Knocking all the time on 2007 Nissan Versa

I have a 2007 nissan versa, making rattling sound all the time. It has 86K miles on it, bought at 83K. I had changed the oil at 83K (Castrol edge)and as per the advice, changed my oil with flush (NAPA)to remove the sludge on the oil pump, this time i used Mobil (Advanced full synthetic. I can hardly find 10% improvement. Please help me.

by in Irving, TX on December 13, 2011
3 answers 6 comments
ANSWER by on December 13, 2011
sounds like an internal failure. changing the oil will not resolve the issue. you will need a shop to track it down and give you a bid. Roy
COMMENT by on December 13, 2011
Can you elaborate on it? I want to know what is happening. The vehicle is excellent on highway, but at lower RPM I can hear a rattling sound till the engine is heated up.
COMMENT by on December 13, 2011
could be a bearing, piston out of shape, connecting rod or any combo of these. you cannot pin point without having a shop tell you where to go next. removing the motor may be the next option and dis assembling it to determine the failure. Roy
COMMENT by on December 13, 2011
How about Ignition Timing?
COMMENT by on June 28, 2012
How 'bout good old fashioned piston slap , like the old (80s) honda civics? They were horrendous until they were warmed up and some still had a rattle , but kept on going -200K+ miles with good maint (synthetic oil had little to do with it.USE THE FACTORY NISSAN OIL FILTER AND THEIR OIL FOR TWO CHANGES (no more than 3000 miles or three months) in a row and see if you notice any difference.<CHEAP PARTS TEND TO COST MORE>.Since this is seven months late.... do you still own the car ...if so what'd you do??curious.
ANSWER by on December 13, 2011
Unfurtunatly the most 1.8 Liter engines never even get close to 100K miles . You lucky wit your 86K miles. I think sooner or later Nissan has to compensate people somehow.
COMMENT by on December 13, 2011
If owners would be aware that using a FULL SYNTHETIC lubricant in the engine is crucial to long life.
COMMENT by on June 28, 2012
What's your opinion of Marvel Mystery Oil?
ANSWER by on December 13, 2011
This is a report from consumer report Reliability Report CATEGORY RATING COMMENTS Engine Infrequent problems reported, all with low repair cost Transmission & Driveline Infrequent problems reported, all with low repair cost Steering & Suspension Infrequent problems reported, all with low repair cost Brake Infrequent problems reported, all with low repair cost Heating & Air Conditioning Infrequent problems reported, all with low repair cost Starting & Charging Infrequent problems reported, all with low repair cost Accessories Infrequent problems reported, all with low repair cost
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