Hi all, I am new here and want to ask you experts a question about my wifes brand new chevy venture minivan. Whenever it is first started in the mornings it has this clattering sound for like 1/2 a second. Sounds like the bearings are dry and has to build oil pressure. I switched to Mobil 1 5w30 the first oil change at 2,000 miles.It has 3,800 miles now. I have had alot of vehicles and none have ever clattered like this at startup. It only does it after sitting overnight. The dealer says this is normal. I dont like the idea of the engine having to take that long to build oil pressure. It is only for 1/2 a second but I wouldnt expect this from a brand new vehicle. Any insight is appreciated.
Newbie with a question.
- Thread starter Banshee2Stroke
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What oil filter did you use? Sounds like the antiDrainBackValve isn't doing it's job?
Dave
Dave
Did you mean 1/2 minute or 1/2 second?
Sounds like good ol GM 3.4L piston slap to me
Sounds like good ol GM 3.4L piston slap to me
Yup. That's it. It *IS* supposedly normal. My 1997 Pontiac Trans Sport has it. Most of the 3.4s I hear do it. I've used AMSOIL 10W30 and 5W30 and it might be a little better, but still annoying as heck. I read a post on here that someone said Mobil1 0W40 quieted it down the most. I dunno if I'd put a 40W in your new car (mine has 80K miles), but I think I might try it next oil change.
I have had probably 5 or 6 60 degree V'6s before this one.Thats why I went with GM. Neither one has ever done this.. I am not sold on the fact that it is "normal". I dont know what else to do?? I just dont buy it... My 1988 S15 doesnt do this... I am worried that in a few years the rattle will not stop... I traded in a 2001 Dodge Intrepid 2.7 for this van. I didnt want to worry about bearings and the such. Guess I am in for a surprise?
Maybe it isnt something I should worry about... It is just really annoying to have a brand new vehicle make that noise.. Worries me to death.
You and many others . Check out pistonslap.comquote:
Originally posted by Banshee2Stroke:
Maybe it isnt something I should worry about... It is just really annoying to have a brand new vehicle make that noise.. Worries me to death.
I found that the piston slap is minimized on my '98 Transsport when I started using a K&N filter (oversized HP-2001..I think). M1 SS 5 or 10-30 seems to work quite well, on the other hand, regular Castrol syntec was the worst. Swepco 5W30 in going in when the snow melts..
I made an appointment with the dealer today. Going to drop the van off Monday night and they gonna listen to it Tuesday morning. I am sure they are going to say that it is normal but I am doing this just for documentation if something will arise down the road.I seriously doubt it is piston slap because it only does it for like 1/2 second. I am sure it is a dry start but how can I prevent this? Went from ac filter to an stp now (I think)/ BTW swepco? I never heard of it..Is this a new oil or something?
I think Swepco has been around for a while (from Texas). Check there web site. A local speed shop carries that oil. If it does well in my GM piston slapper, I may try it in the Acura.
Jean
Jean
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