what up HAMBers... ....getting started on my caddi flatty...I need to make new plug wires but I need to know the firing order..I poked around and couldn't find anything...I know there are a few guys here that are the guru's at these engines....please chime in fellas!! Aaron
1 8 7 3 6 5 4 2 for the 1936 to 1941 V8's, as well as the post-war flatheads. The 1935 firing order is 1 2 7 8 4 5 6 3. If you happen to have a 1935 or 1936 LaSalle motor (looks the same as Cadillac, crank and some other components are different) the firing order is 1 6 2 5 8 3 7 4. LaSalle 1937 and later is the same as the later Cadillac flatheads. I assume you're talking the V8, right?
yes it's a V8 346 and the year is 48....has a hydro tranny still attached but this sucker will not rotate.....tried every gear position but still will not rotate....any ideas.....it moves a little but not a compleat revolution...any input would help..Aaron
Ach....It sounds like something is in one of the planetary sets... Disassembly is indicated, dont force it.
more info please......at first I was think I need to pull the heads...so you think it's in the tranny!!!!
Where the hell were you guys so quick off the mark when I asked the same question!?! Good luck with the start, 47. Ironically I need new wires made up too!
Engine Specifications: 1948 Cadillac 346 V8. GENERAL SPECIFICATIONS ... Firing Order: 18736542 (front to rear: Right bank 2-4-6-8, left bank 1-3-5-7) Passenger side first cylinder is #1
Here's all info for 1948.. <TABLE cellSpacing=0 cellPadding=0 border=1><TBODY><TR><TD align=middle>Year</TD><TD noWrap align=middle>Prod Total</TD><TD align=middle colSpan=2>Model Designation</TD><TD noWrap align=middle>Wheel base Inches</TD><TD noWrap align=middle>Weight Min/Max</TD><TD noWrap align=middle>Tire Size</TD><TD noWrap align=middle>Wheel Bolt Pattern</TD><TD noWrap align=middle>Valve Location</TD><TD noWrap align=middle>Bore and Stroke</TD><TD noWrap align=middle>Piston Dis place ment Cubic Inches</TD><TD noWrap align=middle>Com pres sion Ratio (Stan dard)</TD><TD noWrap align=middle>Maximum Brake H.P. @ R.P.M.</TD><TD noWrap align=middle>Spark Plug Type</TD><TD noWrap align=middle>Spark Plug Gap</TD><TD noWrap align=middle>Point Gap</TD><TD noWrap align=middle>Firing Order</TD><TD noWrap align=middle>Ignition Timing BTDC or Mark</TD><TD noWrap align=middle>Grnd +/- Volts</TD></TR></TBODY></TABLE> <TABLE cellSpacing=0 cellPadding=0 border=1><TBODY><TR><TD vAlign=top align=middle rowSpan=4>1948</TD><TD noWrap align=right>6,561</TD><TD noWrap>V8</TD><TD noWrap align=middle>48-60S</TD><TD noWrap align=middle>133</TD><TD noWrap align=middle>4356/4356</TD><TD noWrap align=middle>8.20x15</TD><TD noWrap align=middle>5 x 5</TD><TD noWrap align=middle>In Block</TD><TD noWrap align=middle>3 1/2 x 4 1/2</TD><TD noWrap align=middle>346</TD><TD noWrap align=middle>7.25</TD><TD noWrap align=middle>150 @ 3400</TD><TD noWrap align=middle>AC 48</TD><TD noWrap align=middle>.028</TD><TD noWrap align=middle>.015</TD><TD noWrap align=middle>18736542</TD><TD noWrap align=middle>IGA or IGN</TD><TD noWrap align=middle>-6</TD></TR><TR><TD noWrap align=right>8,603</TD><TD noWrap>V8</TD><TD noWrap align=middle>48-61</TD><TD noWrap align=middle>126</TD><TD noWrap align=middle>4068/4150</TD><TD noWrap align=middle>8.20x15</TD><TD noWrap align=middle>5 x 5</TD><TD noWrap align=middle>In Block</TD><TD noWrap align=middle>3 1/2 x 4 1/2</TD><TD noWrap align=middle>346</TD><TD noWrap align=middle>7.25</TD><TD noWrap align=middle>150 @ 3400</TD><TD noWrap align=middle>AC 48</TD><TD noWrap align=middle>.028</TD><TD noWrap align=middle>.015</TD><TD noWrap align=middle>18736542</TD><TD noWrap align=middle>IGA or IGN</TD><TD noWrap align=middle>-6</TD></TR><TR><TD noWrap align=right>34,213</TD><TD noWrap>V8</TD><TD noWrap align=middle>48-62</TD><TD noWrap align=middle>126</TD><TD noWrap align=middle>4125/4449</TD><TD noWrap align=middle>8.20x15</TD><TD noWrap align=middle>5 x 5</TD><TD noWrap align=middle>In Block</TD><TD noWrap align=middle>3 1/2 x 4 1/2</TD><TD noWrap align=middle>346</TD><TD noWrap align=middle>7.25</TD><TD noWrap align=middle>150 @ 3400</TD><TD noWrap align=middle>AC 48</TD><TD noWrap align=middle>.028</TD><TD noWrap align=middle>.015</TD><TD noWrap align=middle>18736542</TD><TD noWrap align=middle>IGA or IGN</TD><TD noWrap align=middle>-6</TD></TR><TR><TD noWrap align=right>1,262</TD><TD noWrap>V8</TD><TD noWrap align=middle>48-75</TD><TD noWrap align=middle>136</TD><TD noWrap align=middle>4780/4959</TD><TD noWrap align=middle>7.50x16</TD><TD noWrap align=middle>5 x 5</TD><TD noWrap align=middle>In Block</TD><TD noWrap align=middle>3 1/2 x 4 1/2</TD><TD noWrap align=middle>346</TD><TD noWrap align=middle>7.25</TD><TD noWrap align=middle>150 @ 3400</TD><TD noWrap align=middle>AC 48</TD><TD noWrap align=middle>.028</TD><TD noWrap align=middle>.015</TD><TD noWrap align=middle>18736542</TD><TD noWrap align=middle>IGA or IGN</TD><TD noWrap align=middle>-6</TD></TR></TBODY></TABLE>
Hard to tell if it's the engine or trans that is causing the issue, only way to tell for sure is separate them. How long had it been sitting, and in what conditions? If it's been sitting for a few years it's more than likely that the engine has a tight spot. Squirt a few ounces of your favorite rust buster down each spark plug hole, let it sit for a couple days, and see if it turns any easier.
Good luck breaking it apart. I had a tight spot in my caddy 8 with a Hydro. You need to pull the what seemed like 60 bolts that hold the TQ together and if it is stuck , you may have to pull the crank attached to the tranny to unbolt it from the tranny. Unless you break some portholes into the bell housing to gain access. GOOD LUCK I got mine seperated after about three days of work. Ended up being a stuck valve that was locking it up. Tore into it, loosened up the valve. Now it rotates 360 with no problems after sitting 30 some years.
This kind of what I'm thinking it is.....what were the steps you did to fix the stuck valve...and on that note what was the torque on the head bolts and in what sequence...thanks for the help....Aaron
This will prove very valuable. http://www.books4cars.com/result2.asp?findyear=&imageField2.x=15&imageField2.y=9&offset=50 Since you will be bustin wrenches on that bad boy you should buy a manual and most all your questions will be answered.