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Old 11-07-09, 03:11 PM   #1
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Default Spark plug gap

Hi
Replacing plugs on 2004 2.0 16v petrol 407 sv
Old were DENSO K16HPR-U11- dealer supplied CHAMPION REC9MCLX, which looks correct according to the Champion pdf. Which doesn't give the gaps (varies between cars I expect).

Gap of old plugs was 1.0-1.1mm. New ones are supplied with 0.8, one at 0.7. Answer to a NGK post was 0.9, so I guess I'm not going to be far out anyway. At the moment I'm tempted to stay with the 0.8 as per 3 out of the 4 new plugs.

What is the correct gap?

For future reference, is this sort of info available on the web? I found out what to do from servicebox, guess you need to pay them to get anything really useful... suppose my trusty Haynes manuals with grubby pages are just going to be a sweet memory... thats a post for another day!
Regards -Phil
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Old 11-07-09, 08:30 PM   #2
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according to Autodata technical manual they should be champion REC9YCL @ 0.8mm, or Bosch FR8ME @ 0.9mm
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Last edited by 407mad; 11-07-09 at 08:55 PM.
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Old 11-07-09, 08:33 PM   #3
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neither the Denso or the champion plug they supplied you comes up in the autodata cd for any of the 407 petrol range
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Old 11-07-09, 10:37 PM   #4
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Lots of googling needed to get any sense on this one!

I was surprised to find that servicebox didn't have the answer, even with the 1hr subscription.

I have fitted the plugs with the 0.8 gap that 3 out of 4 came with, working OK so far. (Problem that started this was misfire with "depollution system faulty", the warning is still there even when the problem isn't, but I half expected that. There's another thread on the depollution warning, I'll post again once I am sure of the result)

Champion's (ie Federal Mogul) site indicates 0.9. It only shows OE178 for the 407

However "alwaysachampion.eu" lists OE178 with equivalent part no REC9MCLX (would put the urls here but I have less than 5 posts)

The plugs came in a Peugeot box. Perhaps the 0.8 gap is a Peugeot adjustment? One website suggested go with the existing gap, another said go with the vehicle manufacturer's spec (be even better if Peugeot told us what it is). So I'll go with 0.8, thanks for the help guys.
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Old 12-07-09, 05:14 AM   #5
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spark plugs are the most misunderstood component,

http://www.championsparkplugs.com/sp...nufacturerID=2

http://www.championsparkplugs.com/sparkplug411.asp

I was stuck on answering this because I had less than 5 posts now ive got more here are the links.
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Old 12-07-09, 10:10 AM   #6
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Thanks, amazing how something so "simple" can be so fiddly without the manuals. URL's to follow in next post.
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Old 13-07-09, 11:26 PM   #7
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As promised, might be of use to someone finding this thread on search:
Champion's website, gave plug gap:
http://www.fmecat.eu/section/Butt08/...349949771&NG=1

and the pdf that gave equivalent plug ref no:

http://www.alwaysachampion.eu/userfi...final%20UK.pdf
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