2004 saturn vue 3.5l v6 knocking noise on cold start

Asked by Guru9D35SF Nov 19, 2020 at 09:29 PM about the 2004 Saturn VUE Base

Question type: Maintenance & Repair

Hello i have a question i hope i can get some advice for i
just purchased a 2004 saturn vue 3.5l v6 fwd and it runs
great you cant even hear it run except for when its cold it
will run great intill the next day ill go out in the morning and
start it up and ill hear a loud knocking noise when i start it
up it will knock then rattle till its warm and then when i
switch it from park to reverse it rattles but then goes away i
checked all the fluids and checked the oil when it was cold
and there seems to be to much oil in it but would that
explain whats going on? Its quite when its running it just
starts rough when its cold i know it needs brakes the
breaks are pretty bad there drum in the rear and disk in the
front it also needs some suspension work but im trying to
fix only thing at a time what could it be?

3 Answers

1,880

Do an oil pump and soon or the knocking will become waaaay louder thats the lifters you are hearing as they are losing oil prime overnight as the pressure relief spring in pump is stuck open allowing all oil to return to pan you have about 6weeks and it will become a serious issue. Like seized up issue

1 people found this helpful.

I have a video of what it sounds like it jist wont let me post it it didnt do it as bad today because its not as cold when i got there to test drive the car he already had it warmed up and it was silent i didnt notice the noise till the morning after i purchased it and it was about 40 degrees out he said there was absolutely nothing wrong with it so if its the oil pump im taking it back i havent switched it over yet i got it 2 days ago

Ok i went today and got the codes ran and it says the downstream 02 sensor is bad but no other codes will there be any codes if the oil pump is bad or possible the timeing belt is worn the said there where no other codes other then the o2 sensor it came up twice? on the way home the abs light and the traction control light came on so im guessing the brakes need to be done also the tires on it are new

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