Hi Toby,
a good question,
I once asked that question at The Dealer in early days of working in the engine rebuild shop as an Apprentice and I was told it was because you can have loose soot, water and other crud in the exhaust pipe/manifold.
The exhaust system is basically unfiltered air that water can sometimes get down the pipe too and some of that crud would get drawn into and out of each cylinder via the dirty exhaust system, whereas utilizing the Inlet system the air transferred in and out of the cylinders would essentially be clean.
Or words to that effect.
Cheers,
Eddie B.
I think it’s obvious that moving filtered air in and out of the cylinders is preferable to the carbon and other crud that could be in the exhaust system. I’ll grant the point that the efficiency of sucking anything back in from the exhaust would be pretty low, but still possible for chunks to fall into the open valve and get stuck.
Hi Toby,
credit where it is due here, as I thought that Rome K/G had posted just before me (I saw his post after I posted mine above) about the Pony motor exhaust heat being circulated thru the Inlet system to help heat the main engine's combustion chambers etc.--he is correct for later engines fitted with the pony exhaust heater tube thru the Inlet manifold.
Cheers,
Eddie B.
HA! lol yea i thought maybe you guys thought my answer was out in left field!!! lol so i deleted it.
Hi Toby,
credit where it is due here, as I thought that Rome K/G had posted just before me (I saw his post after I posted mine above) about the Pony motor exhaust heat being circulated thru the Inlet system to help heat the main engine's combustion chambers etc.--he is correct for later engines fitted with the pony exhaust heater tube thru the Inlet manifold.
Cheers,
Eddie B.
I love your left field answers
This topic seems the most relevant to my issue, so I'll ask for advice here. I'm new to engine mechanics and I own D47U10608, from which I'm learning some of the D315 basics. My current problem is this: My compression release lever gets stuck in "run mode" (compression engaged) and will not return to "start mode" (compression released). What happens is this: The plunger does not plunge as intended, but rather, it rotates sideways a bit on its spring and locks up under pressure from the cam. When shifting in the opposite direction, from start mode to run mode, the plunger performs exactly as designed, riding smoothly on the cam as the cam presses downward on the plunger. My question is: Can somebody give me a bit of guidance here on how to remedy this problem?
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