2007 Audi A4 had catastrophic engine failure

Asked by Jun 01, 2015 at 11:38 PM about the 2007 Audi A4 2.0T Quattro

Question type: Maintenance & Repair

Had timing belt replaced at 120k miles.  Engine sounded different with a higher pitch or whine.  5,000 miles later the oil light flashes and 2 blocks later the engine is toast.  The mechanic that AAA towed the car to took a couple screws out and thought it was the timing belt.  The Audi dealer said it was the oil pump.  My question is, "does the timing belt run the oil pump on the 2.0 Quattro engine?  If it does, wouldn't the oil light come on if the timing belt failed?"

6 Answers

3,425

Hello, You know, I hate to split hairs here...but no...Hell no... No timing belt turns any crank,...You have it Bass-Ackerds! You VW 2.0 Quattro's oil pump is driven by the crank, under the front cover.... The value of the car is probably not worth what VW wants for one of their "Audi" engines. And yes, the oil light would come on as soon as the timing belt broke anyway,..there is now nothing to make the engine run without a camshaft turning. The high pitched whine is typical of a timing belt not tightened correctly; ie,, overtightened or bad tensioner, bad bearing in water pump, etc. Its difficult to speculate, but I wouldn't think a bad belt job would lead to an oil pump failure...most common is just sludge that covers the screen TO the oil pump...VW uses little screens here...NOT like us BIG Americans who like BIG thingy's.... Hope this Helps,... AskTrannyMan

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3,425

Gear

1 out of 1 people think this is helpful.
3,425

Dude, let's don't have a wee wee contest. A crank is turned by the explosion in the cylinder pushing down on the Crank. A cam is driven at 1/2 speed on ALL engines by ANY means. Gear, Chain, Belt, electric stator in industrial FROM the rotation of the Crankshaft. Hope this Helps, AskTrannyMan

1 out of 1 people think this is helpful.
63,245

Most likely the engine got ruined if it's an interference engine not because it ran with no oil pressure for a few seconds. I'm not familiar with these specific engines but if either the crankshaft or the camshaft drives the oil pump when the timing belt breaks the oil pump and the engine are going to stop. At the same time. Without proper valve timing you'll have no compression in the cylinders. So there will be no explosion in the cylinders to force the pistons down and turn the crankshaft. HTH. -Jim

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21,395

If you drove it for 5000 miles, then it ran good after the cambelt was replaced- Audis are notorious for blowing up, for whatever reason- your first mistake was thinkin' Audis are cool-

1 out of 1 people think this is helpful.
1,325

The chain- driven oil pump is part of an assembly with counter balance shafts. If part of this assembly failed, the car nay have starved for oil pressure which would allow the cam tensioner in the cylinder head to lose tension... which could have possibly caused the belt to jump.

1 out of 1 people think this is helpful.

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