https://www.tapatalk.com/groups/australiangelandewagenownersassociation/om617-a-as-differs-from-om617-t1463.html

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All Diesel Fleet
1985 R107 300SLD TURBODIESEL
2005 E320 CDI (daily)

LOTS of parts for sale!


EGR block kit
http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html

1985 CA emissions 617 owners- You Need This!
Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst.

Sanden Instalation Guide (post 11):
http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html

Using the 1978 SAE paper on the 617A isn't a great source. There were many changes implemented to both turbo and NA engines after it was published.
(Prechamber design and associated piston crown changes, camshaft lift and material, glow plug type are ones on the top of my head)

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1978 300D, 373,000km 617.912, 711.113 5 speed, 7.5mm superpump, HX30W turbo...many, many years in the making....
1977 280> 300D - 500,000km+ (to be sold...)
1984 240TD>300TD 121,000 miles, *gone*
1977 250 parts car
1988 Toyota Corona 2.0D *gone*
1975 FJ45>HJ45
1981 200>240D (to be sold...)
1999 Hyundai Lantra 1.6 *gone*
1980s Lansing Bagnall FOER 5.2 Forklift (the Mk2 engine hoist)
2001 Holden Rodeo 4JB1T 2WD

This is the SAE paper: https://www.sae.org/publications/technical-papers/content/780633/
Its very well worth buying, there are a lot of insightful pictures included with the information.



The only change to the 617a after 1978 was an update to the camshaft profile and hardened face followers in 1981.
The non-turbo 617 received the 617a's pencil glowplugs, updated prechambers and updated camshaft parts in 1981. Mainly to maintain parts commonality, but they got a minor power increase from 79hp to 87hp.


After that, all changes were external; A smaller 0.9:1 (instead of 1.1:1) water pump pulley in 1984 and EGR/ARV/TrapOx for emissions in 1984/85.