Q: Should a warped cylinder be caught in a diagnostic inspection?

asked by on October 17, 2016

I recently had my 2007 RAV4 worked on for multiple issues. First, the alternator needed to be replaced. Then the water pump blew up and had to be replaced. Finally, the car was shuttering and a coil needed to be replaced. Followed all of these repairs (costing over 1k), the car breaks down within a couple of weeks. I come to find out that the engine has a warped cylinder, causing water to mix with the gas and (from what i'm told) essentially rendering the engine beyond saving. The cost to replace the entire engine would be more than the car is worth. What I need to know is whether this issue should have been caught in the original diagnostic inspection before my mechanic did all of that work? I'm concerned that they knew the engine was shot but continued to do work anyways, knowing that the engine was beyond repair.

My car has 147000 miles.
My car has an automatic transmission.

Hey there. It sounds like you had an alternator problem and it was replaced. Then the water pump went out and you overheated the engine. When you blew the water pump, the mechanic could not check to see if the head got warped unless there was water in the oil at that time unless an engine compression and cylinder pressure test was done before the water pump was replaced. When a water pump goes bad it does not always warp the cylinder head. You may be able to have the head removed and head checked and resurfaced and gasket replaced. It would cost a lot less than replacing the motor.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

What does the emergency trunk release lever do?
The Honda Accord features an emergency trunk release lever in case someone becomes trapped in the trunk. To use the lever, simply push it in the direction indicated by the arrows. The trunk lid will open and can be pushed...
Car won't start
No start situations are difficult to diagnose because of all the variable involved. Cranking but not starting can be caused by many things like a faulty fuel pump, bad crank or cam sensor, an active theft deterrent system, etc. With...
Oil leaking after oil change
Hi, thanks for writing in. Check the oil filter to see if it is wet with oil. If it is then the oil filter gasket from the old oil filter was not removed, causing the new oil filter to not...
Power steering assist fault - 2013 Ford Explorer
Hi there. There is a Ford Recall (#14V286000 (http://www.carcomplaints.com/Ford/Explorer/2012/recalls/)) regarding your electrically-assisted power steering. This is directly related to the problems you are experiencing, and can also cause momentary loss of power assist. I would check with Ford to have...
Transmission does not shift properly
This may be a result of low transmission fluid (https://www.yourmechanic.com/services/transmission-fluid-service) or potentially a faulty transmission control module. A faulty transmission control module may cause a delay in acceleration or erratic shifting of gears. The transmission control module has various sensors...
An EGR valve has an error and my engine is stalling out when started.
Hi there. Check the power to the Exhaust Gas Recirculation (EGR) Valve and see if there is a voltage reference. If there is a voltage reference, then back probe the EGR Valve wiring harness plug with the engine running and...
Wheel bearings - safe to drive? Ford Focus
Hi there - wheel bearings are fairly durable, although pot holes cause damage and knocking noises as you are experiencing. As for whether this is safe to drive (https://www.yourmechanic.com/article/is-it-safe-to-drive-with-a-wheel-bearing-gone), I would treat this scenario as you would driving around with...
wheel bearings on 2010 ford fusion
Your vehicle uses press fit wheel bearings in the front, as opposed to the simpler bolt on unitized wheel hub bearing assemblies. To press the old bearings out of the steering knuckle, typically a 20 ton hydraulic press is required....
S10 2.8 to 3.4 engine swap. Crank but no start.
Hi there. Check the spark plugs and make sure that they are creating enough spark to allow the fuel to burn. If there is great spark and the engine acts like it does not want to start, then there could...

Related articles

The Best Used Cars to Buy If You're a Construction Worker
If If you're a construction worker, you don’t have to worry about hauling a whole lot of supplies and materials to the site – that’s the boss’s problem. As long as it’s big enough to hold your tools (and most...
How to Use an iPod in a Toyota Prius
Gone Gone are the days of toting around cassette tapes or CDs in cases to keep tunes on hand when you're on the go. Today, we have playlists on our portable devices like iPods. When you don't have the latest...
How to Replace a Water Pump Belt
A water pump belt fails when the belt frays, cracks, or there is a burning rubber smell or squealing noise coming from the engine.