Thread: TD5 Diesel Oil Contamination

Originally Posted by RuaTD5

After the last time they looked at it they made a comment that they thought that the port in the head for one of the injectors looks like it's too large by about 1 thou. Has anyone heard of this before?

Gee, that's fantastic eyesight they have. 0.001" difference by eye .


I haven't heard of injectors being too small before but it does seem to be the later Td5s that seem to suffer this problem more than others so there might be something in this.

Was the head replaced for the same issue or has it just emerged afterwards? Were the original injectors re-used?

I know theres a difference between the older (premy03) injectors and the newer ones (post my03) but I didnt think that body size was one of the differences.

1 tho of an inch is squidly unless the seals are already compressed as in someone reused a seal on an injector because they couldnt get one off....

1 thou, for a basic mechanic is also an acceptable tolerance for measuring with a set of expanding bore gauges and micrometer. if you want to find out the exact sizing of the holes it needs to go to a professional machine shop.The

the seals on the injector body are intened to accomodate minor changes in machining. and my guess is that theres some damage been done to the head at some stage. If its only been fixed for a short time and headwork was what it went in for then you have some limited coverage under warrenty.

Any time I do anything other than the injector harness on the head of a TD5 the owner gets specific instuctions on what might be a potential problem or to bring it back in a weeks time for further inspection.

Id suggest that you can DIY the diagnosis and if its just a leaky injector seal replacing the seals is almost something you can do yourself or with the help of someone whose confident with the feeler gauges for setting the bump clearance.

Originally Posted by Scouse

Gee, that's fantastic eyesight they have. 0.001" difference by eye .


I haven't heard of injectors being too small before but it does seem to be the later Td5s that seem to suffer this problem more than others so there might be something in this.

Was the head replaced for the same issue or has it just emerged afterwards? Were the original injectors re-used?

Scouse,

You'd think we such good eyesight they could actually see where the diesel was coming from

The last time I had the cracked head they found after pressure testing the head that there was a crack in one of the fuel galleys.

The original injectors were re-used with the head bought through Rimmer Bros in the UK (exchange rate made it worthwhile).

With the later TD5's you know of was the issue due to cracked heads or the injectors?

The only head that I've personally been hands on with thats had cracked injector galleries was on that was well and truely cooked and a butcher mechanic down near canberra had tried to press it flat before machining the face.

Originally Posted by RuaTD5

With the later TD5's you know of was the issue due to cracked heads or the injectors?

All the one's I've seen have eventually had it fixed with replacement injectors. That's only with 6 or so cars though & there were quite a few checks before they had the injectors done.

Originally Posted by Blknight.aus

The only head that I've personally been hands on with thats had cracked injector galleries was on that was well and truely cooked and a butcher mechanic down near canberra had tried to press it flat before machining the face.

Luckily mine didn't run away on me and Coopers hadn't seen one before mine either. To make matters worse I was only 3mnths out of warranty. LRA wanted me to bring the Disco complete into one of the dealerships to confirm the issue and to determine whether they would assist but at that stage it was in pieces in the workshop. Having no confidence in them and not wanting to risk paying for the rebuild labour twice I just went and got it fixed.

Im assuming the $6k went on a new head? if so how long ago was the head replaced, it may be covered under the initial parts warrenty for he replacement head.

I sort of suspect that its going to turn out to be an incorrectly seated injector or blown seal.

According to the first post, the head is 2yo.