merc 270 cdi injector seals

[chrisbrad66]

Hi all, i've got a merc 270 cdi engine in a jeep, number 5 injector seal is weeping, i have removed the injector twice, fitted new washers and stretch bolts but it still refuses to seal fully, i have even recut the seat using the special reamer you can buy but to no avail, has anyone had a similar problem with one that refuses to seal? Help needed please!!!!

 

[carat 3.6]

Did you use the correct shape tip on the reamer?

 

[chrisbrad66]

i used the one that came with the tool, its not removable, i bought it from hutsons in widnes, its the only one they do for the 270 cdi engine i was led to believe, i have used the same tool before on sprinter engines and never had a problem

 

[murray motors]

yes had this before had to change the injector i only use mb cooper washers make sure every thing is spot lessy clean put a slight bit of fire cement over the cooper washer (exhaust paste) this will seal a bit better and keep the heat away from the washer

 

[Ian B Walker]

Always run a tap down the stretch bolt hole. Doing this ensures that there is no debris in the thread or at the bottom of the hole. Then Torque it up to 7nm then 90 degrees and a further 90 degrees.

 

[chrisbrad66]

Thanks to all for the advice, the washer finally sealed after the third attempt and a third seat recut, i keep checking it everyday and all appears well! Fingers crossed

 

[BlackC55]

Cut the injector flat too.