I was wrenching in tech school when these came out. I can assure you that they were built on the small block 350 platform, with a different crank and pistons, I believe.
I can't comment on the top end, as I don't recall any details about it. I will say that the Roosamaster distributor pump has very tight clearances in the fuel distributor portion, and lubrication from the fuel is critical to its proper operation. If you ran anything but diesel in one of these (Roosamaster) whether they were on a GM diesel conversion or anything else, I can guarantee it will fail within minutes. There was a known issue with mains failing due to the bolts not being adequate to handle the pressures on the crank. GM later drilled out the bolt holes and used longer bolts. I suspect the problems manifested themselves in the top ends as well, although I never saw this myself. A little known fact: There was also a 260 CID "converted" diesel that was only sold in Oldsmobiles for a couple of years, sometime in the late 70s. It, like it's larger counterpart, was an equally disasterous engine. The difference was that the block was sleeved for some reason, effectively reducing the volume of the compression chamber. We had one of these in the shop, and were totally perplexed by it. Dan ________________________________ From: Dieselhead <126die...@gmail.com> To: Mercedes Discussion List <mercedes@okiebenz.com> Sent: Saturday, November 26, 2011 2:41 PM Subject: Re: [MBZ] mixing diesel and gasoline Call it what you want. Compared to even an old OM621 or an OM636, or a JD, IH, Cummins, Detroit, Cat, Perkins, or even a petter, it is a crappy engine. > That is purportedly just a rumor. Theres no doubt GM cheaped out on head > bolts and the 350 diesel apparently makes a great base to build a gasser > engine on but its not a dieselized gasser. > > -Curt _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
