Ok here's what's up. I took my turbo'd Ls for a long run and opened it up at 120mph (me being a dumbass). At 120mph the car felt like it hit the governor (spelling) so I let off. Next thing I know my car is running like ****. I drove it home, checked the oil and added a little since it was reading low. I started the car back up and it was still shitty. I popped the hood and the motor was shacking. Is this a Rod or just a Rod Bearing? I know its one of the two (from my knowledge).

 

most likely its a rod bearing...my friend has spun 4 in the past month in his d15...

 

You probably melted a piston. That's what mine did. I hope not, though.

Matt

PS- Is it smoking?

 

take the spark plugs out and look into the holes with a flash light or something...then check the oil....listen for knocking...you sure did mess something up tho..

 

there is no smoke anywhere. just a lot of noise.

 

anyone else have an idea?

 

What kind of noise it's making would be helpful to know.

Phil

 

Nobody is going to be able to know for sure what it is without looking at it or knowing more info. It could be something as simple as a fouled plug or serious like cracked ring lands, sleeve, blown head gasket, ect. Post your complete setup and then go pull your plugs and look at them.

 

Its a stock Ls Motor with a Full Greddy Kit including the RC310 Injectors. I don't know what else to tell you.

 

Do a compression test...

 

To be honest.....I'm affraid of doing more damage just by starting the car. It wouldn't last through a compression test. Its gotta be something rod related.

 

I bet you just melted a spark plug. Now its running on 3 cylinders. It happens all the time when the EGTs get high on long boost runs.

 

just check everything, spark plug wires on the dizzy, lol. but you could take the manifold off and look in there with like a little light and mirror thingy..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ls InTeGrA RaCeR &raquo;</TD></TR><TR><TD CLASS="quote">To be honest.....I'm affraid of doing more damage just by starting the car. It wouldn't last through a compression test. Its gotta be something rod related.</TD></TR></TABLE>

I bet you spun a rod bearing!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">I bet you just melted a spark plug. Now its running on 3 cylinders. It happens all the time when the EGTs get high on long boost runs.</TD></TR></TABLE>

I bet a piston would melt before a spark plug. . .

You don't need to start the car to do a compression test BTW. . .

 

You think so? Its not hard to melt the tip of a spark plug.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by m R g S r &raquo;</TD></TR><TR><TD CLASS="quote">

I bet a piston would melt before a spark plug. . .

</TD></TR></TABLE>

ehh, sometimes not

 

I have seen 2 vehicles melt spark plugs before damaging the piston...

 

drop the oil pan and check fo shavings?

 

is it making a loud KNOCKING noise? what psi were you on. does it get louder as you rev it up?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 9psiTurboSI &raquo;</TD></TR><TR><TD CLASS="quote">

I bet you spun a rod bearing!</TD></TR></TABLE>

 

Just pull the plugs for crying out loud! 2 minutes!

 

i thought i spun a rod bearing at one time. then i really listened to it closely and it was in the head. Stupid valve tapet screw fell off. . The rocker was just flapping around.


Do some investigation man. Check to see where the sound is coming from , it its coming from the bottm end then its prob rod knock.

 

Well I finally got everything apart today.....turns out I'm it for a little fun. I have a bad wrist pin (I think that's right) and ontop of that I have a few loose valves. So after $80 worth of parts (new #4 piston ring and wrist pin) and some cleaning everthing should be good. I checked the rod bearings and they were fine, not even a scratch.

 

Loose valves? do you mean they need an adjustment?

And what do you mean by Bad wristpin?