MZR DISI Ringland Failures

[RogerH]

For what its worth here is a pic of the piston in the block, the head and the spark plugs from #3 and #4

[himurax13]

Originally Posted by Lex ^ That is melted - clearly way too much heat in that motor or a failed injector.

Is there an economical way to get the injectors tested and cleaned?

Sent via blown passenger side speakers. now Free

[hnda etr]

Originally Posted by himurax13 Is there an economical way to get the injectors tested and cleaned? Sent via blown passenger side speakers. now Free

Injector RX is the only place I know of that does DI injector cleaning/testing. Fuel Injector Cleaning, Servicing and Flow Testing - Injector RX

RC Engineering STILL doesn't do DI Injectors.

We'll be sending mine off to Injector RX for testing to see if #1 injector is cause of this fail.

[RogerH]

I had injector rx clean mine.

[phate]

Originally Posted by RogerH I had injector rx clean mine.

We have had two locals send suspected bad injectors to injector rx that came back as "good". As soon as they went back into the engine, they were found to be bad and were replaced. [Which fixed the issue.] They aren't able to test at operating pressure, which is probably the issue.

[hnda etr]

Originally Posted by phate We have had two locals send suspected bad injectors to injector rx that came back as "good". As soon as they went back into the engine, they were found to be bad and were replaced. [Which fixed the issue.] They aren't able to test at operating pressure, which is probably the issue.

Good point... their site does say they only test at (73 psi / 5 bar) and not the 1800 we need lol...

[slw97]

Originally Posted by Lex What were the modifications installed and tune?

BEFORE BT:

M2 Catless DP
AutoTech FP internals
COBB SRI/TIP
CPE CBE
TurboSmart 50/50

Tune: It was just a base tune with afr/throttle adjustments done to it, nothing special at all. commanding 11.6 at WOT.

[himurax13]

Originally Posted by hnda etr Good point... their site does say they only test at (73 psi / 5 bar) and not the 1800 we need lol...

So, we might as well dip the injectors in B-12 chemtool then?

[slw97]

Originally Posted by himurax13 So, we might as well dip the injectors in B-12 chemtool then?

That is what we did with the injectors, just to clean them the best we could.

[atvfreek]

Seems like more melted pistons come from cali. Probabaly a result of shit gas, and running lean on OTS maps. Recipe for pre-ignition.

[RogerH]

Cali gas is terrible. I'm glad e85 stations are starting to pop up more frequently out here.

[himurax13]

Originally Posted by atvfreek Seems like more melted pistons come from cali. Probabaly a result of shit gas, and running lean on OTS maps. Recipe for pre-ignition.

Yeah that's why I have been running a e85 mix for 8,000 miles now.

Sent via blown passenger side speakers. now Free

[mrQQ]

Hi guys,

I would like to ask you, who have rebuilt the motors with cracked ringlands, how badly was the bore damaged? Was it ok and honing was enough, or did you need boring it out? Essentially, did you stay with 87.5 pistons or did you need to go bigger?

Thanks.

[atvfreek]

Originally Posted by mrQQ Hi guys, I would like to ask you, who have rebuilt the motors with cracked ringlands, how badly was the bore damaged? Was it ok and honing was enough, or did you need boring it out? Essentially, did you stay with 87.5 pistons or did you need to go bigger? Thanks.

The ones I have seen, the bores were fine. However, I would probably just have it over bored, as the bores are usually out of round if the engine has any sort of miles on it. Cost for overbore and hone is usually only about 250. But then milling the head, inspecting the block etc, usually add a little more on top of that.

[mrQQ]

Hm, i've read other opinions, that if possible, you should avoid boring, for reasons that you might need to redo it later, it reduces heat management and strength.

If I decide to overbore, then I might order the pistons right away. Otherwise, I need to see if I can do with 87.5's.

[Dano]

Originally Posted by atvfreek The ones I have seen, the bores were fine. However, I would probably just have it over bored, as the bores are usually out of round if the engine has any sort of miles on it. Cost for overbore and hone is usually only about 250. But then milling the head, inspecting the block etc, usually add a little more on top of that.

word...bores look like a whore's... well you know the rest.

[Lex]

Originally Posted by Dano word...bores look like a whore's... well you know the rest.

Woah you're still alive! Welcome back!

[Tomas]

Originally Posted by Dano word...bores look like a whore's... well you know the rest.

^^^ who the fuck is this noob?

[Lex]

Aaaand he's out.

[littleloogy]

It was like reading some old threads, but in real time... What a tease

Sent while cleaning my spill valve again...

[Dano]

Originally Posted by Lex Woah you're still alive! Welcome back!

yes alive...barely...but am trying to get back into the car thing.

[theurgy]

Originally Posted by Dano yes alive...barely...but am trying to get back into the car thing.

[ffz]

Model/Year: 3 MPS 2010
Mileage: 29,000
Compression Results: 170, 170, 197, 170
Cylinders /w Cracked Ringlands: #1 , #3 & #4
Suspected Event Causing Failure, Condition of Affected Cylinder(s) and Other Info: Went WOT to overtake a lorry. Glanced at Cobb to see max boost at 22.63psi on stock MAP. Waiting at next junction, smoke coming from bonnet vent. Pull into car park, car has blown dipstick.

Prior to this, when driven hard, the car would have oil dripping from the cone filter. Also, I have been getting a small oil spray from the VVT oil actuator.
Pictures:





#1



#3



#4




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[Tokay444]

Originally Posted by ffz Model/Year: 3 MPS 2010 Mileage: 29,000 Compression Results: 170, 170, 197, 170 Cylinders /w Cracked Ringlands: #1 , #3 & #4 Suspected Event Causing Failure, Condition of Affected Cylinder(s) and Other Info: Went WOT to overtake a lorry. Glanced at Cobb to see max boost at 22.63psi on stock MAP. Waiting at next junction, smoke coming from bonnet vent. Pull into car park, car has blown dipstick. Prior to this, when driven hard, the car would have oil dripping from the cone filter. Also, I have been getting a small oil spray from the VVT oil actuator. Pictures: Sent from my GT-N7105 using Tapatalk

Chris?

[ffz]

Yes Brock. Leak down was 30%, but that's fine, yeah? Lol

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[hnda etr]

Translation Below:

Originally Posted by ffz Model/Year: 2010 MS3 Mileage: 29,000 Compression Results: 170, 170, 197, 170 Cylinders /w Cracked Ringlands: #1 , #3 & #4 Suspected Event Causing Failure, Condition of Affected Cylinder(s) and Other Info: Went WOT to overtake a truck. Glanced at Cobb to see max boost at 22.63psi on stock MAP. Waiting at next intersection, smoke coming from hood vent. Pull into parking lot, car has blown dipstick. Prior to this, when driven hard, the car would have oil dripping from the cone filter. Also, I have been getting a small oil spray from the VVT oil actuator. Pictures: #1 #3 #4 Sent from my GT-N7105 using Tapatalk

[ffz]

Thanks for translation!

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[theurgy]

HAHA I think we all have watched enough Top Gear UK to understand those terms.

[Domino81]

So that's how they spell lorry. Wondered that for years.