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[terry paget]

You guys probably all know this, but yesterday a thought occurred to me.

Every Friday night I drive from Steventon Oxfordshire  to Somerset, have done so for 20 years. On wet nights my Omega often misfires as I round a certain roundabout in 4th gear as I leave Bath. Next day car is fine, so I do nothing about it.

The Senators did not do it.

I have recently learned on this forum that the scuttle join above the coil pack (PFL cars) is sealed when new, but, once disturbed, leaks. I reckon rain dribbles down on to the coil pack, allowing tracking between terminals and thus misfiring under load. Also the tracking could in time burn into the epoxy bodies of the coil packs, leading to eventual failure.

I have changed several coil packs, boring job. If I am right, this chore could be avoided by sealing the scuttle after every dismantling. I have already sealed scuttles on two cars, still four to go. Last night's car has not been done, and it misfired on the way home, hence my Damascean thought.

I invite your comments.

[Sir Tigger KC]

Yep Omega scuttles are the work of the Devil and must be resealed at the join and around the wiper spindles on refitting! 

I use ordinary clear silicone.  It's cheap and it works! 

[steve6367]

Yes known issue, I think I used the VX cam cover sealant on mine as I had Ito hand!

[chrisgixer]

Yep. Cam cover goo on drivers wiper spindle over pot 5 and around the metal lip to plastic scuttle on the scuttle drain directly above pot 6 on the pas side.

....especially on the 3.2 and 2.6 with coil pacs at £70-90 odd a side.

[biggriffin]

try this no need for silicone or sealent

[/img]

[05omegav6]

Having worked on a car with misfire issues and such a plate fitted, I'm not convinced ok said car has lpg fitted, and some of the wiring routing is less than ideal, but even in your pic you can see where the aircon plumbing is wearing a contact patch on the plate, presumably with a corresponding one on the vac pipe underneath

[biggriffin]

aircon pipe dosnt touch the vac pipe., have had no misfire issues on any of my v6's using this method.

[05omegav6]

aircon pipe dosnt touch the vac pipe., have had no misfire issues on any of my v6's using this method.

I'll wager the plate does... anywho, if it works for you, great

[Sir Tigger KC]

Cam cover goo for sealing your scuttle?!    You're a bunch of wealthy sods if you can afford to use it for that!!   

What is it? £6-7 for a small tube? 

[terry paget]

I find cam cover gasket sealant quite slow setting. It obviously seals well against oil, but I wonder if it seals as well against neat Opticlean (methyl alcohol?), which I use in the middle of winter.

[Andy B]

.....
I invite your comments.

The only thing I did to the scuttle when I had my Omega was remove the foam padding from the back .... amazing how much water it could hold ..... but other than that I fitted it un-siliconed/sealed in any way ...... there are rubber seals on the scuttle that should seal the wiper spindles.

[chrisgixer]

Cam cover goo for sealing your scuttle?!    You're a bunch of wealthy sods if you can afford to use it for that!!   

What is it? £6-7 for a small tube? 

I'd done my cc gaskets, and it was starting to set in the tube. .....and it was  all  I had  I'm that poor 

I don't know where you lot get your money with extra sealants kicking around AS WELL!

[chrisgixer]

But as you elude TG, any goo will do.

Biggriffin. I'd suggest stop drinking the local water. That ac tube is wearing through the plastic by the looks, without the rather flimsy plastic clips to hold the two appart THEY ALL wear through the vac pipe in the end ime.

Sorry, wrong tigger. I meant Sir Tigger.

[chrisgixer]

A good way to test this is to spray water on the screen with the bonnet up. Garden hose or waterting can. See if water gets in the engine bay. If not, happy days.

Another reason it leaks is when the windscreen seal becomes unclipped from the bottom of the screen. It looks seated correctly, but quite often isn't. So the water just runs off the screen straight into the engine bay.

[symes]

ingenious design again---lets put the coil pack somewhere that gets it drowned and takes half a stripped car to change---pure genius that