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318 Poly
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dels56
Posted 2020-11-09 3:17 PM (#605458)
Subject: 318 Poly


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Ok People, here is another dumb question.
"A" series Poly engine came with either solid or hydraulic lifters! When I was younger I had at 2 different time a 1956 Dodge custom Royal with a 303 (Canadian built) both of these engines had Hydraulic lifters. And that's a fact! I have a friend who today has 2 A-318's apart , one with hydraulic and one with solid. I believe both blocks have the oil galley drilled. Is there any data on which engines? 1959 - 1967 engines show part number 2808-385. From what I can figure the 55 - 58 parts book list the std lifter for a 318 as 1614-730. What is it Hyd or Solid?
Del S
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56D500boy
Posted 2020-11-09 4:37 PM (#605460 - in reply to #605458)
Subject: RE: 318 Poly



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Del: I am sure that others will answer better than me but

1614 730 = solid according to these:

https://www.hiltopautoparts.com/product/nos-mopar-valve-lifter-1956-...



And the other one seems to be hydraulic:

https://www.ebay.com/itm/1959-1967-Chrysler-Dodge-Plymouth-318-wide-...

https://www.hiltopautoparts.com/product/nos-mopar-valve-lifter-set-1...





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Powerflite
Posted 2020-11-09 5:52 PM (#605466 - in reply to #605458)
Subject: Re: 318 Poly



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Did they all use adjustable rockers, whether they were solid or hydraulic? I have a '64 318 with adjustables and a '58 318 with adjustables.
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dels56
Posted 2020-11-09 6:33 PM (#605467 - in reply to #605458)
Subject: Re: 318 Poly


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Thank you. Now all I want to figure out is Chrysler's thinking. Both of these engines we are looking at today are pre 1967. One hydraulic, one solid??????? And I still cannot find a hydraulic lifter listed for a 1956 303.
And I also remembered something else. There was a difference in the placement of the oil groove being lower in the lifter for my 56 than a 318 hydraulic.
Del
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56D500boy
Posted 2020-11-09 7:20 PM (#605470 - in reply to #605467)
Subject: Re: 318 Poly



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Location: Lower Mainland BC
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"Dodge wrapped up their unique V8s in 1958, and joined Plymouth in using A-engines in their 1959 lineup. They asked plant engineers to create a new engine that was larger than their old 325; and thus was born the unique 326 cubic inch A-series V8 — the only A engine with hydraulic valve lifters — by using a larger bore than the 318. It was rated at 255 hp and 350 pound-feet with a two-barrel carburetor. "

REFERENCE: https://www.allpar.com/mopar/a-engines.html

I think I found a listing for the 303 Canadian Lifter, i.e. 1632 126, in the 56 Chryco Parts Catalogue (hard copy) but I can't find one example photo.



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dels56
Posted 2020-11-09 8:43 PM (#605474 - in reply to #605458)
Subject: Re: 318 Poly


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Hi Expert 5k, From my recollection all the A engines used an adjustable rocker arm. There was a procedure for the adjustment when installing new hydraulic lifer which I would have to refer to the service info for.

56D500boy, My parts book is an American issue. The lifter for the Plymouth 277, 301 and Dodge 303 were probably all the same.

This satisfies my curiosity as to when/why. and I do not have a 303 anyway.

P/S I just picked up a 1972 LA318 and a 904 torqueflite. For what purpose, who knows?

Del
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56D500boy
Posted 2020-11-10 11:20 AM (#605495 - in reply to #605474)
Subject: Re: 318 Poly



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dels56 - 2020-11-09 5:43 PM
Hi Expert 5k, From my recollection all the A engines used an adjustable rocker arm. There was a procedure for the adjustment when installing new hydraulic lifer which I would have to refer to the service info for.
56D500boy, My parts book is an American issue.


Del: I am guessing that Canada never got any of those 326 "A" engines with hydraulic lifters so you would not have worked on them.

As for "Expert". LOL. I just ask a lot of questions and sometimes I get lucky looking for part numbers and then finding the parts on eBay, Hiltop, Len Dawson, etc.



Here is a 318 Poly with adjustable rockers (I guess the easiest way to check solid/hydraulic is remove the valve cover and look for the adjustment screws):



Edited by 56D500boy 2020-11-10 11:23 AM




(PlymouthStyle318PolyHead.jpg)



Attachments
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Attachments PlymouthStyle318PolyHead.jpg (140KB - 214 downloads)
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jboymechanic
Posted 2020-11-10 4:58 PM (#605511 - in reply to #605458)
Subject: Re: 318 Poly



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All three of my 318 Polys, 1960, 1962 and 1966, all have solid lifters with adjustable rockers. That's my 1962 pictured above.
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56D500boy
Posted 2020-11-10 6:37 PM (#605513 - in reply to #605511)
Subject: Re: 318 Poly



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jboymechanic - 2020-11-10 1:58 PM
All three of my 318 Polys, 1960, 1962 and 1966, all have solid lifters with adjustable rockers. That's my 1962 pictured above.


Sorry I didn't flag the photo source when I save it in my "Polyspherical Head" file. My bad.

Initially (a few years ago), I thought polys were pretty lame. However, as I learned more about them since being on this forum, I now I have to concede their brilliance, i.e. all the good cross flow breathing of the double rocker shaft ("hemi") head but with the simplicity and lower cost of a single rocker shaft head. Somebody should have (maybe did?) get the employee of the year for that design.

When I was a teenager, my dad had a 65 Plymouth Fury III with the 318 wide block but I don't remember that he ever adjusted the valves (he would have had me help). Later, I had a 68 Fury I with a 318 LA engine. I presume that was hydraulic lifter.

I need the Weertman book badly.

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dels56
Posted 2020-11-10 7:07 PM (#605515 - in reply to #605458)
Subject: Re: 318 Poly


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Nice pic of a 318, They were easy to put together until it came time to drop that darn intake in place. keeping the front and rear seal in place as you set it down was a chore. Had to glue the 2 rubber seals down to the block and hope the seal didn't move. Now remember 60 years ago...what kind of glue/sealer did we have?

And Ya! again, the rockers for both the solid and the hydraulic are the same and had adjusting screws. and you are correct, never saw a 326.
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dels56
Posted 2020-11-23 6:55 PM (#605962 - in reply to #605458)
Subject: Re: 318 Poly


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A continuation of the saga of hydraulic lifters. I just came in from my friend garage where we did a little wrenching on two 318's. Both have Hydraulic lifters. Red engine, 1967 Dodge Pickup, Blue engine, 1967 Fargo (Canadian Dodge) Pickup. Note; Red engine has adjustable Rockers and Blue engine has Non adjustable.



(A318 Adj Hyd 1.jpg)



(A318 Non Adj Hdy 2.jpg)



Attachments
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Attachments A318 Adj Hyd 1.jpg (62KB - 186 downloads)
Attachments A318 Non Adj Hdy 2.jpg (64KB - 179 downloads)
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dels56
Posted 2020-11-23 7:09 PM (#605963 - in reply to #605458)
Subject: Re: 318 Poly


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Blue engine dropped a valve. Messed up the piston but all else AOK. This engine will go to my garage in the spring and become a “science project”. The red engine was running great and will be going in another project.

Edited by dels56 2020-11-23 7:15 PM
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jboymechanic
Posted 2020-11-23 11:56 PM (#605967 - in reply to #605458)
Subject: Re: 318 Poly



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Location: Muskego, WI
No worries about grabbing my picture Dave, I did post in online for all to see after all. I think the 318 polys are good engines (why I have three of them) and are greatly under rated. For their size, they make good power and excellent torque. What lacked in these cars back in the 50s and 60s was gearing. Now that I have a 5 speed and appropriately matched rear gears, my 1960 Plymouth with stock 318 poly drives nicely and pulls hard and is quite economical (been getting 18 to 19 mpg all around driving).

Strange about your hydraulic lifter engines Del, all new to me (other than the 326 for 1959).

Edited by jboymechanic 2020-11-23 11:57 PM
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