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Message: <blockquote data-quote="reivaxtorres" data-source="post: 489556" data-attributes="member: 8890">well true, if you already have the chain out it doesnt hurt to replace it, and all in all prob not a bad idea. i checked mine and it looked fine, so i just reused it. but ok, onto the pics you requested. timing chain guides: <a href="http://drobnak.com/dave_car/pics/AlumBlock/timed.JPG" target="_blank">http://drobnak.com/dave_car/pics/AlumBlock/timed.JPG</a>that picture is of a cobra motor, but the primary (long) chains on that motor are the exact same as ours. the guides are what the chain slides on between the two gears. one is straight, while the other is curved. these will, with time, change color depending on how worn out they are. the dark red that you see will slowly start getting lighter. since you already have everything apart, might as well replace them as preventative measure now rather than later when they break. water pump nipple: <a href="http://img508.imageshack.us/img508/3193/dsc06293lc8.jpg" target="_blank">http://img508.imageshack.us/img508/3193/dsc06293lc8.jpg</a> ; <a href="http://i13.photobucket.com/albums/a267/ender03/Re-sized%20Photos/Picture061.jpg" target="_blank">http://i13.photobucket.com/albums/a267/ender03/Re-sized%20Photos/Picture061.jpg</a>when you remove the intake manifold, you will notice that there is a metal pipe that goes there. that metal pipe is called the heater return tube: it routes the coolant from the heater core back to the water pump. its only held on with two bolts that go behind the drivers side head, and then it simply slides out from behind the water pump. well, where it slides into behind the pump, thats the water pump nipple. the NPI nipple is a little longer (on the left) than the PI nipple (on the right). you need to swap these out so the proper tube will fit (because the PI manifold is deeper than the NPI manifold, it requires that you use the PI tube which is routed a little differently). the nipple has to be removed by tapping it out TOWARDS the water pump....which means the water pump has to come off. its installed the same way, by tapping it in FROM the water pump towards the back of the engine. if you have a 96 or 97 model, you will need this part. if you have a 98, you WILL NOT need this part as our cars already have it.2nd coolant sensor: <a href="http://img482.imageshack.us/img482/5118/dsc06321wg5.jpg" target="_blank">http://img482.imageshack.us/img482/5118/dsc06321wg5.jpg</a>ok, for this one you have to look at the crossover tube (in the picture, the aluminum part of the intake manifold) on your car and compare it to the one from the 02 engine. on your car, it might be a plastic crossover tube rather than an aluminum one. you will see that on your engine, you have two sensors there; one controls the gauge in the dash, the other tells the computer how hot the car is. on the 99+ models, ford deleted one of the sensors and made the gauge read off the ECU sensor. what you need to do is drill a hole (I believe its a 3/8" NPT size) for the second sensor you have. this is made easy because on the PI manifold, ford left a spot for the sensor, they just didnt drill the hole. in the picture above, the location is right behind the thermostat housing.if you need anymore help, let us know</blockquote>