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OMC recirculation system that is on v4 Crossflows.....what does it do, and what would happen if it was removed/plugged?
On my motor (V4 1980 Crossflow) i have 4 check valves (Plastic ones mot brass as the norm) they are on the intake manifold below each carb.
The check valves hoses lead to each by pass cover.
Are these needed ? i have read that they help idling but i will be fitting CCM reeds so can i do away with these ?
I have mine all pluged with a rubber cap on my motor and actually got some plugs for it as on one of my motors had the brass check valve and someone tried to solder it closed but it didnt completely plug it up. The threads are 1/4 pipe thread, you can get those plugs and do that to all of them as well. I think it was an EPA thing to try and drain extra oil/gas back into the motor to be burnt and not drip into the water.
Did you notice any issue with slow speed loading etc or doesn't apply to your usage?
Thanks RJ just the info i was looking for. Thats a good question FMP. Did the slow speed get effected ?
Never had a motor with them in use. I was told they were just for EPA regulations. Older crossflows do not have them at all.Quote:
Originally Posted by FMP
Anyone know what the UK equivalent is in BSP ?Quote:
Originally Posted by rjdubiel
Not an EPA thing.
What does it do?Quote:
Originally Posted by 71V153
makes them idle properly
In what way ?Quote:
Originally Posted by powerabout
If i add CCMS reeds will they not do the job better ?
its called the puddle drain system.
it is designed to drain ( pumped via one way valves) any fuel away that puddles after the reeds at low speed and feed it back into the engine in a manageable way.
It was changed over the years to make it work better.
OK i understand it now. I will have to look for two new plastic ones as two of mine dont work. May even have to bite the bullet and order 4 of the brass ones at £150 :(
Is this a cheap alternative ? I am struggling to find the plastic ones i already have
https://www.ebay.co.uk/itm/One-way-I...19.m1438.l2649
They open at Opening pressure: >0.015MPA
cheap enough to try.
Just see if they pump fuel when idling