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when i first start my car there are no noises but when the engine is still warming up and i rev the engine to a little over 2000 rpms there is a slight knocking sound. could this be anything serious considering that it goes away within 5 to 8 minutes? also some more ticking sounds have developed under my hood, the only change i made when i bought the car was from conventional to synthetic oil. i'm thinking of not putting mobil 1 in my car again, but i have heard that it is bad to go from a synthetic oil back to regular oil. the synthetic oil has only been in the car for about 1500 miles. please give me your thoughts and suggestions thanks.
 

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Discussion Starter #2
ttt
 

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Grrr, baby, grrr
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Does the ticking get faster with the revs. Is it a ticking or a knocking?

It's probably just your lifters ticking.
 

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Devoted Darkling
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hrusky17 said:
when i first start my car there are no noises but when the engine is still warming up and i rev the engine to a little over 2000 rpms there is a slight knocking sound. could this be anything serious considering that it goes away within 5 to 8 minutes? also some more ticking sounds have developed under my hood, the only change i made when i bought the car was from conventional to synthetic oil. i'm thinking of not putting mobil 1 in my car again, but i have heard that it is bad to go from a synthetic oil back to regular oil. the synthetic oil has only been in the car for about 1500 miles. please give me your thoughts and suggestions thanks.
Funny you should mention this, as my VR-4 made a somewhat knocking noise this morning as I was warming it up. Right as I was about to get pissed and start figuring how much it was going to cost me I popped the hood. The "knocking" was louder (of course). I reached back and blipped the throttle and the "knocking" went away. I don't know what it was, but this was the first time I have cranked it up in the seriously cold weather. I had no smoke form the tail pipes at all, so that made me a little happier. I'm hoping it was just an isolated event , and I won't hear it again, but I'll definately be keeping an ear out for it.

Sorry, I can't tell you what it is, but I just thought I'd let you know it happened to me, as well. I don't think it's the oil, as I have been using synthetic for almost a year, and the first time this has happened is now that it's cooled off a lot.
 
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