Petrol engines aircooled spark plugs
kev the rev
Usual recommended plugs
Spark plugs Bosch W8CC
Electrode gap .6mm
Forum Discussion
Gunslinger: Just had this useful info and plugs seem reasonable price too:
Hi Stuart,
The W8CC is the correct plug for your van. The W7CC is a colder plug which you would probably use if you were towing a caravan or something etc
Tom Green The Green Spark Plug Co
Plugs - heat-range choice
The general rule for plugs is to use the hardest (coldest running) plug, that doesn't oil up or cause poor idling/misfiring - for the conditions of use.
That's the safest.
Idling doesn't matter for a race engine, once started warmed and under way its as cold as allows good pickup from slow sections - this would in the past involve starting on warmer plugs and then changing to a race plug - an extreme example.
For road use, typical load as well as ambient temperatures and engine condition determine what can be tolerated.
Poor cooling, hot intake air or retarded ingition all point to a softer plug overheating, and use of the harder choice
An engine in poor condition, with bad rings, valve seats and low compression can give more oiling, misfiring and idling problems with a harder (colder) plug.
In this case we have two choices which I imagine are quite close together...
In other words a good condition, high compression, clean running engine should easily tolerate the harder choice, and give more confidence in pushing on when everything gets a bit hot. If it's burning a bit of oil and is not spot on, the warmer plug might be the one.
Only you can know, if in fact it matters much, which in general obviously doesn't due to the two recommendations being fairly randomly made...
[HM]
81Aircooled: Has anyone got a part number for the HT leads? I think it might be 998 031 021 but I'm not sure if they are for Beetle only.
Paul66beetle: Original Part No: 905QHT016 lInk to Just Kampers http://www.justkampers.com/shop/type_2_bay/type-2-bay-original-vehicle-parts/ignition-systems/plugs-leads/ignition-lead-set-j10204-905qht016.html
