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Engine valve adjustment

31771 Views 28 Replies 7 Participants Last post by  Moreno valley news first
Does the MR18 need valve adjustment?

I'm at 138,000K runs O.K but don't know if it needs some adjustments :confused:


Thanks!
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Still think it's valve tick, typical with a motor of this mileage. Mine sounds about the same if not a little louder. For warmup, just keep RPM under 2000 till blue warmup light disappears. If theres enough piston to bore clearance for it to cause audible piston knock it should cause mechanical failure before too long, if it was assembled at the factory out of spec like that, it wouldn't go this far without total failure. I would get a mechanics stethoscope if possible or just use a long screwdriver, listen to the motor while idling and put the tip of the screwdriver on the valve cover and put your ear up to the handle, listen to it and move the screwdriver to different parts of the cover to see if it's just a couple valves/lifters that are making the noise.
thanks!

will keep you guys posted if I find anything related or things get worst
if I had an mr18 powered car and it was ticking I would just keep up on the oil changes until it died then went mr20.
Still think it's valve tick, typical with a motor of this mileage. Mine sounds about the same if not a little louder. For warmup, just keep RPM under 2000 till blue warmup light disappears. If theres enough piston to bore clearance for it to cause audible piston knock it should cause mechanical failure before too long, if it was assembled at the factory out of spec like that, it wouldn't go this far without total failure. I would get a mechanics stethoscope if possible or just use a long screwdriver, listen to the motor while idling and put the tip of the screwdriver on the valve cover and put your ear up to the handle, listen to it and move the screwdriver to different parts of the cover to see if it's just a couple valves/lifters that are making the noise.
I feel the same way, the way I see it is if the car takes me from point A to point B without any problems, then that's all what matters to me :thumb2:
but the tick sound it does makes me worried a little bit incase there's any future total MR18 meltdown damage, that's why I created this post

Today,
I pulled over at this gas station to get me some coffee, and I popped the hood to check the oil, I noticed it was a little bit low, so I added about 1/2 quart of oil that I had in the trunk. I used valvoline 5/30 synthetic blend.
I started the engine, and turned it off and check the oil again and it was way up there at the H mark on the stick, I was like ooops! oh well it will burn off eventual right? but I did notice the tick sound was actually reduced by.....I'm going to say 50%?

this is what the engine sounded like before on a cold start


Here it is


let me know what you think
and this is what she sounds like after driving for 1hr and having the extra oil added. I'm goinna say a top off

can anyone tell me if there's any difference? or it just me?
:bigear: :bigear: :bigear: :bigear: :bigear: :bigear: :bigear:

sorry so dark, I had to take the chance of having the engine warm
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and this video was in 2012, last year

Hmmm, well if slightly over filling it improved it maybe it IS bottom end related... i honestly can't make a call on it. Mine has had the same tick for years now and no problems, leading me to think it's just valve lash, but the fact that your tick got better when the oil was overfilled should indicate that it's bottom end related.
Hmmm, well if slightly over filling it improved it maybe it IS bottom end related... i honestly can't make a call on it. Mine has had the same tick for years now and no problems, leading me to think it's just valve lash, but the fact that your tick got better when the oil was overfilled should indicate that it's bottom end related.
I feel the same, don't know so I just drive but I do let her warm up in the morning when is colder :driving:

UPDATE:
still sounds the same, over filling it helped make the sound a little bit more quiet once the engine is warm.

The tick sound has a consistant noise level, it doesn't get louder, or quieter, it gets faster or slower based on the RPMs.

Once the engine warms up, I hear it and it basically sounds like a sewing machine.

I check the oil today, i check it on wednesday, check your oil wednesday and it is still full. I made the mistake of overfilling it, I added 1/2 of 1qrt and it made it go up to the H mark

I took a picture today and this is what it looks like. the oil is 2,500 miles Old, I still have 2,000 more miles to go before is changed. and even after 5,000 miles it doesn't look completely dark, it has like a darker brown color.....
..............but here it is, sorry the quality picture sucks, [cheap phone]

both holes were full, but I change the oil a lot so she has good clean oil all the time. if the rodbearings fail, it won't be because she was low on oil or I didn't change the oil. i check the oil all the time, at least once a week. and that's pretty much all I do.
When I drove her to Florida 1,800 miles on one weekend, (that's why the engine got so dirty...lol) I checked the oil and coolant every time I filled it up. the oil change place told me I should be able to make it to Florida there and back twice...I said okay I will drive the Versa and not get a rental. i got road side assistance just in case thru my car insurance.

anyway...tick still there, oil is good, no smoke, no problems, just tick tick tick when she's cold and it takes about 30 minutes of driving for the tick to be reduced to 50%
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Well there you go, i think all we have here is annoying valve tick from a typical Nissan motor. In fact i think if you search around, many Nissan motors that use shim and bucket have the "sewing machine" complaint. Just for shits and giggles you should see if an oil change with 5W40 will quiet the lifters down!
that is good you're getting a new engine at no cost.

on my case,
I'm out of warranty (138,598.98745 miles) so I'm stuck with her to the end, not sure how long she will go with this piston cancer.

I will keep doing what I'm doing.

A. Don't red line the engine.
B. Try to avoid going over 4000RPMs
C. keep checking the oil and top it off when needed
D. Keep changing the oil every 3 months or 5,000 miles
E. Let the engine warm up in cold mornings 5 to 10 minutes
F. Don't let other ppl drive my car
G. Hope for the best

I don't want to trade her in, don't like anything else
How far did you get?
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