Show whole topic Jun 30, 2011 7:04 am
Peter S30 Offline
Member
Registered since: Nov 27, 2007
Location: Germany


Subject: Re: DB Lagonda spark plug caps
I ordered the two versions available from Holden, one is black modern plastik and has no resistor, the other is brown classical hard resin and has 5kOhm. Both have the SAE 6.3mm connector to the spark plug. The brown classical one is produced by Bremi in Germany, part no 10249N5, Bremi also have other versions

The black one is 21mm diameter and 70mm long and does not fit into the rubber cap
The brown one is 19mm diameter and 62mm long. I ground it down on lathe to 17mm diameter to fit into my rubber caps

I think new rubber caps, also available from Holden, might have solved the problem more easily, the inner diameter looks larger on the Holden homepage.

Some more usefull parts suppliers for the DB Lagonda:

gsparkplug.com have (cheaper than others):
  • contact breaker Lucas - DSB122C 407050 costs 6 GBP
    condensor DCB121C 407044 484261 489244, costs 7.50 GBP
    Voltage regulator RB106 12V Screw - Replaces NCB100 costs 22 GBP
    spark plug NGK C6HSA or C7HSA 1.6 GBP
all prices +VAT

distributordoctor.com:
have rotor arm and distributor cap, a bit more expensive than Holden but claim to have better quality, might be also a good address for other distributors (even V12) and repair

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