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Topic Starter Message  Anyone run an 4.2sc on LPG here? friskydog 30th Mar 2025 10:39pm Forum: LPG · Replies: 14 · Views: 10911 · Subject: Anyone run an 4.2sc on LPG here? I run LPG after a rebuild I had done where I took all valve clearances when fixed.... Now its 25,000 miles later on LPG and I am taking the gas out as its seeing large VSR Valve Seat Recession. Ple ...  4.2 supercharged misfire on idle friskydog 30th Mar 2025 8:57pm Forum: Technical (L322) · Replies: 54 · Views: 15966 · Subject: 4.2 supercharged misfire on idle Hi Dingg1 Very interesting. I have updated picture so hopefully you can see table of info. I drove mine very carefully on LPG and if I wanted to give her some life I'd switch to petrol before g ...  4.2 supercharged misfire on idle friskydog 29th Mar 2025 11:44pm Forum: Technical (L322) · Replies: 54 · Views: 15966 · Subject: 4.2 supercharged misfire on idle Yes I did. I had it re-shimmed. Now its 25,000 miles late on LPG and I am taking the gas out as its seeing large VSR Valve Seat Recession. Please see link and picture below. Hope you find it ...  L322 2007 4.2 SC Timing Chain & Valve advice friskydog 25th Mar 2025 11:43pm Forum: Technical (L322) · Replies: 35 · Views: 9650 · Subject: L322 2007 4.2 SC Timing Chain & Valve advice So 25,000 miles later after shim/bucket engine rebuild on LPG on my Range Rover 4.2L L322 2007 Supercharged we have measured Valve Seat Recession. I have also completed a compression test to check pis ...  4.2 SC knocking and misfire on #5 friskydog 9th Mar 2025 11:48pm Forum: Technical (L322) · Replies: 4 · Views: 1323 · Subject: 4.2 SC knocking and misfire on #5 If you have a knocking with a misfire it could be causing the coupler to be noisey in the snout of the Supercharger. Sort the misfire and it should sort the knock ur hearing.  L322 2007 4.2 SC Timing Chain & Valve advice friskydog 9th Mar 2025 11:42pm Forum: Technical (L322) · Replies: 35 · Views: 9650 · Subject: L322 2007 4.2 SC Timing Chain & Valve advice I had to take the rebuilders to court and got most of my money back. I got all the clearances sorted elsewhere and she has run great since.  4.2 supercharged misfire on idle friskydog 28th Apr 2022 8:04am Forum: Technical (L322) · Replies: 54 · Views: 15966 · Subject: 4.2 supercharged misfire on idle So to update a settlement has been agreed out of court and I need a new company to bring valve clearances back into tolerance. Anyone know a reputable place in the Birmingham area?  4.2 supercharged misfire on idle friskydog 6th Mar 2022 10:57pm Forum: Technical (L322) · Replies: 54 · Views: 15966 · Subject: 4.2 supercharged misfire on idle Great url with lpg forum I will completely read soon. But sounds very very similar to my issue initially. Mine was 5k to do the engine rebuild. I had even sent them the valve clearances pre rebuild to ...  4.2 supercharged misfire on idle friskydog 6th Mar 2022 10:27pm Forum: Technical (L322) · Replies: 54 · Views: 15966 · Subject: 4.2 supercharged misfire on idle The rebuilders said compression was fine after the rebuild as it's one of the tests they check after. However after requesting said data they seem to have misplaced the testing data somehow. Inter ...  4.2 supercharged misfire on idle friskydog 6th Mar 2022 9:53pm Forum: Technical (L322) · Replies: 54 · Views: 15966 · Subject: 4.2 supercharged misfire on idle Could these misfires be caused by valve clearances being way out of tolerance?  4.2 supercharged misfire on idle friskydog 6th Mar 2022 9:51pm Forum: Technical (L322) · Replies: 54 · Views: 15966 · Subject: 4.2 supercharged misfire on idle https://www.fullfatrr.com/gallery/albums/userpics/19655/normal_Screenshot%202022-03-06%2020.49.36~0.png They only relapped the valves so dont believe any bucket or shim changes were made. Please ...  4.4 Jag and SC owners on LPG friskydog 6th Mar 2022 9:34pm Forum: LPG · Replies: 45 · Views: 30975 · Subject: 4.4 Jag and SC owners on LPG This is the table I used for my clearances on my AJV8 4.2 2007 SC L322. It may help. Recommendations for clearances according to LR documents. INLET Clearance = 0.18 - 0.22 EXHAUST Clearance ...  4.2 supercharged misfire on idle friskydog 5th Mar 2022 11:42am Forum: Technical (L322) · Replies: 54 · Views: 15966 · Subject: 4.2 supercharged misfire on idle Yes but they won't offer a resolution to valve clearances. I tried swapping plugs over and coil packs but still the same so surely its internals. So I will update when I have more info.  4.2 supercharged misfire on idle friskydog 4th Mar 2022 5:27pm Forum: Technical (L322) · Replies: 54 · Views: 15966 · Subject: 4.2 supercharged misfire on idle So misfires only on 1357 on one bank now after sorting air leaks on engine. However I have had it confirmed the valve clearance is further out of tolerance after engine rebuild. So also have had troub ...  L322 2007 4.2 SC Timing Chain & Valve advice friskydog 22nd Dec 2021 2:38am Forum: Technical (L322) · Replies: 35 · Views: 9650 · Subject: L322 2007 4.2 SC Timing Chain & Valve advice So I sent the car back to the rebuilders and they then gave me the car back still with air leaks, misfires and shorter clearances between the tappet and the cam shaft lobes. How after a rebuild wo ...

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