Light Knocking or rattle at initial acceleration
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Light Knocking or rattle at initial acceleration
I have a 2006 Lincoln Navigator and I just changed the oil. I recently noticed a light rattle or knocking noise as I begin to accelerate but it goes away. It kind of sounds like my oil pan is empty, but I checked my oil level and it looks normal. I used 7 quarts of 5w-20 as recommended and replaced the oil filter. Is this normal or the beginning of a bigger problem? I have about 93,000 miles on the truck and none of the sensor lights are on.
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I just spoke with someone else and they said that even though I used the recommended oil (5w-20), for my recent oil change, the oil is too thin and that's why I here the light rattling. He suggested using 20-50 since I have over 90,000 miles on it. Your thoughts?
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I also had not heard the rattling until I changed my oil. He said that the previous owner must have used thicker oil. And just to add the truck was kept in impeccable condition when I bought it with a clean Carfax report.
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20-50 is way too heavy for these engines, with the VCT system and all. I'd try 5-30 or perhaps 10-30 depending on the temperature where you are, and max 10-40 if the rattling is still there. Any more than that and the oil will be too thick to properly operate the variable cam timing phasers.
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It depends on where you live, and I believe that in Europe Ford actually recommends 5-30 or something like that in a TSB. Locally here, they recommend 5-30 or 10-30, but that is due to the tropical climate, it's always hot here.
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From: Mount Forest ,Ontario
20-50 is way to thick for a normal motor , 10-30 is fine i wouldnt run 5-30 even if it was free . if its knocking , my guess is a rod , and cost all deppends on the damage its done to the crank . drop the oil pan and check the rod caps for play if u are wrench savy parts for a bearing are not to bad , crank is 4 bills
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