2.7 engine noise
Well it seems most people with a 2.7 and problems relating to it, post in this forum so I'll post something I just learned here. Don't know if some of this has been said but I'm not about to read every 2.7 post to find out.
The two main causes of 2.7 engine failures seem to be the sludge buildup problem and the timing chain problem. As far as the sludge thing goes most people will say it's due to lack of timely oil changes. But that's not what this thread is about.
The other problem which is the timing chain letting go and then the resulting engine damage when it does let go. My concern is that some blown 2.7's can be misdiagnosed as an automatic sludge problem when in fact the culprit was the timing chain tensioner. Wether they are misdiagnosed on purpose or not, who knows. This is where your trusted mechanic comes in.
If you have an engine noise out of the ordinary it's in your best interest not to run the engine any longer especially if it's coming from the timing chain area up front. If the timing chain lets go, you're looking at alot of engine damage. If the noise is from the timing chain and you can keep it from getting worse, you might be able to fix it with just a timing chain tensioner. Previously I thought the tensioner was located within the engine which would require a partial teardown to get at it. Well, it is within the engine but there's an access plate to get at it located on the passenger's side of the engine near the front and right below the rocker cover. While not as easy as the 3.2's or 3.5's, never the less it is accessible from the outside.
Now I don't know at what point the Mopar timing chain tensioner was changed to a new style with larger oil passages but it would be worthwhile changing the tensioner to the newer style to prevent an expensive engine change.
The 2.7's are actually built stronger than the 3.5's or 3.2's but the above two problems aren't giving it a good reputation.
The timing chain tensioner is actually an easy change. It sits on the side by the #1 cylinder, held by two bolts, undue the bolts and it pops out.
Last edited by YB Normyl; 06-05-2004 at 08:13 PM.