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Author Topic: The invisible Omega  (Read 4618 times)

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VXL V6

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Re: The invisible Omega
« Reply #45 on: 24 July 2022, 22:59:49 »


That lead me back to the pipe running to the brake servo, and it wasn't until I moved a random clip that it became obvious. I guess that clip's to stop two hoses rubbing - but the irony was the clip seemed to have rubbed through one of the hoses itself.  >:(





With this (giant) hole patched up, I was now getting a consistent 22 in/Hg reading and it seemed like the hissing snakes had been banished from the garage  :y

The brake servo pipe usually wears through in that position because if the spacer clip isn't fitted the pipe rubs against the aircon pipe.  :y
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Stu.C

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Re: The invisible Omega
« Reply #46 on: 24 July 2022, 23:15:23 »

Whilst doing all the leak hunting, I also noticed that the front multiram wasn't moving at all. It sits at the top of the front intake pipes, and is supposed to open above 3,400 RPM. I checked the vacuum valve itself with 12V on the bench and that was fine. The valve is fed vacuum from the reservoir tank at the back of the bagpipes, along the white hose you see. When the ECU opens the valve, the vacuum pulls the solenoid arm in, which then rotates the spring-loaded cam of the multiram valve and opens it. Except it didn't budge.


Lots of squirts of spray degreaser and manual moving of the cam arm soon freed it up though. I guess it dried up and the spring stiffened over the years. May be an idea to check yours - if you've got this far  :y  Gave it a quick squirt of silicone grease and it's now merrily rocking back and forth when I tweak the throttle.  :)



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dave the builder

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Re: The invisible Omega
« Reply #47 on: 25 July 2022, 09:20:33 »

A very interesting read  :)
Not sure how true it is ,BUT ...
I heard silicone contaminates the Lambdas ,not sure how much silicone is in silicone grease  :-\
but i thought i'd mention it ,just in case there's any truth in it .
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Stu.C

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Re: The invisible Omega
« Reply #48 on: 25 July 2022, 10:10:21 »

I heard silicone contaminates the Lambdas ,not sure how much silicone is in silicone grease  :-\
but i thought i'd mention it ,just in case there's any truth in it .


Well, hopefully not a problem either way Dave. In truth, it's only a wee squirt on the spring that's on the outside of the multiram valve unit, so nothing should have gone into the intake itself. Time will tell I guess...
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MikeV6

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Re: The invisible Omega
« Reply #49 on: 22 September 2022, 11:43:22 »

Fantastic work Stu.
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Stu.C

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Re: The invisible Omega
« Reply #50 on: 22 September 2022, 20:06:55 »

Fantastic work Stu.


Thanks Mike  :y


The story will surely pick up once more - when I've finished rebuilding the garage, at least ...  :o
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