RWD3M
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Then you're not trying hard enough!ive never stripped any thread by over tightening it by hand
- Thread starter fizzy
- Start date
And then you get in the worry that I think Lotus tweaked the design, and reversed the usual mechanism of them self-tightening in use, so you have to fit them on opposite sides to what you might be used to.
ajlelectronics
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Ubique
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Well done - as much for finding that video!
Curiously, Audi (despite using the same wheel bolts as the rest of VWG) specify the wheel bolts shall be fitted 'wet' and with the same torque as 'dry' bolts fitted to the other VWG vehicles - not with copperslip or any other 'loaded' grease, there's a specific part number for the correct stuff, which has a very low viscosity, almost like clutch spline grease.
Merc. spark plug torque is 23Nm. and they 'shall not' be refitted once removed. In both cases, it's apparently to ensure the electrode is positioned so as not to block the spark from the mist of fuel - it is an issue that got worse the leaner engines had to be made to run.
Curiously, Audi (despite using the same wheel bolts as the rest of VWG) specify the wheel bolts shall be fitted 'wet' and with the same torque as 'dry' bolts fitted to the other VWG vehicles - not with copperslip or any other 'loaded' grease, there's a specific part number for the correct stuff, which has a very low viscosity, almost like clutch spline grease.
Merc. spark plug torque is 23Nm. and they 'shall not' be refitted once removed. In both cases, it's apparently to ensure the electrode is positioned so as not to block the spark from the mist of fuel - it is an issue that got worse the leaner engines had to be made to run.
Pete.
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That sounds incredibly hokey to me.
Talking of torque, Lidl middle aisle from Thursday:
www.lidl.co.uk
Parkside Digital Torque Adaptor - | Lidl UK
Parkside Digital Torque Adaptor - For digital display of the current torque Adjustable target torque value with audible and visual alarm Units of
JOEPRO
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Haven't heard of that one - what engine or model is that - link?
I think in general a spark plug with a crush ring should not be re -used maybe that's simply what the note means. I highly doubt the clocking of the spark plug is critical and repeatable.
8ob
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Ubique
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The starting point of the thread on the plug & cylinder head are referenced, so yes, with the correct torque, it's repeatable. I'll have a look on WIS next time i'm logged in - it's part of the training material at MK, even the 'filter-spinners' are told it (for good reason!) and IIRC it's across all models from the current century. I've had several misfires on E63's that were resolved by replacing the spark plugs fitted by Indies (using genuine parts) that had been 'horsed up tight' with replacement plugs to the correct torque.
brightspark
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keithski122
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Especially from mercedes who can't even get a decent non cracking vinyl for their seats.
premmington
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a load of crap to me
I have heard that real high powered Audi RS's can suffer misfires from over torqued sparkplugs.
I have never had a problem - but I don't work on too many high powered flagship vehicles - sparkplugs are another thing that gotta go in dry.
Only thing I lube now - are glowplugs with antiseize
premmington
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Mercedes-Benz Spark Plug Procedures and Precautions
This essential component is still evolving in design, materials and service. Use only genuine Mercedes-Benz spark plugs to avoid engine failure.
automotivetechinfo.com
premmington
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a load of crap to me
Sparkplug indexing is a real thing. See above
Ubique
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Thanks matey - saved me a job tomorrow!Mercedes-Benz Spark Plug Procedures and Precautions
This essential component is still evolving in design, materials and service. Use only genuine Mercedes-Benz spark plugs to avoid engine failure.
premmington
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You welcome "oldgit"
Ubique
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RS-whatever are 'sensitive souls' to all kind of things, along with Merc. A35/45's they are incredibly intolerant to 'standard' petrol - there's a suitable warning in the owners manual about it (along with an advisory of don't drink the starter battery contents...) The real prima-donna's are the R8's (and their finance payers) which need the plugs changing within a specific temperature range otherwise they will happily misfire until something melts.
keithski122
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After dealing with seized ford taper seat plugs I've always put a dab of copperslip on plugs.
premmington
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Ford 1.25 engines only ones I have had a problem with - I got box of thread inserts somewhere.
