Labrauer Posted March 6, 2016 Report Share Posted March 6, 2016 (edited) Hey guys I have a question on the oil filler tube on a 218ci engine that I can't remember which way the cap faces. Does the cap on top of the oil filler tube face towards the radiator or back of the engine as far as the opening with the screen or does it amke a difference. Thanks in advance, Larry Edited March 6, 2016 by Labrauer Quote Link to comment Share on other sites More sharing options...
Frank Elder Posted March 6, 2016 Report Share Posted March 6, 2016 I'm looking at page 222 of my dodge shop manual for 1946 through 49 and it shows the screen facing the fire wall.....kinda like cowl induction. Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted March 6, 2016 Report Share Posted March 6, 2016 Most caps and tubes have a dimple and slot so they only go on one way. Screen to the firewall is correct. 1 Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted March 6, 2016 Report Share Posted March 6, 2016 if it has the screen window, it should face the firewall so to draft the crankcase... Quote Link to comment Share on other sites More sharing options...
Labrauer Posted March 7, 2016 Author Report Share Posted March 7, 2016 Thanks much guys. I thought that was the way but was not sure because of the vacuum tube that runs from the distributor to the carburetor base seems to be in the way. The filler tube has a crick in it so I will have to turn it a little to let the tube get past it. Thanks again Larry Quote Link to comment Share on other sites More sharing options...
laynrubber Posted March 22, 2016 Report Share Posted March 22, 2016 Hmm I may have installed my tube backwards then.....mental note, go to garage tomorrow and check. Quote Link to comment Share on other sites More sharing options...
dale Posted March 22, 2016 Report Share Posted March 22, 2016 I like the color !!! Quote Link to comment Share on other sites More sharing options...
laynrubber Posted May 14, 2016 Report Share Posted May 14, 2016 Ok, so in my wisdom.....I installed my fill tube 180* off and my cap opening faces forward. haven't driven the car much yet.....maybe 2 miles so far. What is going to be my problem with this ????? It should still draft....air in the top, drawn out the bottom. Quote Link to comment Share on other sites More sharing options...
austinsailor Posted May 15, 2016 Report Share Posted May 15, 2016 My B1B has a little spring loaded flip cap to pour in oil, and a flexible tube that goes back under the cab for the vent, no screen. I guess it's an option to put fumes past the passengers? Quote Link to comment Share on other sites More sharing options...
dpollo Posted May 15, 2016 Report Share Posted May 15, 2016 I have heard the above referred to as Oklahoma Breathers a term from Dust Bowl times when rings were worn pretty badly but there was no money for repairs. Quote Link to comment Share on other sites More sharing options...
soth122003 Posted May 15, 2016 Report Share Posted May 15, 2016 Laynrubber, The problem with it facing forward is it will be a ram air induction of crap from the road and forced into the filter material by the fan. With it facing backwards you draft the air out by the fan blowing past it and creating a venturi effect. Joe 2 Quote Link to comment Share on other sites More sharing options...
laynrubber Posted July 13, 2017 Report Share Posted July 13, 2017 Dragging this post up from way back. So if the cap faces the firewall and the air past it vents like a venturi is the road draft tube the air inlet ? I thought the air went in the fill cap, through the engine and out the draft tube. I ask now because the car is now just getting back on the road. Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted July 13, 2017 Report Share Posted July 13, 2017 The flow is air enters the oil fill tube cap and exits through the road draft tube. The road draft tube creates a slight suction in the crankcase when the car is in motion. Quote Link to comment Share on other sites More sharing options...
TimFX Posted August 27, 2017 Report Share Posted August 27, 2017 So... if I wanted to top up the engine oil, I would remove the filter and pour into the tube? Quote Link to comment Share on other sites More sharing options...
_shel_ny Posted August 27, 2017 Report Share Posted August 27, 2017 16 minutes ago, TimFX said: So... if I wanted to top up the engine oil, I would remove the filter and pour into the tube? Either you add oil there, or try to get it in the dip stick tube 3 Quote Link to comment Share on other sites More sharing options...
Niel Hoback Posted August 27, 2017 Report Share Posted August 27, 2017 Tiny wee little funnel. Quote Link to comment Share on other sites More sharing options...
desoto1939 Posted August 28, 2017 Report Share Posted August 28, 2017 I have the oil cap that has the vents opening all the way around the circumference of the oil filler cap. So when someone is saying that the opening has to be facing the firewall for the aiflow to work correctly then I guess the factory option of having the type of oil cap filler is not engineered correctly but this was a MoPar option rich hartung Quote Link to comment Share on other sites More sharing options...
Andydodge Posted August 28, 2017 Report Share Posted August 28, 2017 Neil............I have a tiny little funnel for wee..........oops........wrong forum again...........yeh, I know I'm going back to my corner...............lol..............andyd 1 Quote Link to comment Share on other sites More sharing options...
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