Question about 1997 Nissan Pickup

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1997 nissan pickup 4wd, just had timing chain replaced , now have noticeable knocking noise coming from valve cover ? mechanic says need new stack shims on valve rockers ?

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Not likely. You have a 4 cyl engine with over head cam. It has hydrolic lifters. If it wasn't making the noise before he replaced the chain, then its something he did...or didn't do. If it was making the noise before, most common reason would be 1 or more lifters not pumping up. If you have a six cyl, no one changed the timing chain, (It doesn't have one!) The 3.0 6cyl has a belt.

Posted on Jun 21, 2009

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I have a 91 22re 4wd 5spd when it first starts it makes a loud clacking noise that goes away after a few seconds what is that noise my rocker arm shafts and rocker arms are in good condidion


Sounds like it could be your timing chain. There is an automatic chain tensioner and over time when the chain gets a lot of miles on it the plastic guides and chain have to be replaced. Typically around 125,000 miles or more. You can remove the valve cover and look down the front of the engine to verify this. Look to see if the plastic guides are still in place and that the chain is not rubbing a hole in the front timing chain cover. Let us know your findings.

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This 2002 nissan 2400 pickup has had the timing chin replace by my mechanic. he swears up and down he did it correctly. After letting another mechanic so-call mechanic took the carburetor screws in and...


Hi, your diagram is below. Also threw in the timing marks. Not sure how hard it is to get the top cover off the timing chain as I have not worked on this engine. If you could get a peek at those timing marks you could verify valve timing. Let me know if you have more questions, and thanks for using FixYa.

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Tears timing chain ajuster off nissan1989 four times


I'm assuming that you are talking about 1989 Nissan Truck 4WD 3.0L FI 6cyl.

In this models, the Z24i and KA24E engines do not use the pin counting method for finding correct valve timing. Instead, set the timing chain by aligning its mating marks with those of the crankshaft sprocket and camshaft sprocket. The camshaft sprocket should be installed by fitting the knock pin of the camshaft into its No. 2 hole. On the Z24i engine, the No. 2 timing mark must also be used.

Excatly, what is the problem? Adjuts timing procedure?

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I would venture to guess that a timing chain guide broke and the chain chewed a hole thought the timing cover. The timing cover also has coolant passing through it where the water pump is attached. If you were running a multi viscosity oil, even it it were a 20-40 and got surprised by a zero degree day, I doubt seriously, it would cause that to occur. That series engine had problem s with timing chain guide failures. However, there usually is some chain rattle well before a disastrous failure. Most of my customers noticed the chain noise before it has caused catastrophic damage.
Sorry you have suffered such a loss. Good luck on your repair. A used timing cover would be the cheapest route. A place in Dallas called Bishops, buys engine cores, dismantles them, evaluates them, cleans the good parts up and sells them at very reasonable prices. They ship all over the country.

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valve lifters make a kind of rattly knocking noise! which sort of follow engine revs.if they are gone you may need a new camshaft as well, best to do itr all at the same time and are sold as a kit.are you sure there is a new noise or are you just listening harder?

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Timing


bet the workshop manual as sometimes you have to turn the engine over twice to get the marks to line up
if it was off 4 links , it probably would not start and if it did would be all over the place

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What will my car sound like, if the timing chain needs to be replaced? I have a 1997 Nissan Altima.


there will be a rattle the front of the engine. the end with all your pulleys and belts on. And it will be hard to work out if it's in the engine or the pulleys.

It is a common that a TICKING coming from the front of the engine is the timing chain guide.

This -->LINK<-- will help you alot.

Regards

Philip

Jul 31, 2008 | 2000 Nissan Altima

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