how to tell if I have 8:1 spark plugs or 7:1?

Landyfella · Jul 23, 2020

The plugs that came out are NGK bp5es.

thanks.

Mark Frewin · Jul 23, 2020

Hi These are for the 8.1 same as Champion N12Y. The 8.1 head has markings on it just next to the carb next to one of the cylinder head bolts a figure of eight.
7.1 uses Champion N8 or the NGK Bp6es this is according to land rover handbook

Landyfella · Jul 23, 2020

Thx. My head has 7h on it so must be 7:1?

Mark Frewin · Jul 23, 2020

In your second picture right next to 7H on the raised part just in front of the bolt head is a faint 8. Its large and sort of engraved. You have the 8:1 head so your plugs are correct

Blackburn · Jul 23, 2020

Maybe someone had the head skimmed to give 8:1.

Mark Frewin · Jul 23, 2020

I think the 7H is just a casting mark. The 8 is the same as my spare cylinder head. Pic attached

how to tell if I have 8:1 spark plugs or 7:1?

Landyfella

Active Member

Mark Frewin

Member

Landyfella

Active Member

Attachments

Mark Frewin

Member

Blackburn

Well-Known Member

Mark Frewin

Member

Similar threads