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Veteran
Location: Kingsley Michigan | As you probably have guessed by now--ole 801 is getting some major work done to it including a new (rebuilt) engine. You know, it's odd that someone put 1978 motor in my 1975 coach---and the millage only says 103,000. Also found, in the undertaking, that the newer motor had already had it's crank ground .010" under and that the valve stems on one side were smaller than the ones on the other side---What a story this coach would say if it could talk--
Now for the question---under the carb on the primary side only---sandwiched between the thick gaskets are 2 brass cups, about and 1" deep, that have screens in the bottom of them. Sitting on top of these screens are propellers. What was the purpose of those devices?
Thanks to all the wisdow that assists and conjoules-----------
Barn |
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Veteran
Location: Illinois |
Barn -
Your coach probably had engine trouble in transport. Many were blown then and several had trouble early on in their life.
These brass devices were some fools attempt to gain fuel mileage. Most of these type devices only adjust the sellers cash flow.
Also, be sure to make both heads symmetric for proper performance. Use only premium cylindrical valve seals as the original umbrella valve seals will allow oil down the valve stems creating problems after a short time.
HAPPY TRAILS - Leslie Hoagland - FMC #0938 |
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Veteran
Location: Kingsley Michigan | Thanks Les-
When you said that the engine might of had trouble ---I agree as to why they had put a newer 78 motor in the 75 coach. That doesn't bother me. What bothers me was the rest of your saying that they had a lot of them do that. Was there a design or sizing error? Did FMC not get a good batch of Chyslers? Was there so other reason for this?---Now--you got me worried! Please tell me of any more pitfalls before I put this baby back in!!!!
In talking with my shop that is doing the motor--which by the way-- replaced all of the valve guides, seals, valves, springs, exhaust manifold studs and put in new hardened exhaust seats---all with top of the line stuff---they also had to face the heads with a clean up cut as there were some fairly deep gouges in the one head (drivers side-probably from doing the install without removing the motor is my guess) so the shop made the cc's match as well.
As far as the propellers in the intake went---the engine man found them well made and cute---so I gave him on and kept one for conversation----He felt that they were some gimmick that might have been sold to "Better atomize the gas" deal. What they did do was allow the primaries not to seal to the secondaries----no wonder I couldn't get the Idle jets to respond properly--------
Thanks----Barn |
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Veteran
Location: Illinois |
Barn -
As for the engine problems - they had less than desireable people driving them back across the country from Santa Clara, California.
They actually destroyed the engines in route or heated same due to not paying attention.
The engines were not the problem but those that transported the coaches should have been more knowledgeable.
The engine heating problem was in all the coaches even my FMC #0938 would easily go to 230 degrees Farenheit when it was NEW. I eliminated that problem immediately by effecting the solution to the setup. Many engine builders will tell you that 230 or 250 degrees Farenheait is not a problem as longas you have a 13 or 16 psi radiator cap.
BUT why allow the higher coolant temperature and pressure if you can make the engine operate at 180 to 210 degrees Farenheit with a 7 psi Radiator Cap???
When we rebuild the I440, we use cast rings and pistons oversize 0.030, cylindrical valve seals, and Low RPM Camshaft. We keep the tolerances to the minimum to provide maximum effect.
The I440 is a great gasoline powered engine when sized properly and the cam and valve seals are changed as noted.
Also, use a good diesel quality oil in your I440 engine, like 15W40 Chevron Delo 400 or Mobil Delvac. This type of oil will provide good lubrication plus not allow oil vaporization.
That is why we, at MCR, have the knowledge to change the eleven points that allow the coach to run over 100 MPH on a day in excess of 100 degrees Farenheit without excessive coolant temperature.
Be sure to check you engine accordingly and you will have no problem. We have had some FMC Coaches go in excess of 150,000 miles before oil consumption becomes problematic.
HAPPY TRAILS - Leslie Hoagland FMC #0938 |
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Veteran
Location: Kingsley Michigan | Yep----All of what you say is true about the overheating---coolant temp and all. The new cars today are made to run that high heat only to satisfy the EPA standards not the MPG. Ole 801 got a nice new lifters and low torque cam---was almost tempted with roller cam but didn't--
Can't wait to get her broke in and rolling strong-----Barn |
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Carb Base Gasket