what is this and how do i make it stop leakin

[jrobinson5093]

I believe I have traced a fuel leak down to the 12 point bolt on the side of the hydro head of the ip. I didnt wanna just pull it out and mess something up. so what can yall tell me about it?

 

[treeguy]

I can't really help much, but that 12 pointed stud looks awful similar to the 12 pointed stud used to house the fuel delievery valve on the MEP injection pumps. Without looking at a TM, thats what I think it is.

 

[Dirtygrunt]

Those are common if you pull it out and look at the threads its probably cracked ill look around and see if I have an extra one I can send ya.

 

[jrobinson5093]

I dont know what it is. But fuel keeps gettin all over the IP and i have cleaned it off several times and this is where I say it is comin from.

 

[jrobinson5093]

It wont hurt any thing to pull it out, nothing as gonna shoot out or cause any thing to mess up. I figured there might be a o ring or something busted.

 

[Dirtygrunt]

The bolt has a shoulder on it no oring there was a spring in it but nothing going to shoot out or anything

 

[jrobinson5093]

Ok thanks im gonna take it out tomorrow and see what i can see. thanks for the info

 

[hoop]

I have had that problem.....It comes from over pressurization(I think), try backing your fuel off some. I replaced mine several times and it would crack the new one in just a few days. I finally backed the fuel off and really slowed the leak down. Mine would only leak during pulling RPM's. As said just a tiny spring behind it.
It cracks between the hole and the shoulder of the bolt.

 

[jrobinson5093]

I dont see a crack any where and i didnt have my fuel turned up when it started leakin. it does have a little pitting on it but not on the sealing surface.

 

[m-35tom]

it is the fuel delivery check valve and if it leaks when properly torqued, or starts leaking again after you fix it, you have an injector that will not take the flow of fuel. it is a very important part of the ip but should never require servicing. see the ip manual for specs.

tom

 

[Seth_O]

I had this exact same leak on mine. Came on very suddenly and for no apparent reason. I replaced that bolt with a good take-off, tightened it to spec and it's never leaked since.

I could not visually see any problem with the old, or any difference b/n the old bolt and the new. I think I used a medium sized metric wrench (11 or 12mm maybe?) - it fit perfectly.

 

[jrobinson5093]

I fixed that leak now the cover below it with the two bolts holding it on the ip is leakin

 

[m-35tom]

that is engine oil, just replace the gasket

tom

 

[jrobinson5093]

i will get to that tomorrow i hope is there any trick to gettin it off

 

[whyme]

"delivery valve screw" as its referenced on the plate next to it (yours is obviously painted over). the torque 48 ft lbs and as stated prior if it leaking its prob cracked threads. its an expensive little screw if you can find it. be aware that there is a tiny spring that sits behind it and will likely come out when you remove the screw.

i dint notice the cracking the first time i removed it but after re torquing it was more obvious, i assume there was a micro fracture and given the fuel pressure its no wonder it leaked.


Edit: darn, guess i was too late to help, glad it worked tho.

 

[Seth_O]

i will get to that tomorrow i hope is there any trick to gettin it off

No tricks or surprises. It just unbolts and pulls off. I pulled mine off very slowly and very carefully - wary of anything small and spring-loaded that could go flying off and disappear forever. It turned out to just be the stop cable attached to a bracket.

Clean it up and put on a new gasket, I don't think permatex will do any harm there either.