Depends on what kind of vehicle it is. On most you have to drop the oil pan, pull the water pump, pull the valve covers and sometimes the heads, but not always, and pull the timing chain cover to get to it. You will probally have to pull the distributor out as well. There should be timing marks on the timing pullies that need to be lined up when you change the chain. Your best bet for this job is to get a good manual and read up on it, then follow it step by step.
A loose timing chain can only be repaired by replacing the timing chain . A loose timing belt means the belt is worn out or the tensioner is worn out. Replace worn parts.
You cannot adjust the tensioner. It is automatic, and takes out the slack of a stretching/aging cam chain. Once the tensioner has fully extended, the only fix is to replace the chain and the part of the tensioner the chain rides on if it is worn.
That ACTUALLY means that you probably didn't need to replace the timing chain in the first place. If you did it yourself, did you replace the tensioning rails? Check to see if they're worn. Note that one of the tensioning rails connects to a piston actuated tensioner assembly; if it isn't functioning properly the timing chain tension will not be maintained. Also, if the engine has low oil pressure, the tensioner will not function properly and you may end up with a loose timing chain.
If the timing chain on your Lincoln LS is worn out then it should be replaced. A worn out timing chain can jump a link, or more, and the engine will ultimately not be able to run. Normally the timing chain will last the life of the engine.
Worn belt or belt that has stretched to the point the tensioner cannot keep the proper tension. The tensioner can also be defective. Replace the belt and the tensioner.
Yes, you could. Is it a good idea? Probably not. If the tensioner is worn so must be the chain.
You did not list Make, Model, Year, or Engine Size. So all I can tell you is that the vast majority of vehicles with a timing chain have a self tensioner that keeps the tension tight. If the chain it loose or noisy then it is more than likely worn out or the tensioner needs replacing or both.
When it's worn out!
No, not unless it is worn out. Timing chains normally last the life of the engine and are replaced when the engine is rebuilt.
This repair is best left to a professional. Why are you changing the timing chain? This is not required unless the chain is loose or worn. It should last the life of the engine.
Your timing chain may be worn to the point it is jumping a tooth and thus changing the timing. If you can hear the chain that is a good sign it is worn. I would inspect the timing chain.
The timing chain follower is worn causing a slack condition in the chain. the chain oscillates and so does the timing.
It is worn out or the tensioner is weak and needs replacing.
Normally a timing chain will last the life of the engine. Replace it only if it becomes noisy or you have performance issues related to a worn chain as in jumping time.
Generally speaking, if you have properly maintained and not abused the engine, the timing chain should last until the engine is worn out. If you find that you have any burned valves, by all means replace the timing chain, pulleys and chain tensioners. But a timing chain is not like a timing belt. A belt will wear out after 80K to 100K miles. The chains do age, but since they are constantly in an oil bath, if you've kept the oil clean the chain should last a long time.
All timing chain mechanisms have timing chain tensioners. Check to see that the tensioner mechanism is functioning correctly. Some are tensioned using spring tensioners, some use oil pressure, and some use a combination of both. The 2.4 liter quad 4 engine uses a fairly long timing chain, which wraps around the crank gear, water pump gear, and the 2 cam gears. The chain only grabs 8 teeth of the cam gears, a spring/hydraulic tensioner, to the upper left of the crank gear tensions the chain, but also 3 plastic guides help to hold the chain tight. If the tensioner is worn or the plastic shoes break, and yes they can break, or if the chain or cam gears are worn it is possible for the chain to jump, especially at high revs.
Either the belt is worn out, incorrect belt, drive gears are worn, or the tensioner is defective.
Not unless it is worn out. Timing chains are designed to last the life of the engine and are normally replaced during complete engine overhaul.
Worn timing chain.
It has two chains. CAUTION: At no time, when the timing chain(s) are removed and the cylinder heads are installed, may the crankshaft and/or camshafts be rotated. Failure to follow these directions will result in valve and/or piston damage. NOTE: Because this is not a free-wheeling engine, and it jumps time, there will be damage to the valves and/or pistons and will require the removal of the cylinder heads. The camshaft sprockets should only be disassembled from the camshafts when one of the components is to be replaced. Remove Valve Covers, Oil Pan and Engine Front Cover. Remove crankshaft position sensor pulse wheel. Rotate engine to No. 1 top dead center (TDC). Remove two bolts retaining RH timing chain tensioner to cylinder head and remove timing chain tensioner. Remove RH timing chain tensioner arm. Remove two bolts retaining RH timing chain guide to cylinder head and remove timing chain guide. Remove RH timing chain from camshaft sprocket and crankshaft sprocket. Remove two bolts retaining LH timing chain tensioner to cylinder head and remove timing chain tensioner. Remove LH timing chain tensioner arm. Remove two bolts retaining LH timing chain guide to cylinder head and remove timing chain guide. Remove LH timing chain from camshaft sprocket and crankshaft sprocket. CAUTION: Do not rotate crankshaft and/or camshafts or possible engine damage may occur. Inspect the plastic running face on timing chain tensioner arms and timing chain guides. If worn or damaged, remove and clean oil pan and oil pump screen cover and tube. Installation NOTE: If engine has jumped time, make sure that all repairs to engine components and/or valve train have been made. Then rotate engine counterclockwise 45 degrees. This will position all pistons below top of deck face. Install Cylinder Heads as outlined. Locate the copper links on the timing chains. They will be 180 degrees apart fro one another on each chain. When installing the chains on the gears, line one copper link on the chain with the alignment mark on the crank gear, and line up the other copper link on chain with the cam gear mark on each respective side of the engine. On the crank gear, both chains line up to the same mark. Install timing chain guides . Install timing chain guide retaining bolts. Tighten to 8-12 Nm (71-106 lb-in). NOTE: Crankshaft sprockets are identical. They may only be installed one way. Install LH timing chain on camshaft sprocket. Make sure copper link of timing chain lines up with timing mark of camshaft sprocket. Install LH timing chain on crankshaft sprocket. Make sure copper link of timing chain lines up with timing mark of crankshaft sprocket. Install RH timing chain on camshaft sprocket. Make sure copper link of timing chain lines up with timing mark of camshaft sprocket. Install RH and LH timing chain tensioner and secure with two bolts on each. Tighten bolts to 20-30 Nm (15-22 lb-ft). Lubricate timing chain tensioner arm contact surfaces with clean engine oil, and install RH and LH timing chain tensioner arms on their dowels. With a suitable C-clamp around the timing chain tensioner arm and timing chain guide, remove all slack from timing chain while using caution not to bend the timing chain guide. Remove lock pins from timing chain tensioners and make sure all timing marks are aligned. Install Engine Front Cover, Oil Pan and Valve Covers. Start engine and check for leaks and proper operation.
Yes, if the timing chain or gears are worn, acceleration can cause the chain to jump.
Hello, I saw your post on how to replace The Timing Chain Tensioner on an 04 Maxima. I have an 02 with the same engine. I just replaced the tensioner today...Took me 4 hours, I was very nervous. The chain tensioner is located on the left side(passenger side) of the engine. There's a cover just to the side/below the Passenger side motor mount. There are 3 bolts. In order to make it just a bit easier to access the cover, you should move the power steering reservoir and hose to the top of the engine. After I removed the 3 bolts, I had to pry off the cover(it had gasket sealant) and then I found the chain tensioner. There are two bolts holding the tensioner in place. I removed the lower bolt first, then removed the upper bolt. You're normally supposed to push the tensioner guide back and put a pin in the hole....My tensioner was so worn out, It came out in one piece. After pulling it out, I had to install the new one. I used a coat hanger to grab the timing chain guide and to keep pressure on the chain itself. Eventually i found the holes for the screw, I installed the tensioner, after tightening both bolts, I pulled the pin out and the tensioner spring loaded into place. It worked very well after that. Good luck! Pace yourself! it's a good afternoon job! but it'll save you a ton in money!
Broken or weak spring on the timing chain tensioner? Worn out timing chain doesn't seem possible on a Festiva, mine's never been replaced and just turned 334,000 miles. I once had a problem with a Chevy Luv that threw me. It idled perfectly, like a clock, with 120 PSI on all four cyl, but rev it up any, and it backfired and went back to idle- Timing chain tensioner problem, they have two tensioners or guides.....
The chain will become noisy and you may experience poor performance.
yes All Jeep 4.0L have a timing chain. It is only changed if excessively worn or damaged.