14 votes
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Can a bad timing chain result in only a single cylinder misfiring?

"Can a bad timing chain result in only a single cylinder misfiring?" No it cannot. It could be a Bad ignition coil on that cylinder, if there is a coil for each cylinder swap it from another ...
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  • 7,950
10 votes
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Timing chain jumped. Probably bent a piston. Is my engine worth fixing?

Before jumping to conclusions, you could take the rocker cover off and see whether the chain is still connected. The fact that you were able to turn the engine over for a while quickly without it ...
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10 votes
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Why not have drive chains instead of drive (serpentine) belts?

Here are a few factors besides the ones already mentioned that don't work in the favor of chains: chains need lubrication. Do we really want another grease/oil in the engine bay? pulleys would have ...
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  • 39k
8 votes

Why not have drive chains instead of drive (serpentine) belts?

Noise and Cost. It's really that simple. Chains used to be the most common device used for connecting the timing gears. Somewhere across the way someone told the consumer that cars shouldn't make ...
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7 votes

How To Test New Timing Chain Before Engine Closed?

For a four-stroke engine you need to rotate 2 turns of the crankshaft to get to the same position.
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6 votes

Corolla - Coolant leaking from timing chain cover

I think you need to reseal the timing cover I found several images uploaded in a ZIP by an enterprising Corolla owner. Here's an image showing the O-ring you replaced next to the water pump/pulley ...
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  • 39k
6 votes

Timing chain jumped. Probably bent a piston. Is my engine worth fixing?

IIRC on the 2.3 there is no keyway to keep the crank gear and balancer aligned. If the engine is spinning and has compression you probably spun the balancer and it's out of time. Set piston 1 at TDC ...
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5 votes

Timing “CHAIN” ever need maintenance changing

I won't say the timing chain will never break, but they are designed to last for the life of the engine (this applies to most vehicles with a timing chain, not just the Honda ... there are some which ...
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5 votes

Timing chain jumped. Probably bent a piston. Is my engine worth fixing?

I don't see how the timing chain could have jumped or broken in this situation. If the wrench was on the crank pully, and this is what stopped the engine, there was little to no force on the timing ...
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4 votes
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How misaligned can timing sprockets be before valve damage?

In my experience, you get at least one or two teeth out before the engine is physically damaged. However, I would suggest you look into whether or not your engine should be temporarily fitted with a ...
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4 votes

Does my car have a timing belt or timing chain?

From what I have read, the Zetec engines of this period using a timing belt. The image attached shows what looks to be pretty much identical to your engine but with the plastic timing gear cover ...
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4 votes
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Do you need to replace a timing chain?

If your mechanic says 'Timing chains are for life and require no maintenance' then please find a new mechanic. There are loads of examples of timing chains that are designed for life but suffer from ...
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3 votes

Timing “CHAIN” ever need maintenance changing

The parts that go on timing chain systems are not typically the actual chain but the guides and tensioners. The consequence of failure is the same, although you might get a little warning as it may ...
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  • 318
3 votes
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Removing head while maintaining timing chain tension & position

I would use wire (welding rod is a good candidate) or small springs to "hook" the chain either side - obviously the top part stays loose but the bottom part around the lower sprocket stays firmly in ...
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3 votes

BMW 316 - Do I need a new timing chain?

Based on what you've said, that is a hard question to answer – but my best guess is no. The coincidence of the collision and the rattle suggests that the noise has another source, it is unlikely that ...
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  • 14.3k
3 votes

Timing chain jumped. Probably bent a piston. Is my engine worth fixing?

The good news is that everything happened at low speed, because you never actually got the engine running. So whatever the damage is, it will probably be fairly limited. The bad news is that with ...
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  • 2,929
2 votes
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Volkswagen Jetta 2005 2.5L timing chain replacement?

Have you pulled codes from the ECM? Apparently the codes p1340/17748 are associated with timing chain problems. That might help you verify the diagnosis. Timing chain failures are rarer than belt ...
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  • 14.3k
2 votes

Timing chain jumped. Probably bent a piston. Is my engine worth fixing?

If the chain jumped or broke while turning the engine with the starter, what could happen (if you are unlucky) is that a piston hits and bends some valve. The piston would probably survive. If so, it ...
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2 votes

If a manual timing chain adjustment is out of travel, does it indicate the timing chain needs to be replaced?

Well I don't know if this applies to all motorcycles but my GSX-R 600 K7 manual says that you need to change the cam chain: When the distance between some pins of the chain is out of tolerance. When ...
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  • 278
2 votes

High vacuum pressure on idle after timing gear and chain replacement

First, verify the vacuum gauge and the port you are connecting to. 5in is very low vacuum and I suspect the car would idle like crap. Vacuum is produced by the engine efficiently trying to pump air ...
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2 votes

How misaligned can timing sprockets be before valve damage?

given the word "interference" then I would assume that there is little or no room for error on the timing. Interference for engines tends to mean that the valves occupy the same space as the pistons ...
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2 votes

How do I re-rivet a chain pin (with a chain breaker tool)?

I would recommend taking a link off the chain and using a master link (pictured below). This is typically a link with a removable plate and is commonly used to reconnect chains that have been broken. ...
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2 votes
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Does the crankshaft revolution count matter relative to combustion stroke?

I assume that you are talking about a four-stroke cycle, so if you rotate 360 degrees then the engine will be at TDC changing from the exhaust to the inlet stroke which is not TDC for the combustion ...
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2 votes

2011 f150 ecoboost timing chain and valve train

Mitchell shows 12.3 hours for the timing set and an additional 1.6 hours to R&R the cams on both banks. Probably add a half hour to R&R the vct solenoids. The actuators are figured into the 12....
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2 votes
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Importance of marking timing marks on timing pulleys or sprockets when replacing camshaft

A camshaft can only be attacked to the camshaft sprocket in 1 orientation which you can see when you look at the camshaft sprocket. (See below image for an example) It is important to know the ...
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  • 1,334
2 votes

Importance of marking timing marks on timing pulleys or sprockets when replacing camshaft

Most (all) engines will have timing marks and usually manufacturers provide locking mechanisms or simple holes on the pulley that locate to a hole so a dowel or pin csn be used to locate the position ...
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  • 34.4k
1 vote
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replace engine chain sprockets?

The timing and balance shaft chains on these Ecotecs are very long-lasting, and usually the sprockets don't need replacing - what happens is that the chain stretch plus wear on the guides goes beyond ...
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  • 1,087
1 vote

Mazda question re timing chain

The owner's manual for 2013 Mazda3 specifies two different maintenance schedules: Schedule "A" for normal use Schedule "B" for severe use Schedule A, normal use, calls for the drive belts every 37,...
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1 vote

2011 f150 ecoboost timing chain and valve train

Alldata says 10.8 for the cams (but all four), and figure another 2.5 for the timing chain and guides/tensioners. I doubt you need VCT solenoids, but the actuators won't add much (maybe an hour) if ...
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  • 12.2k
1 vote

BMW 745Li jumped time

Generally speaking, it depends how much the chain skipped. Some engines have more tolerance than others. Reset the timing chain to the proper time and it should be safe to run a compression test.
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