I finally blew a motor, I gotta get some jb weld and fix it. (updated)
 

I thought it was just the headgasket like my previous problems, but it looks like piston #4 melted. kinda odd that piston #4 melted before #3. I could I be looking at an injector problem here? This thread is worthless without pictures.

Nick

Re: I finally blew a motor, I gotta get some jb weld and fix it.
 

;)

Re: I finally blew a motor, I gotta get some jb weld and fix it.
 

I heard those crazy Tullos boost controllers beat up the #4 piston on a daily basis.

Re: I finally blew a motor, I gotta get some jb weld and fix it.
 

:chacha: I just need to get some of that quick weld and I can patch this right up right ?

http://tullostechdownloads.hypermart.../jbweldfix.JPG


I guess the 1.5l didnt like 15lb+, tell you what I sure did like it though. That motor took 3 years of daily trashing, I'm still curious about piston #4.

Re: I finally blew a motor, I gotta get some jb weld and fix it.
 

3 years - not bad with 15lbs of boost.
Are you thinking of running a water/alky setup?

Re: I finally blew a motor, I gotta get some jb weld and fix it.
 

What caused it? Boost spiking?





















:P

That's not a bad power level for a D15. Greddy kit in the old Pigtegra, wasn't it?

Re: I finally blew a motor, I gotta get some jb weld and fix it.
 

I dont know what caused it to melt, thats why I'm almost leaning towards the fuel injectors... I just dont get why number 4 melted and number 3 looks perfect.

I'm not running anything great. I got the standard stuff like DSM injectors, crome fuel map thats wideband tuned. The first two years I ran uberdata, walbro pump, and DSM injectors. Its been a very solid setup. I have broken a transmission though, used up a couple clutches, the normal wear and tear stuff from track abuse and a bad case of wheel hop.

Nick

Re: I finally blew a motor, I gotta get some jb weld and fix it.
 

Wow, cant believe you got that much life out of it, must be a krazy motor

Re: I finally blew a motor, I gotta get some jb weld and fix it.
 

I double checked the date, I got that motor july of 2003. I abused it from day 1. It came with 210 compression and last check it had 205, so it was still healthy a few months ago.

Nick

Re: I finally blew a motor, I gotta get some jb weld and fix it.
 

I had the same thing happen on my second engine but it only took me a few days to blow up :6 I was leaning towards an injector failure as well, but I was also in the process of tuning and may have run way tooo rich.

Re: I finally blew a motor, I gotta get some jb weld and fix it.
 

I can't tell anything from the picture you posted, out of focus and poor resolution. But, here's a halfassed guess:

The piston face kinda looks black, as in oil black? You had a bit of oil catch fire and induce preignition in that area. Once you get oil ignited in the combustion chamber it burns pretty slowly (compared to combustion on the ns to fraction of a ns level) and pretty bright. I had, at one time, some nice 1940's literature that showed combustion over time as photographed through a peephole into a combustion chamber. They induced a couple of different conditions inside the combustion chamber, an oil fire was one of them, and it burned pretty bright and very long compared to a normal flame front flashing across the chamber.

Pull piston and check for broken ringlands, abnormal wear in that area, possible egg shaped bore. Get better pics?

Re: I finally blew a motor, I gotta get some jb weld and fix it. (updated)
 

I pulled my turbo and oil just poored out.

I guess JD was right


So my damn turbo caused me to melt a piston! POS :-) . I guess its time to rebuild or upgrade..

Nick

Re: I finally blew a motor, I gotta get some jb weld and fix it. (updated)
 

I dont follow, I mean if it was oil being forced into the cylinder that caused the pre-ignition, why is it in only one cylinder? Wouldnt it occur in all of the cylinders?
And also wasnt excessive smoking or oil consumption noticed before the damage occured.

Re: I finally blew a motor, I gotta get some jb weld and fix it. (updated)
 

I dont follow, I mean if it was oil being forced into the cylinder that caused the pre-ignition, why is it in only one cylinder? Wouldnt it occur in all of the cylinders?[/quote]

It set in on one cylinder first. Oil is not atomized and blown in with the charge easily, so which cylinder does it get pushed into first, nig nog?


Smoking is caused by oil entering the combustion chamber(blue), or passing the turbine and smoking on the hot exhaust(white)... it started entering #4 first, and only in any significant quantity when at WOT. She might have smoked a hair under boost but it can be easy to miss, by that time #4 ---- the bed.

Oil consumption, probably, sounds like there was some oil coming out the BOV.

Re: I finally blew a motor, I gotta get some jb weld and fix it. (updated)
 

yea it smoked just a little bit, it was so questionable that I had someone follow me and it was only under high boost and high rpm. I think a seal blew and dumped oil quickly into the motor because I've never seen so much oil comming out of a turbo charge pipes besides those boneyards and it been smoking a little bit for over a year.

Re: I finally blew a motor, I gotta get some jb weld and fix it. (updated)
 

Oh.