VR6 spark plug gaps

[Crozo 0]

Hello could anyone tell me what to set my spark plug gaps at pleas? :?

[mr.ots 10]

0.7 - 0.8 mm

[Crozo 0]

BIG thanks :D

[RW1 0]

Coil pack plugs are specifically 0.7mm and dizzy are 0.7 - 0.8mm.

 

They don't get "gapped" at any time during their life useage. The plugs are preset when supplied and are past their best at 15,000 miles but should stretch to 20,000 just (slight misfires start to become a little more noticable between 15,000 & 20,000 miles but it usually isn't anything to write home about). The 20,000 mile service changes them out for the standard plug as original factory supplied. The longer life ones now available go on to about 40,000 miles. Some peeps find these don't work as well in the Corrado VR6 engine as they were really for post 1995 VR6 & V6 engines. Takes u're choice.

 

The plug technology doesn't follow convenential plug knowledge. The plugs use "half surface ignition", arcing takes place from the insulator tip to both the earth electrodes so that soot deposits are burnt off the insulator tip. This leads to the underside of the earth electrodes taking the spark hit, ie. the face not visible when the plug is viewed end on from the elctrode end.

 

In the coil pack version, the spark occurs about 30 times on each power stroke (and is ****** painfull if it gets you!).

 

The wear is not across the gap looking into the plug end (very hard to gap a curve anyway), instead what happens is that the underside of the earth electrodes near the insulator wears. So look at the plug from the side profile. If the electrode has worn by a third of it's full thickness on the under side, then replace the plugs.

 

If you are gapping due to getting an electrode bent while the plug was out of the engine. Re-gap by commaprison with a known good plug and find a feeler gauge size that fits and cross transfer this setting. Personally I would put a new plug in until the next service if there is some mileage to go.

 

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[Crozo 0]

thanks for all the info mate :D