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engine clearance

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Old May 19, 2010 | 05:56 AM
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JEEP THRILLS
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From: GRANDE PRAIRIE, AB
Default engine clearance
can the piston hit a valve if the timing chain broke.
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Old May 19, 2010 | 07:09 AM
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Yes. The 3.8 is an interference engine.
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Old May 19, 2010 | 07:34 AM
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Originally Posted by ronjenx
Yes. The 3.8 is an interference engine.
That is no good.

Do you know if Chrysler uses a chain or belt in these motors?
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Old May 19, 2010 | 07:35 AM
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Originally Posted by Locklain
That is no good.

Do you know if Chrysler uses a chain or belt in these motors?
It is a chain.

In my opinion, that makes up for being an interference engine.
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Old May 19, 2010 | 07:38 AM
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Originally Posted by ronjenx
It is a chain.

In my opinion, that makes up for being an interference engine.
I agree, if it were a belt I was going to cry myself to sleep since I would be rolling around on that "questionable" life expectancy soon.
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Old May 19, 2010 | 08:39 AM
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just out of curiosity can you name a car that use a timing belt in a engine 6 cyls and more ?
my believing is today all 4 cyls use belt and anything bigger use chain.
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Old May 19, 2010 | 08:50 AM
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Originally Posted by Pape
just out of curiosity can you name a car that use a timing belt in a engine 6 cyls and more ?
my believing is today all 4 cyls use belt and anything bigger use chain.
A quick search revealed:
2002-2006 Toyota Camry 2.4L 4 cylinder has a chain.
2004 and newer Toyota 3.0L and 3.3L V6's have timing belts.
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Old May 19, 2010 | 09:17 AM
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Keep in mind that the 3.8 liter is a overhead valve design with the cam in the block. The camshaft is closely coupled to the crankshaft by the timing chain and activates the valves via pushrods. Timing chains rarely fail.
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Old May 19, 2010 | 09:46 AM
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I didn't realize that the 3.8 still had a pushrod design. Seems most engines now days have the cams in the heads.
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Old May 19, 2010 | 11:39 AM
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Interestingly, the reason I have a Wrangler is because my 3.7 liter Liberty had a CHAIN tensioner failure (at 125K) and it took out all the valves. I traded it for a Wrangler Unlimited with the good old 3.8, pushrod motor.

Steve
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