much everything else. the engine will overheat, the alternator wont charge, the power steering wont work, the air con wont work,
the back of the pulley has a machined surface that runs inside the front crank seal.
Is there a reason not to believe the toyota mechanic, or did it seem expensive?
The front damper pulley (harmonic balancer) can be $100 or more plus the seal and I believe the radiator needs to come out to complete the job

18ft lbs for waterpump bolts & 80ft lbs for balancer bolt

Ready? Remove all the stuff in the way of the old belt. Radiator, pulleys, belts, covers, have a new tensioner to put on? How about that water pump? Get a socket big enough for the crank pulley bolt, you just want to turn the engine over a little. Get the new belt with marks on it, they come in real handy, and when you are ready to let the old one go, bring the motor around to tdc. There is a mark on the crank pulley, when that aligns, the cams should be on their marks as well, clamp the cams from moving, they are under spring tension, they won't go far, but just in case, remove the belt, line up the new one with the marks on it to the marks on the cams and the crank, pull the pin on the tensioner, and you should be all set. Put it all back together, fill the radiator back up. Hope this helps.

Hey NewK, Try looking under the Cam Pully If ya got the radiator out Its at the lowest point Fuunyist thing I ever seen but thats where it is. Heres a tip if ya radiator is still in the vehical Use a small mirror to help you see the Underside of the pully......................Tight Nutz, Donkuz.