1947 Flathead Question
Thread Starter
|
Junior User
Joined: Feb 2007
Posts: 64
Likes: 0
From: Colorado Springs
1947 Flathead Question
I recently bought a 47 ford pickup, it has a 6cyl flathead. I have been try'n to figure out what is going on, the engine runs well and i can drive it. I was trying to do some work on the GM carb that was on it...and after starting it up...it dumped alot of oil/gas all over the garage floor from what looks like an overflow tube on the passenger side of the block. What could have caused this? Is this normal? Any idea how to fix this? Thanks for the help in advance.
Brad
Brad
Elder User
Joined: Apr 2004
Posts: 970
Likes: 3
Sounds to me like you dumped that stuff out of the crankcase breathers road draft tube. What caused it I would guess is too rich a mixture, washing the oil
off the cylinder walls resulting in fuel passing into the crankcase. Smell the oil, does it smell like gas? The Rochester carb may work if jetted correctly and set up properly, I would be looking for an alternative.
off the cylinder walls resulting in fuel passing into the crankcase. Smell the oil, does it smell like gas? The Rochester carb may work if jetted correctly and set up properly, I would be looking for an alternative.
Thread Starter
|
Junior User
Joined: Feb 2007
Posts: 64
Likes: 0
From: Colorado Springs
Thanks Alot....that makes sense. When I changed the oil last weekend it was like 75 % Gas....kinda scared me a bit. Looks like I'm either gonna have to rebuild the Carb or look for a Holly 94 I think to go on it instead. Thanks again for the Info
Brad
Brad
Lead Driver
Joined: Oct 1999
Posts: 6,776
Likes: 553
From: Kalispell, MT
If you've got that much fuel in the crankcase it could be the fuel pump. I not up on the 6's but the V8's have a tendency for the diaphragm in the pump to rupture and most of the gas goes into the crankcase. Not good for anything that needs oil to make it slippery.
Drain the case immediately, refill with oil, disconnect the fuel line and turn it over to re-lube your bearings. Probably should do another oil change after that.
Drain the case immediately, refill with oil, disconnect the fuel line and turn it over to re-lube your bearings. Probably should do another oil change after that.
Senior User
Joined: Aug 2006
Posts: 257
Likes: 0
From: Minnesota
I would agree with mtflat here. I don't think this problem was limited to the V8 flatheads. I saw this same problem with a 70s vintage 351M. The fellow asked me to see how hard it would be to replace his rear engine seal because it was starting to leak on his driveway (he also wanted an oil change at that time and I filled up my 5 quart oil pan, and emptied and filled it 1/2 way again). Since the oil was mostly all gas I went after the pump. It turned out that there was a port on the side of the fuel pump that would normally dump the gas to the ground but it had plugged and was dumping straight to the crankcase.
Thread
Thread Starter
Forum
Replies
Last Post
Danny in CO
1948 - 1956 F1, F100 & Larger F-Series Trucks
24
Mar 27, 2024 07:09 AM
twise
1948 - 1956 F1, F100 & Larger F-Series Trucks
3
May 21, 2009 02:26 PM
sancochojoe
Flathead V8 & Flathead 6
1
Apr 14, 2004 12:54 PM
