2012 Focus Timing belt or chain???? - Focus Fanatics
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Old 03-10-2012, 01:04 AM   #1
focusnfuture
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2012 Focus Timing belt or chain????

One of the things I like about my Matrix is that it has a timing chain, not a belt that needs to be changed every 80,000 miles, etc. With me putting about 30K miles per year, I'd be changing the belt quite often.

So, what does the focus have and if a belt, when does it need to be changed??? Thanks


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Old 03-10-2012, 01:33 AM   #2
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Chain
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Old 03-10-2012, 04:16 AM   #3
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Yup second CHAIN.
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Old 03-10-2012, 07:35 AM   #4
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Duratecs have a chain. One of the reasons I dropped the diesel VW from consideration. All that technology and still a belt? Not exactly the same (actually longer chains) but my F-150 has 185,000 miles on its SOHC chains and runs perfectly. You're on the right thought track.
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Old 03-10-2012, 09:25 AM   #5
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Old 03-10-2012, 09:40 AM   #6
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What is the interval? 100k miles
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Old 03-10-2012, 09:50 AM   #7
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Quote:
Originally Posted by AJ_BS View Post
What is the interval? 100k miles
The timing chain does not have an interval, it's designed to last the life of the car. Although it is possible it might need periodic adjustment if it starts to make noise, etc.
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Old 03-10-2012, 09:57 AM   #8
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Quote:
Originally Posted by AJ_BS View Post
What is the interval? 100k miles
You replace the chain when you rebuild the engine, or if it lasts longer than 200k miles. It's the same as other chains- like some Nissans, for example.

I disagree that belts are lower tech than chains. Chains were first, although shorter on push-rod engines. Chains have a problem with twisting out of shape at high speed, which is why you have tensioners on chain setups. This is due to weight and centrifugal forces. Belts don't have as much weight, much less friction, require no oiling, but don't have as secure of a "grab" as a chain through a sprocket. Those have tensioners and guides also to prevent hopping. A belt can be made to last as long as a chain- ask any BMW owner- their belts are nearly 1 1/2" wide and last 200k + miles. The problem is just that- in order for a belt to be made to last as long as a chain, it takes up 5x the space of the chain. Using a chain allows Ford and Nissan to take up the excess space a belt would use with more space for wider cylinders. These engines are huge anyway. IDK If any of you are old enough to realize it, but a freaking 2.0 GDI engine is not much smaller than an old 302 in physical size. It's surely lighter, but these engines are large- go check out the old pushrod 4 cyls that are out there- those are tiny in comparison.
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Old 03-10-2012, 10:30 AM   #9
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chain and as per ford thirs no service intervals. ;)
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Old 03-10-2012, 10:31 AM   #10
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Chain, with no adjustments (hydraulic tensioners). I REALLY REALLY hope our tensioners are made with a flat machined surface mated to the block like the proven way its been done for years (haven't pulled one apart yet and the service manual doesn't really say) because the newer 5.4Ls (I think 2008 was the changeover) in the F150s are turning into a money pit with their crap tensioners with the flimsy silicone bead on the tensioners blowing out and causing loss of oil pressure to the heads and all kinds of cam phaser problems. They went from a steel tensioner with flat machined surface to a phenolic tensioner body with a crappy printed seal. We see at least 1 per week. There was a "hell week" last summer where our relatively small shop did 6 engines in one week because of this. I was happy because I did 4 of them. LOL
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