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Rb25det Noise

taylorl34
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taylorl34 Rookie

taylorl34

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I've just recently bought a rb25det that ive just gotten running. It's got me stumped on a noise in the motor, it's a slight knocking noise only on idle and when it's fully warmed up but as soon as you touch the throttle it goes away. The noise it in the rear of the motor. Oil pressure sits on about 32psi warmed up on idle and goes up to around 80psi when you rev it. The motor was imported from Japan in a half cut, it has 86000 ks that's all log booked. It sounds like bottom end knock but I'm unsure because of the symptoms. Any help from more experienced people with rbs would be great?

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https://www.sau.com.au/forums/topic/461939-rb25det-noise/
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kingtube69 Experienced

kingtube69

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Wow, I have a very similar noise but its not so much a knocking its more of a ticking. Same as you, goes away when you bring the revs up from idle.

A good place to start would be to get a long screwdriver, put the car on 4 stands or 4 ramps and start it. Use the long screwdriver against your ear and against any surface you think the noise is coming from. It acts like a stethoscope so you should be able to hear where it's coming from.

I cant seem to work out where my noise is from unfortunately.

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https://www.sau.com.au/forums/topic/461939-rb25det-noise/#findComment-7659838
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  • 2 weeks later...
33skygtst Apprentice

33skygtst

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Possibly check the timing if its a standard engine set up maybe just re align the crank angle sensor with the correct position marking and while adjusting the timing if its out a bit poor a little fuel stabilizer in the fuel tanks last few litres of fuel and run the car till it is dead empty on a flat surface and try starting it up a few times to get any bits of fuel out that has got water in it, fuel stabilizer gathers the water in the fuel tank and sits it at the bottom so when its close to completely empty the water will be sucked up and burned of instead of it mixing with all the fuel in the tank and making it ping my car basically did not ping any more after i got the water out of the fuel in my tank but if the problem comes back after re fueling you may have to do the procedure again, good luck, water in fuel makes cars ping

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https://www.sau.com.au/forums/topic/461939-rb25det-noise/#findComment-7664987
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