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Astra mk3 Arctic 1.6 8v to 3.0 24v build

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  • Originally posted by DarrenH View Post
    what are those pebbles all about !!
    Ask Highways England or whoever thought it would be a good idea to litrally stick them to a road surface. They were everywhere & I got a fist full out the side skirts when we got home. Found them all over the GTE as I drove it down that year unfortunately
    My GTE diary and the mk3 Arctic 3.0 V6 diary.


    • Dug the Astra mk3 from its hibernation and gave it the once over in readiness for going back on the road next month.

      Just to prove my custom made dash and the engine work I did a little vid. Can’t wait to actually drive it again as it’s been way too long, that is if I can get the keys off the wife as it is her car after all.

      Last edited by Harvey; 23-04-2021, 06:04 PM.
      My GTE diary and the mk3 Arctic 3.0 V6 diary.


      • Finally, the mk3 is taxed and on the road now the weather has turned for the better, that was until it wasn’t last Sunday. Decided to pop into Derbyshire and the heavens opened but fear not it’s a car to use, until it isn’t and I found the front o/s brake caliper was sticking

        You see it does get used in the rain. This wet stuff is from the sky and not a hosepipe!

        Lovely beading on the roof.

        The V6 rear bank 1 lambda popped the EML on a couple of times so I’ve cleared the codes and not seen it since. Got a spare brand-new Bosch on the shelf just in case I need to swap it out.

        On Monday evening the car resumed default position, on axle stands.

        I removed and stripped both front calipers as there’s simply no point servicing just one for such a safety critical component. I had to use a punch through the brake line hole to get the piston out of the o/s caliper, it was tight. The n/s wasn’t so bad but was close to sticking.

        Non-patented anti-drip braided line tool installed, old silicone sealer kept knowing it would come in handy one day for something.

        Piston cleaned up well with no pitting.

        Issue was the section between the inner and out seals had corroded even though the outer seal wasn’t damaged. I blame this on me assembling them last time using just brake fluid possibly causing it to dry out with moisture trapped, lesson learnt silicone grease assembly method only from here on.

        Cleaned up the corrosion with my trusty Dremel and without seals in place the piston dropped in/out smoothly as it should.

        Alfresco dining with a dirty mk3 anyone?

        Last edited by Harvey; 10-06-2021, 09:47 AM.
        My GTE diary and the mk3 Arctic 3.0 V6 diary.


        • Seal kit ordered along with new banjo crush. Seal kit was from Brake Stop Lid and is excellent quality and comes with silicone piston seal assembly grease and red rubber grease for the caliper body sliders. Everything ordered Monday and arrived yesterday.

          Assembly time using only the silicone grease for the seals and a good smearing around the now not rusty section. Inner wiper seal in place.

          Outer weather seal stretched over the piston.

          Weather seal located in the groove and gently but firmly pushed into place passed the inner seal before finally making sure the seal locates in the outer piston groove.

          Refitted and bled the brakes using my wonderful assistant (the wife) as it was quicker than messing with Eezibleed.

          Test drive success and car washed.

          Then back to bed until next use.

          My GTE diary and the mk3 Arctic 3.0 V6 diary.


          • I’ve managed to acquire a couple of perfect mk3 top mount caps from a mate as my existing ones were drilled to accommodate the mk2 Koni top adjusters which are no longer fitted (leaking) having changed to the mk3 Koni.

            Looks neater instead of having holes drilled unnecessarily.

            My GTE diary and the mk3 Arctic 3.0 V6 diary.


            • As the car is running my hybrid mk2/mk3 LCD dash I’ve finally got a fully working oil pressure gauge after messing with a few different sensors both new and used, all faulty for various reasons. In the end a brand new Intermotor 53850 sensor with adaptor loom so no cutting of the OE loom plug necessary works perfectly. The sensor offers 2x oil pressure feeds; 0-5 bar variable gauge, plus 0.30 bar oil warning light. Most Vauxhalls only come fitted with an oil warning light sensor and not the dual sensor that I have fitted for the LCD dash.

              While on a fix it mission I had noted the ambient air temp was reading a tad high on the trip computer so rummaged through my spares stash and found three GM temp sensors. One being faulty so got binned and the other two working perfectly and giving a proper ambient temp. Turns out I was right as the originally was ready 5C high all the time, so also got binned.

              My GTE diary and the mk3 Arctic 3.0 V6 diary.


              • I thought it was about time I had the AC health checked on the mk3 as it was last done early 2017. It’s still working fine but didn’t seem to be as cold as it should be so I booked in with Stay Kool who are home based in the South Derby area. I arrived at my allotted time & Mark set about connecting his kit. We had a chat about the total gas weight & after double checking his documentation it was as I initially thought & should be 900g for the series 2 mk3. Pressure test passed & old gas removed it only had 360g left, no wonder it was cool & not cold. Re-gassed with dye added just in case any future leaks developed & I was on my way happy & cold in the knowledge the AC was in tip top condition.

                My GTE diary and the mk3 Arctic 3.0 V6 diary.


                • I found a crack in the intermediate drive shaft bearing support bracket last year and applied a temporary fix until I could source a replacement, more on that later. After a Sunday only attendance at VBOA the other week I obtained a bargain replacement within the depths of the trade stands for a whole ?10, winning! Here it is with the support bracket removed.

                  I only required the alloy bracket but the drive shaft was decent & noted the bearings sounded dry. I thought to myself “I wonder?” then began pulling it apart to investigate.

                  Outer orange and inner black muck/dust seals removed.

                  Bearings found to be a perfect but dry condition.

                  Repacked with LM2 grease prior to reassembly.

                  The temporary fix on the left as the bolt wouldn’t tighten fully in the bracket thread and just span. You can see the crack in the bracket which was caused by the starter motor hitting as it attempted to make a break for freedom when the bolts worked loose, eek. Replacement on the right tested and full torque of 18Nm is achievable.

                  Part number for the alloy bracket is 90375925 which is used on Calibra/Cavalier C25XE/X25XE as well as Vectra B X25XE/Y26XE. Even the date stamp of 96 matched both brackets, spooky.

                  Replacement ready for fitting. Old bracket gone but keeping the old shaft as it makes a sturdy hitting stick. The 23mm spacers are due to the V6 being narrower than a 4 pot when using an F28 gearbox.

                  Jacked the Astra mk3 up from the drivers side and lost no gearbox fluid during the swap over. Pictured from underside looking up with rag on left to catch any drips but nothing came out.

                  While I was poking around, I fixed the rear end clunk that was occasionally heard on very bumper roads. Turned out to be the exhaust kissing the beam so a permanent fix was applied using a length of thick wall fuel hose slit down its length.

                  My GTE diary and the mk3 Arctic 3.0 V6 diary.