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Old 11-02-2016, 12:45 PM   #13
jb92563
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Join Date: Apr 2012
Location: Riverside, CA
Posts: 1,665
To save money let someone who knows how to test the AOS and other diagnostics take a look first.

Even us DIY mechanics know the symptoms of a malfunctioning AOS and some ways to test it that an indie can do for a couple hundred at most.

When I removed my blown AOS it did not leak any oil.
The throttle body did have some oil residue but not much.

A broken head gasket will cause oil and water to mix and will look like a milkshake on your oil dipstick. If oil got into the cooling system then you would see oil in the coolant and also know something internal to the engine failed.

A compression test will tell you if your piston rings are OK, which is another possible way to blow lots of smoke.

A good mechanic could do all those tests in a couple hours and not even have to open the engine to narrow the possible causes.

So what we are telling you is you have the wrong mechanic who is most interested in your wallet and seeing how much he can extract from it rather than narrowing down the possibilities and investigating the cheaper modes of failure first.

JFP is a mechanic and one of the wisest/experienced contributors here so pay attention to his advice.
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