Injector clamp broken

[RCZKENT]

Hi Guys, I had to call the AA out this morning when my diesel RCZ lost power and started to smoke under the bonnet, turns out I have a broken injector clamp on cylinder 4. Has anyone had this problem and can tell me what the likely causes are? AA guy says it can just happen, and is a problem with other manufacturers, but not a know Peugeot issue. I will be inspecting later, but just want a heads up on what to be looking out for. Also, I know that I will need to replace the injector seals, is there anything else that will need replacing (assuming injector is ok)? Do the injector clamps use stretch bolts? Thanks in advance for your advise.

 

[Pedro]

Your engine mounts OK ?

 

[RCZKENT]

Your engine mounts OK ?

Yes, they are good. Can you explain how a worn engine mount can cause a broken injector clamp?

 

[Pedro]

Its amazing what a worn engine mount will do as in vibrations unusual movements or in your case maybe it was damaged fractured previously or even had metal fatigue ?

 

[RCZKENT]

Its amazing what a worn engine mount will do as in vibrations unusual movements or in your case maybe it was damaged fractured previously or even had metal fatigue ?

Ok, I was more interested to see if there were any inherent faults that caused this?

 

[Verminator]

Not heard of any other rcz hdi with that problem or any other models with the same Hdi engine in..

 

[RCZKENT]

Well, taken the injector out today and all is good, I was worried that the injecter had come apart and caused the damaged to the clamp. Maybe it was over torqued, although not touched since I've owned it. Can anybody give me the correct torque for the clamp bolts and tell me if these are stretch bolts?

 

[Pedro]

Yea its been torqued to death & with a lot of cast metal engine parts its one to be wary of as you have unfortunately found out the bolts have to be renewed as per the spec for theses engines anyway as they are termed as stretch bolts I don't know torque settings on the diesel but I did hear on some engines the 8v clamps were more robust then the 16v ?

 

[RCZKENT]

Mine is as diesel, as mentioned in the post, so 16v or 8v is not relevant to my engine. Any one know the torque for the injector clamps?

 

[jimmy tomkins]

Not heard of any other rcz hdi with that problem or any other models with the same Hdi engine in..

 

[jimmy tomkins]

Mine is as diesel, as mentioned in the post, so 16v or 8v is not relevant to my engine. Any one know the torque for the injector clamps?

 

[Ed wales]

Happens to me on the way to work and told a common issue by the engineer in work who does mots on the days off .
Change all 4 if you can

 

[jimmy tomkins]

Ok, I was more interested to see if there were any inherent faults that caused this?

My rcz012 has broken 6 clamps I tried different torques new bolts engine mounts.at this stage is am renenforcing the new ones with a run of weld on both sides of the new ones, just about room for that- so far they are holding

 

[jimmy tomkins]

I finally figured out what was causing the injector clamps to break ' I would torque the bolts to 7nm - then after a 10 minute drive I would check the torque again all ok.
Then after another 5 min drive- check torque again all ok
Then after another 5min drive check again. This time two of the bolts took 4 quarter turns to reach 7nm!!.
so what was happening was the bolts were loosening and and the vibration was snapping the clamps from the injector. Moving!
8 new clsmps later. And my brain fried!.so now i am going to " locktite " all four clams..none of the " experts " told me that the bolts had to be " locktitened"!!

 

[jimmy tomkins]

Another injector fork broke today.i checked the torque all ok .then after 10 minutes drive another fork broke ! So now new copper washer.ream the injector hole. Everything clean. This is 3rd time!

 

[EddieJ]

broke again after your run of weld and loctite?
There has to be another factor playing a part.

When you are replacing them make sure your are getting the threads as clean as possible, some brake cleaner into the threads and blow out with an airline perhaps. When you torque it, it should be cold, and re torque checking should be cold too as when head gets at things there is a slight level of thermal expansion coming into play, which if checking at varying rising temperatures could show as a bit loose. It could be the additional torquing whilst it’s heating through is causing over torquing.