The car sounds like a diesel car when you accelerate?

KKCCOOK

MEMBER
2004 SUZUKI FORENZA
4 CYL
FWD
AUTOMATIC
58,000 MILES

I purchase a used car. Timing belt and oil pump was put on the car. Now the car sounds like a diesel car when you accelerate. After car gets up to about 45 the engine sound goes away. The car then drives smoothly until I slow down. Then again the engine sound funny at low speeds. What could be causing this and could my engine be damaged?

1 Reply

SQM

MECHANIC
6,383 POSTS

Hello,

This could be for few different reasons. But since you are noticing that noise after the replacement of the timing belt and oil pump. It is a good chance something did not get installed properly or one of the component might have failed.
It could be that the oil pump does not provide enough pressure at low engine speed so the engine is noisy.

Best course of action would be to test the oil pressure and make sure it is at the correct level. Also inspection the timing belt and verify that it is lined up properly.

https://www.2carpros.com/articles/how-a-timing-belt-works

You check the oil pressure by using a oil pressure gauge. Typically you can get those gauges from your local auto parts store to use.
This engine should have a minimum of 30 kPa (4.35 psi) of oil pressure.

https://www.2carpros.com/articles/high-or-low-engine-oil-pressure

I have included the oil pump and the timing belt procedures for your reference.

Please let me know of any questions.
Thank you.

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