"Type 5" Valvetrain?
"Type 5" Valvetrain?
(OP)
Anyone know what a "type 5" valvetrain is? I've got a guy at work with a question about a "type V valvetrain with an intermediate pushrod and rocker arm."
Presumably if there's a "type V" valvetrain, there are other types as well... I'd really appreciate a brief list of what these types are (I thru V and higher).
Presumably if there's a "type V" valvetrain, there are other types as well... I'd really appreciate a brief list of what these types are (I thru V and higher).





RE: "Type 5" Valvetrain?
1) OHV pushrod system (cam-lifter-pr-rocker-valve)
2) OHV/OHC system (cam-rocker-valve)
3) OHV/OHC with multiple rockers (cam-rocker-valve)
4) OHV/DOHC direct attack system (cam-bucket follower-valve)
Are these considered "standard valvetrain-type numbers?"
RE: "Type 5" Valvetrain?
RE: "Type 5" Valvetrain?
The Rover inline 6,one cam with bucket inlet and rocker exhaust.
More likely the BMW boxer,cam in head,with pushrod and rocker.
RE: "Type 5" Valvetrain?
I'm not looking for guesses as to what "intermediate pushrod and rocker arm" means, as I think the name is pretty descriptive (although I didn't know of any examples, thanks NickB), or guesses as to what "type V" might be.
I'm interested in knowing whether there is any standard numbering convention out there for the different valvetrain configurations, and what types of valvetrains correspond to the various numbers. (a definitive answer, such as "this organization put out a list of valvetrain types, and here they are" or "Ford refers to this as type 1, this as type 2, this other thing as type 3, something else as type 4, and type 5 is like so.")
RE: "Type 5" Valvetrain?
Tyep 2: Finger Follower Type - cam>end pivot rocker arm roller>valve
Type 3: Center pivot rocker arm - cam>center pivot rocker arm> valve
Type 4: Cam>lifter>rocker arm>valve
Type 5: Cam>lifter>pushrod>rocker arm>valve
Examples
Type 1: Porsche Variotech technology
Type 2: Ford modular
Type 3: Honda VTEC
Type 4: Generaly not used
Type 5: Small block chevy, big block chevy, small block MoPar, etc.
Hope this helps.
RE: "Type 5" Valvetrain?
RE: "Type 5" Valvetrain?
If you look in the June 2002 edition of "Engine Technology International" on Page 64, there is an article on valve trains by my erstwhile collegue David Turner, now at Eaton Corp. Page 66 illustrates the various types, as the earlier post indicated.
PJGD