Diesel ex. valve seat pressure
Diesel ex. valve seat pressure
(OP)
I have asked Cummins and around diesel forums with no replies: there are many general references to the Cummins 4B and 6B engine's exhaust valves being 30 lbs spring stock or 60 lbs spring in HD apps. That doesn't seem near enough pressure to me, in comparison with many spark ignition gassers. What do you say, is this simply slang terminology, or is that an actual spring pressure/tension figure? Further explanations for a somewhat 'challenged' diesel owner much appreciated!
I plan on fabricating an exhaust brake with the actuator spring-tensioned to 10% below valve spring actual pressures to keep valves out of piston contact etc. Thanks,
Starspangled
I plan on fabricating an exhaust brake with the actuator spring-tensioned to 10% below valve spring actual pressures to keep valves out of piston contact etc. Thanks,
Starspangled





RE: Diesel ex. valve seat pressure
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Diesel ex. valve seat pressure
What is the Cummings spec. The OEM engineers probably have a rough idea of what is required.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Diesel ex. valve seat pressure
Your info is more than sufficient to answer my question as it just didn't seem possible to me. It's not SI, and it's all new to me! Thanks...