What are they thinking ... two 10 mm wrenched bolts holding the power valves on?
How much can you tighten these bolts?
How much can you tighten these bolts?
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Power valves on 727 - 600
- Thread starter donbrown
- Start date
They are plenty as they see no pressure to speak of. Good and snug is plenty, don't have the manual in front of me but like 10-12 ft/#'s from memory.
Really, 2 - 10mm bolts???? Why does your sled have such big bolts for the exhaust valves? That's almost a 7/16" diameter bolt. My sled has 6mm diameter bolts, a little smaller than 5/16". Now I do use a 10mm wrench to tighten/loosen them.
I got you now. Really, that is ridiculous. I was thinking the 10mm wrench for the 6mm bolts on the stock cylinder. They must have machined it out to the size of the hollow dowel pin size? and using the large bolt to locate and hold it instead?
You are correct the wrench is 10mm
Just giving you some crap, I'm bored. Most will understand what you meant.
I was kidding with him, I knew what he meant.
Yes Staff Sargent !
This makes sense.
I have yet to ride it BUT it seems the oil blowby (based on the oil build up around the exhaust hose) is quite alot !
Is this common on a 727?
That would be Master Sergeant to you!!!
Oh sorry Master Sargent !
I was in the NAVY ... I learned PLAUSIBLE DENIABILITY ...
Are you sure the message had 10mm wrenched bolt or will the quotes get me busted?
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Sorry bud, the quotes don't change even though you edited the OP.
Yep, it's a common thing. I routed the vent line from the solenoid out of the engine compartment. Look for the hose sticking out by the front upper A-arm mount. The hole already existed, I just filed it out so the hose fits tight.
That sounds wrong you may want to check for a bad diaphragm. All the oil should be on the bottom side of the diaphragm. As I believe the 727 is based on the 600HO and it's solenoid actuated valves. So the hose should only have the vacuum from the intake tract working on when functioning correctly.
I believe you are sucking dirty oil and carbon out of the crankcase / cylinder and recycling it through to the intake side. Check the diaphragm for holes or rips or incorrect assembly that would allow this passage.
I believe you are sucking dirty oil and carbon out of the crankcase / cylinder and recycling it through to the intake side. Check the diaphragm for holes or rips or incorrect assembly that would allow this passage.
Unless the carbed version is different, there is no hose with vacuum to/from the intake track on the CFI models. The solenoid just allows venting to the atmosphere to keep the valves "closed/down". The ECU activates the solenoid to stop that venting so the small amount of exhaust pressure will push on the bellows thus lifting/opening the exhaust valves - this can vary from sled to sled, but it's some where around 7k RPM. The '02 600 RMK I had had NO hoses on the valves at all, the valves worked strictly from exhaust pressure and spring rates.
Don, if the mess is up front under the exhaust pipe, that's normal blow-by. If you have an oily mess on the exhaust valve housing, then you have a bad bellows and need to replace it - I recommend replacing both at the same time.
Okay, sorry for the last post. Most of my experience has been with the pre-CFI sleds, as the racers and carbed versions worked on vacuum from the intake side. I wonder why they chose to deviate from that? It was a cleaner on everything as I remember.
I have to step up for my fellow Master Sergeant (retired), that would be "Chief" for you Navy types.
Word on the flight line was that Sergeant was too hard for Navy guys to spell, so they used Chief for their top 3. Just a little service humour.... :face-icon-small-ton
I checked the bellows and they are not cracked and the oil is on the bottom (where it should be draining to)
Just seems like this thing leaks alot.
I took the drain line out of the solenoid and put it thru the melted front radiator delete cover till I figure out a better exit port.
So ... getting lots of oil out of the exhaust connections ... gonna check the amount of oil being delivered.
