timming chain question

[fresh240]

i got a ticking noise comiing from my timming chain. could it be the chain that is worn out or could it also be the cams.

[plane16j]

sounds like chain guards are worn out

[bk00maxse]

i got the same problem on my 2000 max that crap is annoying its better you change your water pump timing chain and the guards this will solve your problem it sounds like the engine is knocking and its loud sometimes

[dickie]

Hey, just an FYI on the timing chain guide removal:

I spoke to a couple Nissan techs (one at the dealership and one that had been working for Nissan for 20+ years and now runs his own shop) prior to doing mine, and they recommended that i NOT remove the side chain guide, and that if i was replacing the chain and tensioners anyways, there was no reason to remove the top guide either.

the deal according to them is: as the chains and tensioners wear, they create just enough slack in the chain that you hear the "ticking" against the upper guide. the components probably have a lot of life left in them after that occurs, which is why Nissan decided to inform ka24de owners about the optional removal.

the procedure, although stated otherwise elsewhere, should NOT include removing anything other than the upper guide. PERIOD.

also, i still have my upper guide after replacing the chain components and have experienced no ticking after over 10,000 miles of use.

[plane16j]

hey thanks for the clarification. it was really informative

[fresh240]

i took off the top chain guide and the top ticking/scratching went away. theres still some coming from underneath. how many chain guides are there.

[dickie]

there is a side guide and an upper guide. if you remove the side one, there is a chance your chain could be just slack enough to jump the sprocket and cause your valves to hit your pistons ruining them.

replace your chain and tensioners.

[fresh240]

is there a way to tight the tensioner. if so would that help

[dickie]

if it's stopped working correctly, replacement is your only option.

[bk00maxse]

have a quick question my timing chain guards tensioners and water pump needs to be replaced but there is a weird problem when i am driving and the temperature control is on the heat side the heat is not on heat comes through the vent slowly and its kinda weird and when i switch to ac the same thing happens what could be the solution to this? will changing the timing chain,guards and the tensionerssolove this problem ?someone answer please this is really freaking annoying i wanna fix this and also the car gets no heat at all i get a lil ac but not like the way it was last summer what could be the problem behind all this

[dickie]

if you have your climate control set on "fresh" ie not recirc, air will pass into the cabin.

if your car is not overheating, you dont have a problem thats affecting the water pump.

[bk00maxse]

the car overheats every once in a while and there is a knock coming from where the timing chain is located nissan told me to change the water pump and timing chain antifreeze backs up into the overflow tank everytime i drive

[Kraffty]

What all is required to remove the top chain guide? I'm new to the forum and just starting to tune my ka24de. I have that same knocking noise, but only at idle speeds. As soon as I touch the gas, it goes away. Could this be just the top chain hitting that top guide? I don't want to take something off that will cause my engine to fail.