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General Discussion Area / Re: Word Association.
« on: 19 September 2023, 19:02:23 »
Excuse me
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First things first, your attack requires me to justify my experience. I have owned several Omegas for approximately 250,000 miles of personal time with them combined, and almost all of the work on them in my ownership was done by me. These cars included 3 ex plod 3.2s, 2x 2.6s, 2x 2.2s, a 2.0 16v and a 3.2 Elite. Two of the ex plod cars had interiors replaced, OU54AEW had three different interiors fitted over time and extensive wiring and two significant panel replacements, not to mention the ongoing servicing/preventative maintenance required to pass an MoT/Council inspection every six months with no advisories over the course of 170k or so on that car alone. Not to mention two windscreens, one of which require three call backs to actually fit correctly. So whilst you might not agree with my approach sometimes, you can at least do me the courtesy of actually having some hands on experience with the Omega.
Right, back to the scuttle...Three out of three plod cars had incorrectly fitted screens and trims. And Two of these I was the first owner out of service, and both were under five years old. The issue is that the trims actually set the height of the screen in the aperture, fit the trims afterwards and the screen will invariably end up in the wrong position in any/all three planes.
The scuttle trim clips require the bottom trim to either be forced out of position or removed. The frame the trim sits in doesn't take kindly from being twisted away if the trim has been glued in (a bodge if the frames are reused, fitted in the wrong order or aftermarket ones fitted) or simply stuck from the culmination of dirt and time, as the force applied distorts the wafer thin steel clips where the lower frame connects to the side frames meaning that it will potentially never sit right again or repeatedly slide away from the base of the screen allowing water and dirt in under the scuttle. At a glance it may still appear correct.
The trim can also be stretched/distorted if removed forcibly. You may well be perfect and never damage so much as a piece of double sided tape when you work on your cars, but for all its apparent simplicity, removing and replacing the scuttle is easy to get wrong especially with the passage of time.
For the purposes of an as yet undiagnosed coolant leak removing the plenum instead of the scuttle affords much better access to the common leak points plus the opportunity to clean the breathers through and inspect the coolant system components under the inlet bridge. Especially as, if the HBV proves not to be the source, then the plenum is coming off regardless.
Cost will depend entirely on depth, area and type (density/composition/reinforcement). That said, if you're only talking a couple of square feet, it should be pretty diyable
You've clearly never owned an ex traffic car
The HBV will almost certainly have been replaced... it's practically a service item.
HBV isn't the only leak source that presents at the back of the block. It could also be the oil cooler or thermostat housing as both drain to the rear.
Does the rate of the leak change with the temperature settings on the climate panel... ie worse on Lo and better on Hi or vice versa if yes, then it's almost certainly the HBV. If no, then plenum and intake off and pressure test it... any leak will be self evident.
Unless you can guarantee the original screen and/or genuine trim/frame then removing the scuttle will lead to issues. This is partly down to collected dirt in the frame if poorly fitted of pattern frames are used together with the age of the seal trim*.
The frame and trim, including the lower strip, are fitted to the screen BEFORE it is fitted to the car and the screen assembly is then fitted AFTER the scuttle. It isn't designed to have the lower trim removed and refitted.
The only three jobs on the Omega that require removal of the scuttle are 1. Wiper motor replacement. 2 Brake servo replacement. 3. To allow proper preparation during screen replacement and then it's refitted before the screen to ensure correct screen placement.
Removing the plenum is
*Actually a misnomer as it seals nothing.
I also have their Performance impact wrench and with 1956 nm of 'nut busting' torque is up with the torque of the top Milwaukee wrenches, which only have a limited extended warranty. The quality is very good, and cheaper than Milwaukee. Come in at around £120- £130 ish. Worth considering.