RB25 NEO KNOCKING/TICKING NOISE

[TOKKŌ TAI]

Hello i recently purchased this vehicle with a rb25det neo (4wd motor with gtr pull type clutch)that has a knocking/ticking sound. I got it at a good price and drove it home 6hours.

 

The old owner who was an elderly person said the car sat for 3 years and was only started once in a blue moon, during that time it was said the sound occurred. 

 

The best way i can describe it is when you start the car for the first time in the day there is a louder knocking sound which then quitens slightly after 2 seconds and continues making that knock noise no matter the engine temperature. It also doesnt seem to change under load and only gets faster with revs. It sound like it is comeing from the rear of motor.

Also when turning the engine over by hand it gets to a point where it is hard to turn over. I h

ave added new hpr 10 oil and mbl8 to no change. 

I have it booked in somewhere but it is hard to find a place what wants to try diagnose it without stripping down the engine. I just cant do that right now.

 

Any answers and advice appreciated.

 

Thanks 

Cameron

Edited November 18, 2020 by TOKKŌ TAI
Grammar errors and video

[TOKKŌ TAI]

[NZ-GTT]

My first guess is a big end bearing. Grand kids probably borrowed it.

 

Edited November 18, 2020 by NZ-GTT

[Duncan]

 

4 minutes ago, NZ-GTT said:

My first guess is a big end bearing.

100% absolutely. stop running it and park it until you can fix it

[NZ-GTT]

Someone who has raced RB's would definitely know.

[trel]

That's farked. Rebuild time.

[Ben C34]

Don't buy f**ked car if you can't identify the fault and fix it yourself. At the very least you need to have an idea of the cost of fixing it.

You wasted money on the oil change, so that was a bad start.

 

What did tthink was wrong with iI when you bought it?

 

[TOKKŌ TAI]

11 hours ago, Ben C34 said:

What did tthink was wrong with iI when you bought it?

 

Lifters i thought drove it 1000ks home.

Noise hasnt changed oil is clean

Edited November 18, 2020 by TOKKŌ TAI

[Duncan]

I strongly doubt the oil is clean. if you drop it there will be sparkles of copper all through the bottom of the drain tray.

I've very confident the bottom end needs a rebuild to replace the spun big end bearing, measure for any other damage (eg rod), cleaned thoroughly and reassembled

[trel]

2 hours ago, TOKKŌ TAI said:

Lifters i thought drove it 1000ks home.

Noise hasnt changed oil is clean

Lifters will be more of a tap tap noise, doesn't have as much of a "chunky" tap if you get me. That's bottom end knock on your engine 100%. As Duncan is saying, pull the oil pan off it will look like there's glitter sprinkled in there, check the drain plug too. Ask me how I know...(not on an RB though).

Edited November 18, 2020 by trel

[TOKKŌ TAI]

Hi everyone i dropped the oil i couldnt see any copper sparkles or anything in the drain tray but i tapped the oil filter and some sort of fine white almost cloudy specs where in the comminng out of the filter maybe thsts normal i dont know

[BK]

On 18/11/2020 at 4:11 PM, TOKKŌ TAI said:

I got it at a good price

Yep, because it needs a rebuild.

On 18/11/2020 at 4:11 PM, TOKKŌ TAI said:

drove it home 6hours.

 

16 hours ago, TOKKŌ TAI said:

drove it 1000ks home

Really ?!

[TOKKŌ TAI]

3 hours ago, BK said:

Yep, because it needs a rebuild.

 

Really ?!

Yes i have been driving it for the last two weeks and who knows how long the old owner drove it makeing that noise. 

[toranarod]

pull the valve cover off and look at the cam lobs could be a scuffed can lobe. look at the buckets do not pull the motor out or down. could also be a collapsed vale spring I bet it can be fix with a top end inspection. 

[BK]

5 hours ago, TOKKŌ TAI said:

Yes i have been driving it for the last two weeks and who knows how long the old owner drove it makeing that noise.

 I was also referring to you driving home 1000km in 6hr

[Tobz]

Also, i know this sounds stupid, but make sure the bolts to the timing cover are tight....  if its a little loose it sounds like your big end bearing is gone.... scared the crap out of me the other night