Overflow valve adjusted
I adjusted my Overflow valve from around .400 to .500 as recomended on a post i was grazing through the other day.
Man!
It DOES make a difference in lower rpm! Thats great!
But.....now i have an annoying ticking coming from the engine, most noticable when listening through the driver wheel well or under the driver door. Is this from the overflow valve?. It has been replaced and if i remeber correctly it was replaced shortly before i bought the truck in DEC 03 to unsuccessfully cure a hard start problem. Is this overflow valve bad now since it was out of spec? I know spring stretching is for the birds, so i guess i need a new one now?
Wadaya think? TIA -Jake
Man!
It DOES make a difference in lower rpm! Thats great!
But.....now i have an annoying ticking coming from the engine, most noticable when listening through the driver wheel well or under the driver door. Is this from the overflow valve?. It has been replaced and if i remeber correctly it was replaced shortly before i bought the truck in DEC 03 to unsuccessfully cure a hard start problem. Is this overflow valve bad now since it was out of spec? I know spring stretching is for the birds, so i guess i need a new one now?
Wadaya think? TIA -Jake
It's simple, remove the old one, put it in a new one. Stuff a rag below so you don't lose the gaskets.
Don't bend the steel fuel line to remove it, on some trucks you have to file or grind a little off the indented spot on the head to get it out. Newer OF valves don't come with what the diagram calls a retainer, they are one piece but work just the same
Object at lower left is the oil fill cap

Buy one here-
Precision Diesel Injection and Turbo Inc.
Marty Tompkins
toll free 888-734-7349
$24+ $5 shipping and handling.
Don't bend the steel fuel line to remove it, on some trucks you have to file or grind a little off the indented spot on the head to get it out. Newer OF valves don't come with what the diagram calls a retainer, they are one piece but work just the same
Object at lower left is the oil fill cap

Buy one here-
Precision Diesel Injection and Turbo Inc.
Marty Tompkins
toll free 888-734-7349
$24+ $5 shipping and handling.
The OF valve is just a part that wears out. Unless you have a fuel pressure gauge to monitor it you're pretty much guessing at it's condition until it gets real bad.
Symptoms when the fuel pressure is too low are: low RPM miss/instability, white smoke, hard starting, engine dies at idle and low power.
Fuel filter cracking and hose leakage if the pressure goes the other way and is too high.
Symptoms when the fuel pressure is too low are: low RPM miss/instability, white smoke, hard starting, engine dies at idle and low power.
Fuel filter cracking and hose leakage if the pressure goes the other way and is too high.
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
1320
12 Valve Engine and Drivetrain
11
Apr 27, 2004 11:53 AM



