Looked through the warranty manual and didn't see any mention of recommended timing belt service interval (!?!?)...only thing I found was accessory belt change at 90k...

Does this mean (gasp!) that the Patriot's got a chain rather than a belt? :banana:

Most likely... not sure but most likely.

If so, that'd rock... that's a $500 service that I wouldn't have to worry about!

The "World" engines do in fact have a chain that drives the dual cam system.
Here's a link to a nice cutaway of the engine.
http://www.allpar.com/mopar/world-engine.html

:smiley_thumbs_up:

Ohhhhhhhhhhhhhhh CHAIN (Homer Simpson):D

now the lifetime warranty says it covers timing chain/belt. so does that mean at certain interval chrysler will replace it before it breaks, and if so, do they stick you with installation, sure they throw in the 5o dollar chain for free but you pay 800 dollars for install.

The lifetime warranty covers Labor also, as long as the failure was caused by the powertrain through normal wear and tear.

i think it would have to fail (or indicate that it was about to fail) before they'd replace it...

luckily with a chain that will be a long ways down the road.

i think it would have to fail (or indicate that it was about to fail) before they'd replace it...

luckily with a chain that will be a long ways down the road.

Usually the thing you have to get done every now and then with chain driven timing is replacing the chain fastener. This is becouse the chain will lengthen over time as it's just metal. If there's no fastener, then the entire chain should be replaced.

I just did the first chain fastener swap on my Jeep Comanche (2.5L four, built 1985, 120k miles on it), but becouse even with "low" miles - it should have been replaced years and years ago as the chain had been able to 'rattle loose' and it had eaten away the gears a bit so I had to replace not just the fastener, but both gears and chain as well. Thankfully the chain hadn't jumped a notch yet...

So even if the chain has a very long lifespan, it's not exactly maintenance free. (And yes, it's still much better than a timing belt).

oh and btw, ihan hyvää kuuluu ;)

My 1983 CJ8, my avatar, finally jumped a tooth in the timing chain. 177000 miles. Man, things just don't last these days.;)

So of course this couldn't happen in June. It has to happen just when Plowing season is right around the corner.:doh:

Plowing season isn't just around the corner, it's here! On the U.P. the forecast for early next week included mixed rain/snow showers.

My old 84 Ford F250 had a chain...the chain was fine, it was the cheap plastic gears that shattered. I repleaced them with after market metal ones.

I noticed in my owners manual, under maintenance, that they recommend replacing the timing belt on the 2.4L engine at something like 90,000 miles.

I thought that was kind of funny because all of the World Engines use a timing chain.
The chains are actually supposed to be a maintenance free item. Under normal conditions, they never have to be replaced.
The lifetime warranty will only cover items that break, not maintenance items, so the chain would have to break for it to be covered.

Also check this thread

http://www.jeeppatriot.com/forum/showthread.php?t=5214&highlight=chain+belt