Originally Posted by brains06
@ramvan I'll have to check that out but we found that the radiator was fine as was the waterpump...or so it seems. My problems seems to be caused by this crankshaft position sensor. After I reinstalled my radiator I started the truck and my uncle hooked up his scan tool. He backed the timing down and all of the sudden the truck ran ALOT better. No backfiring and it had some pickup. It wasnt all the way right but he said that if that sensor is reading wrong its gonna throw off alot of other sensors as well as cause the engine to bog and wanna overheat. I was able to get the truck home and while it ran warm (needle touching the far side of 210) it didnt overheat. I got it home and changed the sensor and now it seems to run like it did before he messed with the timing. So today I'm gonna try and get the timing set, though of all the things I've done to a car this has never been one of em.
I'm almost tempted to put the old sensor back just to see what gives.
Usually when it's a timing chain you don't change the chain regularly like you do a belt (every 60K). But you would change the chain if it stretches or jumps or if there is excessive sprocket wear of course. You may consider doing a timing advance or retardation depending on your use if you prefer more torque low end or better gas mileage.
Be sure when you do your timing to make sure the rotor is pointed at the number one cylinder you can rotate the crack shaft with a socket wrench and turn it clockwise I believe. Be sure to disconnect your negative terminal on the battery for safety. If you do the timing be sure you have bought a timing chain cover gasket set you can pick one up from autozone for 9.99 it's a felpro set comes with gaskets for the water pump and timing chain cover it should also come with a seal for the crank shaft, be sure to replace that seal while your at it. Also I recommend you buy some permatex HI-Tack Gasket Sealant and put that on both sides of the gaskets. And when you put the water pump back on the timing chain cover use Permatex PTFE Thread Sealant on the wet bolts. Also be sure to put some Permatex Ultra Grey RTV on the corners of the oil pan gasket. Don't use anything very abrasive to remove the old gaskets just use a scraper and some gasket remover, I like to use Brake Cleaner or Carb Cleaner, Carb Cleaner has acetate and toluene much like goof off so it does a fine job and you can get a can from autozone for 1.99.
MAKE SURE YOU TORQUE everything properly. You don't want bolts to come loose then you have parts falling off lol. Check the aluminum bolts for stretching which you will probably find, any bolts that are stretched I would replace them else wise they will snap when torquing (happened to me).
Any questions or need help yell at me and I will try to help ya best as I can!