Maddog13407 Posted February 8, 2021 Share Posted February 8, 2021 (edited) 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... Edited February 8, 2021 by Maddog13407 Quote Link to comment Share on other sites More sharing options...
Rob Posted February 8, 2021 Share Posted February 8, 2021 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"? 1 Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
Maddog13407 Posted February 8, 2021 Author Share Posted February 8, 2021 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? Quote Link to comment Share on other sites More sharing options...
Rob Posted February 8, 2021 Share Posted February 8, 2021 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. Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
Maddog13407 Posted February 8, 2021 Author Share Posted February 8, 2021 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? Quote Link to comment Share on other sites More sharing options...
Rob Posted February 8, 2021 Share Posted February 8, 2021 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. Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
Maddog13407 Posted February 8, 2021 Author Share Posted February 8, 2021 been some years since i tore a 237 head apart, do they share the same seals and tophat oil shields?? Quote Link to comment Share on other sites More sharing options...
Rob Posted February 8, 2021 Share Posted February 8, 2021 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. Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
Maddog13407 Posted April 25, 2021 Author Share Posted April 25, 2021 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 Quote Link to comment Share on other sites More sharing options...
theakerstwo Posted April 25, 2021 Share Posted April 25, 2021 If its got a turbo installed i would leave them off. Quote glenn akers Link to comment Share on other sites More sharing options...
Maddog13407 Posted April 26, 2021 Author Share Posted April 26, 2021 Non turbo 711 Quote Link to comment Share on other sites More sharing options...
Rob Posted April 27, 2021 Share Posted April 27, 2021 I started the research but never followed up. Do you have 11/32" valve stems? Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
Vmac3 Posted April 28, 2021 Share Posted April 28, 2021 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"? Nearly spit out my coffee when I read this. Too funny V Quote Link to comment Share on other sites More sharing options...
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