slight glitch at Canberra 2018 event

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hands_aus
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slight glitch at Canberra 2018 event

Post by hands_aus » Sat 06 Oct, 2018 11:06 am

After driving my 1967 250SL from Brisbane to Canberra and surrounds without a problem, on the Sunday of the All German Day
when I decided to leave, I made a wrong assumption that since it had been a beautiful clear skies day at about 28C, my cars' engine would be hot.
Under that wrong assumption I treated the start as a 'hot engine' and put my foot on the accelerator pedal and consequently flooded the engine.
Eventually it started but became fussy each time I tried to hot start it.
At the hotel I sat around considering my actions and decided that my plugs must be carboned up badly.
Next morning I checked all the usuals.... oil level, injection pump oil level, radiator level, battery voltage before removing and cleaning
the very sootty Bosch W7DC plugs with the only thing I had with me....a plastic denture brush.
The car never missed a beat on the return journey.
Not bad for a 52yo car.

TRIP STATS
TOTAL MILES 1652
AV IMP MPG 22.6 (after inj pump rebuild in September 2014)
Bob Smith
Brisbane

1967 'early' 250SL, auto, PS

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T-Modell
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Re: slight glitch at Canberra 2018 event

Post by T-Modell » Sat 06 Oct, 2018 3:33 pm

Hi Bob,

glad it turned out well. As I have a "similar" car, 1967 250SE/C, I was surprised too about fuel consumption after the pump rebuild. Before that, on the Autobahn, the fuel consumption was around 13.5 to 14.5 litres/100km (in the enemy countries of Europe we measure this way :laughing6: ); after that I could do that with 12 litres/100km. Yours equals 10.4, which imho is an excellent value. If you optimise a bit more, you might get a refund at the fuel station :laughing6:

Best regards
Thomas
---------------------------------------------------------------
1967 W111 250SE Cabriolet, horizon blue
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John Green
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Re: slight glitch at Canberra 2018 event

Post by John Green » Sun 07 Oct, 2018 7:03 pm

hands_aus wrote:
Sat 06 Oct, 2018 11:06 am
After driving my 1967 250SL from Brisbane to Canberra and surrounds without a problem, on the Sunday of the All German Day
the very sootty Bosch W7DC plugs with the only thing I had with me....a plastic denture brush.
Are you sue they are W7DC plugs? Bosch stopped production of these a long time ago, when they changed over to resisted plugs. The conversion was WR7DC with the R being for "resistor".

We started using WR9DC plugs as we had less trouble with fowling as they were a hotter plug, more recently we have changed over to NGK plugs as they still offer a plug that is not a resistor plug. It was kind of a sad moment for me, as I have always liked to use OE products. We are now using NGK BP5ES, which is still hotter than what MB specify, but we are not having any issues with detonation or otherwise.
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Re: slight glitch at Canberra 2018 event

Post by CraigB » Sun 07 Oct, 2018 8:16 pm

That's interesting John, I had been running BP6es as the recommended plug for the pagoda and 560 etc (except the AMG), but particularly on the pagoda that gets a few start ups to move out the way and back in again (due to the Amilcar being crammed in a hole behind it), i have had fouling. It does have a small amount of smoke until it warms up, but then none, so maybe some adjustment in the cold start set up could be in order, but generally it doesn't last long and then warm and no prob so for fear of upsetting something i have let sleeping dogs lie. I would think the combined experiment between you and your customer cars that running the 5's will be a good idea. Funny timing, just ordered some bp6es from supercheap today with their 20% off today sale - wonder if that is a 24hr thing, might go back and order some 5s....... still got plenty of use for the 6's.

And is that the same in Kjet 450 and 500/560?
Craig Baulderstone
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hands_aus
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Re: slight glitch at Canberra 2018 event

Post by hands_aus » Wed 10 Oct, 2018 7:40 am

Hey Thomas,
Thanks for the reply.
I too was delighted with the fuel economy and given the cost per litre in Australia atm a refund would be most acceptable.

Hey John,
The plugs are W7DC Bosch.
A few years ago I was in the local Supercheap Auto store and saw the W7DC plugs marked down to $7.00 a set so I bought 6 sets knowing full well in the future I would use them.
I have one new set left.
Eventually I will have to use the NGK BP6ES.

Hey Craig,
good to see you still have the Pagoda
Bob Smith
Brisbane

1967 'early' 250SL, auto, PS

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Re: slight glitch at Canberra 2018 event

Post by CraigB » Wed 10 Oct, 2018 10:32 am

Thanks Bob. Sorry to have not been there and caught up. You may have picked up that i had a stroke end of June and while I am pretty much back to normal, not quite ready for such a long drive! Maybe next year - event looked great.
Craig Baulderstone
Lurch
280s's
280SE3.5
280SL
350SL
500SEC's
560SEL's

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