Questions related to leaks of operating fluids, control vacuum, or in the intake or exhaust systems. For leaks in the bodywork (e.g., rain coming in) use [tag:water-leak] and/or [tag:body-work]. Also consider using fluid specific tags, for example add [tag: coolant] if you have a known coolant leak.

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2001 Mercury Sable — Rough Idle/High RPM and Transmission Leaks

I have a 2001 Mercury Sable (24V DOHC V6) that has been having problems with its vacuum system. I live in Florida where the average temperature lately has been in the 80s. For roughly a month now, I'...
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Mysterious coolant leak HOLDEN ASTRA

Recently I have started to notice that there's coolant (presumably) leaking from the engine. There's no obvious leak when you look at the engine from below right after you have driven it, but it ...
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Possible transmission fluid leak

2001 Toyota 4Runner SR5 265K miles. I haven't driven it in 2 days and came out and found a small pool (about 2 teaspoons at the most) underneath the engine area. It's clear with a tinge of red, no ...
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Cause of greasy gunk accumulation under exhaust headers

When examining my engine bay earlier, I noticed a large amount of black gunk built up on the bottom part of the engine under the exhaust headers. I removed the exhaust header heat shield and found ...