Diesel Injector pipe leak

[PaulJS]

Im talking 4108 perkins, rolls royce eagles, the old straight six fords, cat 3306 (see here http://www.youtube.com/watch?v=T8TfYXJE-uY ) engines of that ilk and era, the fords were the only ones that bothered. The vast majority of our yacht engines are old tech as well and i would be surprised to see any serious efforts made to make sure the pipes are of the same length.
Stu
PS I set up 3 of those cats in Angola in the late 70s as the camp gennies, used to run them a month at a time in rotation. The turbos used to run red hot and the glow used to light up the gennie shed at night, We had 8 Porta kabins, a double PK kitchen unit with a walk in fridge and a walk in freezer. All electric range and full AC in all cabins. They were 135 kva each, I adjusted them to run at 1800 revs rather than the std 1500 rpm, this to up the voltage and cycles. The ware house man had orderd thinking the camp was going to be 50 Hz. It wasnt! Plus we had to adjust the windings to give 110v phase neutral and 208 (upped to about 215 by the increase in speed) phase to phase for some of the UK stuff

Love it! Proper engineering... Not just "changing the parameters" in the software. We're still running 399's and Detroits...

 

[AngusMcDoon]

Ive been a maintenance man all my life, diesels a speciality. The bit about the length of diesel injector pipe. Diesel for all intents and purposes is not compressible, therefore the "column" of diesel fuel in the pipe pushes on the injector whether it is an inch away or a mile away. Fords, old Fords, used to go to great lengths to make the pipes all the same size, others didnt. I never saw the point to be honest. Think about it!
Stu

The pressure pulse will travel through the liquid at about the sonic velocity in the fluid, same as any pressure pulse in any fluid. For diesel it is 1250 m/s at STP, but may be different at high pressure.

 

[eastlaked]

Success as last

Hi Guys,

Just to complete the story.

I managed to get a replacement pipe made up by Minster Diesel Services in Merlins Bridge, Haverfordwest for about 40 quid. The alternative was more cash and 2 or 3 weeks wait.

The guy made it up whilst I went and had a coffee on Saturday morning. Hurray I can take the kids out on the boat next week!

The probable cause was the clamps were missing off all the pipes (the other three pipes had been replaced before I bought the boat) . The vibration can cause work hardening and eventual cracking of the pipes. So I got some injector pipe clamps and fitted them.

Cheers,
David.