Wrecker Rebuilder Posted March 10, 2017 Share Posted March 10, 2017 Posted under engine but will post here since more people seem to read it. I am restoring a 1949 LF with a 505 engine. Anybody got the specs for this engine? Machine shop needs them. Tom in Atlanta Quote Link to comment https://www.bigmacktrucks.com/topic/49085-help-lf-mack-restoration-engine-specs/ Share on other sites More sharing options...
russell t Posted March 10, 2017 Share Posted March 10, 2017 Mack used 510 during this period, and there was an a505 model fire truck around 1950. please clarify, What engine specs. do you need. I have Motors repair manuals for that period that list bore/stroke and crank bearing specs, I will check in the AM. I am working of a 1937 BM truck and get no response to any posted questions it seems like no one left from the earlier vintage, Quote Link to comment https://www.bigmacktrucks.com/topic/49085-help-lf-mack-restoration-engine-specs/#findComment-363963 Share on other sites More sharing options...
fxfymn Posted March 10, 2017 Share Posted March 10, 2017 If you can wait the best bet is to send the chassis number to the Mack museum, along with a suitable donation, to get the complete specs you need along with a wealth of information about the truck. I am no expert on these trucks, but I believe the standard gas engine of the time was the 707A. The 510 was used in the E and A models and I am not certain it was used in the L models. Quote Money, sex, and fire; everybody thinks everyone else is getting more than they are! Link to comment https://www.bigmacktrucks.com/topic/49085-help-lf-mack-restoration-engine-specs/#findComment-363994 Share on other sites More sharing options...
1958 F.W.D. Posted March 10, 2017 Share Posted March 10, 2017 (edited) If you happen to receive this, and can get me the truck serial number prior to 0800 tomorrow morning (3/11/17)I offer no promises, but I **MAY** be able to tell you what engine was originally installed. But I need that before 8am tomorrow, and you may not ask any questions as to how I obtain the info. Edited March 10, 2017 by 1958 F.W.D. Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/49085-help-lf-mack-restoration-engine-specs/#findComment-364043 Share on other sites More sharing options...
russell t Posted March 11, 2017 Share Posted March 11, 2017 My Manual shows the 49 LF used a 510A engine 4 7/16 by 5 1/2 bore and stroke. Crank pin diameter, 2.9975, rod bearing clearance .001 to .003, rod torque 100 to 105, main bearing journal number 4 and 7, 3.4970, with.002- .0045 clearance, and all others, 3.4975 with.001-.0035 clearance, torque 100-105. I hope this will help. Sure is odd having two main journal dimensions and only .ooo5 difference. Mack made gas engines during this period from 271 cu.in. to 707 cu.in. Quote Link to comment https://www.bigmacktrucks.com/topic/49085-help-lf-mack-restoration-engine-specs/#findComment-364088 Share on other sites More sharing options...
Wrecker Rebuilder Posted March 14, 2017 Author Share Posted March 14, 2017 Thanks EVERYBODY!!!!!!!!!!! Mine says 505 stamped on it but I think its a 510A. Quote Link to comment https://www.bigmacktrucks.com/topic/49085-help-lf-mack-restoration-engine-specs/#findComment-364433 Share on other sites More sharing options...
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