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End711 valve seals


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Anyone have a part number for the tophats that hold the seals? Took.one motor is apart that had no seals......the other had seals in these tophat things but about half are broke. Of course no one you talk to at mack has a clue...

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Edited by Maddog13407

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Those are called "oil shields" in the service manual from 1965. I'll check for you tomorrow as it's been a while since they've given me the formal greeting I seemingly command there which is "What the fuck you after asshole"?

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Dog.jpg.487f03da076af0150d2376dbd16843ed.jpgPlodding along with no job nor practical application for my existence, but still trying to fix what's broke.

 

 

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There must have been a year these came out?63 711 I'm doing heads on has the tophat collarette s to hold a thick probably 1/2 or 3/8 seal.a bunch are broke...1965 711 I took apart for parts has totally different intake valve spring retainers,  with a liner and a common o ring around top of valves?

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I've only seen the type as shown in the book photo myself. Maybe someone has used non standard parts through the years? Machine shop could probably get something functional as a last resort.

Dog.jpg.487f03da076af0150d2376dbd16843ed.jpgPlodding along with no job nor practical application for my existence, but still trying to fix what's broke.

 

 

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I agree.nothin is original anymore and who knows what some one did. Google search for 673 or711 valve seals shows different results to.guess I'm looking for a part number for those oil shield s and the thick square cut seal that goes inside them.seems to me years ago mack sold the whole kit in like a blister pack with the tophat shields and seals?

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I have a friend outside of Rochester whom I'll pester to get onto the need. No promises but his brother or some relation was a Mack mechanic for a lot of years when the B series was routinely operated and has a bunch of parts. I'd bet a square cut "O" ring is really all you need to line the inside of the oil shield. With them being shown as separate in the manual, it's usually nothing special molded.

Dog.jpg.487f03da076af0150d2376dbd16843ed.jpgPlodding along with no job nor practical application for my existence, but still trying to fix what's broke.

 

 

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I can't remember as it's been over 30 years for me. I usually send heads in as I really don't have any automotive machine shop contacts any longer.

Dog.jpg.487f03da076af0150d2376dbd16843ed.jpgPlodding along with no job nor practical application for my existence, but still trying to fix what's broke.

 

 

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  • 2 months later...

anyone ever come up with a part number for the hat or 'oil shields'?  about ready to put this back together and Mack cant do anything without a number as Volva took back all the old Microfiche from our local dealer.......... was gonna dig out an old Tidewater book and see what i can find

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I started the research but never followed up. Do you have 11/32" valve stems?

Dog.jpg.487f03da076af0150d2376dbd16843ed.jpgPlodding along with no job nor practical application for my existence, but still trying to fix what's broke.

 

 

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On 2/7/2021 at 10:02 PM, Rob said:

Those are called "oil shields" in the service manual from 1965. I'll check for you tomorrow as it's been a while since they've given me the formal greeting I seemingly command there which is "What the fuck you after asshole"?

image.jpeg.8188e99819b0b4e9d8c071666f746ad4.jpeg

image.jpeg.4163aad8bf1d0e5c2e3c984934145365.jpeg

Nearly spit out my coffee when I read this. Too funny

V

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