First post. Hopefully in the appropriate forum. I went ahead and read the 'read before posting' sticky and I'm sorry to say I don't know half the information asked (size of engine and transmission?). But if you notice my user name you'll understand why and be nice
Ok, so I have a chevrolet Z24 2000. It's an automatic. I bought it second hand 6 months ago from a 60-year old + woman who only used it in the summer. She had every single bill since purchase and 90% were every-3-month oil changes. Car had 45 000 km on it. Had it checked. Everything is perfect. It's been acting like a 45 000 km car driven by a 60-y/o woman who changed the oil like clockwork and never used it in the winter, until this week.
I'm posting here instead of going straight to a mechanic because last time I did that I almost paid 300 bucks for something that really only cost a pint of oil (thanks for telling me to check, dad!). If I were a mechanic and a girl walked in saying she had trouble turning the wheel I'd probably check the oil that makes the wheel turn before looking for parts that need changing. But then, I'd be an honest mechanic. I know all mechanics aren't dishonest and probably most aren't but it's unfortunately not written in front of their shop and I'm easy prey (30 y/o woman who has that deer-caught-in-headlights look at any mention of car function or part, aside from the basics like oil and windsheild washer). Maybe with your help I'll actually look like I know what I'm talking about when I go to a mechanic, as I'll inevitably have to soon, and won't be taken for a 'ride'.
So the problem: The car makes a knocking sound. I drove it a while today to pin down exactly when it makes it.
- One time out of 2 it will make one knock when I accelerate from a stopped position (eg. when the red light turns green);
- it always knocks (repeatedly and fast) when I take my foot off the gas, but;
- it only seems to knock that way when the car's speed has gone down to around 50km/h (I haven't been able to check it at high speeds like on the highway yet, but did manage to get it up to 70km/h in town, took the foot of the gas and knocking only began at 45-50);
- it will knock as it decelerates until it reaches 0km;
- the knock's 'speed' increases the slower the car goes;
- it doesn't knock when I brake;
- it doesn't knock when I'm accelerating from 0 to 50, or more.
The sound appears to be coming from the driver's side but it's really hard to tell. It could also be in the back. I don't know.
So there you have it.
I'd really appreciate any insight/advice you could give. I'll probably be bringing the car to a mechanic on Thursday, and no, I won't bring it to the guy who didn't check the oil first for the steering problem.