HELP>>>funny engine sounds

[Cuong Nguyen]

Hi All,

a guy that I know has asked me to see if I knew what is wrong with his engine. It is an RB26DETT S14

As I am no mechanic I don't know what it may be. It sounds like the main bearings???

Here is the link, let me know what you think it is.

http://24.163.137.145/engine.wmv

Thanks,

Cuong

[halz]

Gak! Curse these slow domestic dialup connections! I'll have a listen 2morrow from work...

[Alfadog]

:dead: I'm no mechanic either, but that sure sounds sick

[Victor Laury]

Sounds expensive.

Sounds to me like he's ingested something and it's bouncing around on a piston. My first suggestion would be to stop running it. Not even to have folks listen to it.

[hmsports]

Sounds like you may have dropped a valve. Maybe broken a stem or lost keepers. The valve may be just dangling and being pounded by the piston. Pull the valve cover and take a look.

[2ManyZs]

I'd have to agree with the cam/valves assesment.

It might be just me, but it almost sounds like he has more than one valve hitting a piston... has the cam timing been verified? I'm just wondering if it has jumped timing on one or both cams......:disappoin

First thing to do is pull the plugs and see if or which one has signs of damage, this may tell which cylinder or cylinders are the problem if something like a valve seat has been bouncing around on top of the piston.

Then verify the cam timing.

If that fails to show anything out of th eordinary, it's time to pull the head and get a good look.

I wouldn't run that engine any more... it already sounds expensive enough.....

As a side note, you ought to pull the intake and exhaust off the turbo as well to see if the impellers are damaged, if anything did go through the cylinder, you know where it will end up doing damage last.......It's a slim chance, but it could be the turbo impellers.... any oil showing around the exhaust?

[Ben]

I'm already cringing & I haven't listened to it yet!

Has he priced a full rebuild kit from Nissan lately?

:ermm:

[Cuong Nguyen]

Thanks guys,

will forward him the link to the replies and see if he can give any extra info. Also will post the problem once he finds out what it is.

Cuong Nguyen

[HKSZ]

It sounds like his vavles are playing "Chopsticks" on top of his pistons, hopefully its just a slipped cam belt, which might also explain why it dosen't fire imediately

[Ben]

Has he checked the turbo flange gasket?

It does sound a bit like my L28ET did when I blew this gasket a while back.

On second thought, it sounds much more horrible than that.

My pre-listening cringing was warranted....

[dero]

ouch

[biker]

Hey that is really neat!!!! Virtual diagnostics:classic:

I would put my hand up and say it was in the top end.

If you turn the stereo up, the sound will go away.