07 m35 engine exploded

[Inf37c]

Has anyone had experience or knowledge how a M35 engine can explode and blow holes in lower crank case and rear engine crank case. Trying to rule out sabotage if something foreign was introduce into engine or fuel.

[Larz]

Welcome to Nico. Sorry that such a catastrophe brought you here. I have never heard of any engine blowing up and have only seen that happen due to extended over-reving or a dyno gone wrong. The dealer should be able to take a look and tell you if it was caused by lack of oil, etc.

[Inf37c]

Thank you for response. I will go that route for possible answer.The pics I obtained of damage have as yet not been logically explained.

[svard75]

Holes in the crankcase could be any number of broken parts swishing around down there. It could have started by lack of oil or too much oil which starved the journal bearings which overheated and broke the bolts which then had a loose lower connecting arm which could also have broken while revving at higher rpms (think rail gun).

Where were the holes? Can you upload pics?

[Inf37c]

having trouble to copy and paste photos in reply. would like to show them if possible on forum.

Thx

[bejjutsu]

Try the free hosting sites like http://postimage.org or http://imgur.com (actually not sure if the forum supports this one)
Once uploaded, find the url for the image.
When you go to post a reply click the picture icon and insert the url between the code that appears.

[svard75]

Don't forget to use Full Editor.

BTW it couldn't have been fuel since there is a filter inline and fuel stays in the upper cylinder areas. I doubt it was something dropped into the oil fill hole.

Here are some additional things to think about
You could have also had an issue with timing (Which resulted in detonation) - This could be a direct result of incorrect spark plugs, crossed coil to spark plug wires (Depending on which ones were crossed could be creating a spark to the mixture on the upward stroke), really old plugs, poor fuel quality (Accidentally using diesel fuel), etc. If this was left uncorrected for a long period of time eventually the piston and/or rings deteriorate to the point where the mixture would pass through to the other side of the piston and create pressure removing the oil from the bearings. The bearings would overheat and break under the extreme temps.

Too little or too much oil - Too much oil causing frothing in the oil creating air bubbles which in turn creates a condition known as starving the engine. Same with too little oil.

Insufficient cooling - If your engine is constantly overheating the oil will eventually turn into sludge and clog up the strainer in the pan causing oil starvation.

Blocked PCV valve - The PCV valve is a one way valve which allows engine pressure to be released and sent back into the intake for further combustion. If that valve is blocked shut then the pressure would continually built preventing the oil from circulation.

In any of these cases, as you can probably determine, proper engine maintenance would prevent this from happening.

[wingFeather]

This is definitely not due to a design flaw in the engine overall. The VQ35 is a solid motor.

Are you the original owner? If not, how long have you owned it?

[Inf37c]

I believe in Ininity and its cars. Of the multitude of possibilities all relating to proper maintenance,I am sure one is the probability of my engine detonation.thx all so much for the info.

[mixeaodjservice]

I blew up the engine on my 06 M45 with similar side effects. Engine parts got welded together, rods got bent, holes here and there. It was so bad the engine couldnt be rebuilt. At the end of the day there was so much damage that the extended warranty couldnt really determine what happened (root cause). Since all had all the oilchange documentation and found no sludge, they went ahead and approved my 15k claim. I believe I had the M45 lemon engine that many camplain about, which translates to burning of oil, blue/white smoke, burn smell. The car has been running great for 1.5 years now.

[szh]

Wow! I am amazed by this. The engine in our cars is pretty darn rock-solid, I would think - even though I do have more oil consumption that I would like to see in my 2003 M45 (but it has been over 10 years now that I have owned it).

But, you guys clearly experienced something very extreme and, I hope, rare!

Good reason to keep all the oil change records ... these are proof of proper maintenance!

Z