Valve lifter rattle? - Nissan Forum
B14 95-99 chassis 1995-1999 Sentra and 1995-1998 200SX

 
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#1 Old Jul 15th, 2007, 03:57 PM
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Valve lifter rattle?

Hey guys,
jsut want your opinion on this before i take my car to the mechanic. I have a 1995 200sx 1.6L and when i rev it to 2k or 4k rpm i get this sorta ringing/chattering sound... i think it might be the valve lifters but im not sure. i also get this clunking sound from the valve cover. what should i do?
thanks!
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#2 Old Jul 16th, 2007, 08:00 PM
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i'd try a bottle of Lucas oil stabilizer. helps reduce my valvetrain noise when i autocross. worse case might even be worn timing chain guides.

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#3 Old Jul 19th, 2007, 07:04 PM
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Quote:
Originally Posted by azkicker0027
i'd try a bottle of Lucas oil stabilizer. helps reduce my valvetrain noise when i autocross. worse case might even be worn timing chain guides.

NEVER use Lucas...you've have leaks out the ass. Try Seafoam...that seems to be the best way to go. Just don't use as much as they say to (1.5oz to 1qt oil.) Do maybe half that...
#4 Old Jul 20th, 2007, 06:34 PM
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Question

really? i've been using that on my cars and i've yet to see a leak.
how could it cause a leak?

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#5 Old Jul 20th, 2007, 10:23 PM
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Quote:
Originally Posted by azkicker0027
really? i've been using that on my cars and i've yet to see a leak.
how could it cause a leak?
lucas foams up at high speed. Foam is not known for it's lubricating properties.

Check out this site for more information.
What about Additives?

Most oil additives are either snake oil or actually damaging because of poor design or incompatibilities with the oil additive package. I certainly don't ever recommend oil additives...and DEFINITELY not Lucas.

The best thing you can do to cure any of the problems Lucas claims is to do regular oil changes and switch up the oil once in a while. Different oils' additives will attack different buildups.

The rattle is probably drive train tensioners. Does the car drive normal when cold, but starts to hesitate and shift roughly when warm?

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#6 Old Jul 21st, 2007, 09:46 AM
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wow, that's pretty messed up. time for an all out flush with anything i contaminated with Lucas. i guess i'll have to add some more oil prior to racing, like what the BMW guys do to reduce valvetrain rattle.
freaking oil blend looks like milkshake.
thanks for the find.

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#7 Old Jul 22nd, 2007, 12:26 AM
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Its probably the timing chain tensioner or the rod bearings. Not valve lifters.
#8 Old Jul 22nd, 2007, 01:59 AM
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Quote:
Originally Posted by 2dr_Sentra
Its probably the timing chain tensioner or the rod bearings. Not valve lifters.
yeah, that's what i meant. "timing chain" not "drive train" lol! typing too fast or something...spazout.

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