My 240 has been idling irregular for the past couple days. I took out the aiv like recommended by some. It didnt fix the problem. I opened the hood this morning and i hood a small sscrapping like sound coming from the engine. I recently fixed nd put in new parts for the bottom timing chain so it cant be that. But when i put it back together the top chain was a lil loose but i left it because when i cranked the engine it would tighten by oil pressure. JW if it is the top timing chain that could be causing my problem.

 

Its the top tensioner. You fixed the wrong one lol

 

no i didnt fix the wrong one cuz the bottom one had no guide and the tensioner was completly jammed.

 

and i cleaned out the top tensioner also when i put it back together so i thought it would be ok

 

yea hyjynx said it right you fixed the wrong one. check again

 

did u not just read what i wrot at all lol i did have to fix the bottom it had no guide it was in pieces in the oil tank and the tensioner for that was shot had to buy a new one. The top was fine at the time but a lil loose at a certain spot when u cranked the engine i thought it was ok because it would tighten right after because of the pressure. Is that normal for the top thats all i wanna know?!?!?!

 

...once again its your top tensioner.

240's have a problem with the top tensioner getting loose,a nd after awhile just not working well, thus leading to bigger problems.