LX 5.0

Hope this dosn't sound to dull. I know on a Saab 9000 there is a timing chain that needs to be tightend ever so many miles. Whats the deal with the 5.0 HO?

FiveLiterRiceEater

you just replace it after a period of time, because it gets "streched out". you replace it and the gears.

or you could also get a gear drive system and get rid of the chain all together

LX 5.0

How often will I need to replace it? (miles)...

gr84u

Yeah good question, is it easy to access and change? I am trying to replace most wearable things since I bought it over a year ago and have done so to most things on the car.

FiveLiterRiceEater

you dont have to replace it very often. i think every 100k.

to get to it you'll have to remove the water pump and timing cover. its basically 2 gears. a small one on the crankshaft, and a large one on the cam. the small one slides on and the large one is bolted to the cam with 3 bolts. pretty simple to replace, you just have to align two marks when you put it on and have the engine at top dead center.

5.0stanger

I heard you can't get a drive gear set because of the knock sensor, how do you get around that?

FiveLiterRiceEater

i didnt know these had knock sensors. but you can put a resistor in the knock sensor circuit so the voltage will never go out of the sensor range.

basically a knock sensor is a piezo crystal or some crap. when you hit it hard enough, or it gets a big enough vibration, it creates a voltage. if you wire a resistor into the circuit, the voltage wont pass the resistor, therefor, no check engine light, and no trouble code, and no problem

5.0stanger

Yeah, there is a knock sensor in the lower intake. The gear sets make a lot of noise anyways, I like the quiet unless it is a supercharger noise...

FiveLiterRiceEater

in the lower intake? is it in the lifter valley or is it attached to the intake itself? i didnt notice one on mine when i swapped my intake.

5.0stanger

I believe it is on the opposite side of the air charge temp sensor, just a single wire hook up.