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Lead free head
Posted: Tue Sep 22, 2020 6:39 pm
by lellyden
How can you tell the difference in a lead free head I've been sold one serpose to be lead free how can you tell. The valves have got 52 and 21 on them. Many thanks
Re: Lead free head
Posted: Tue Sep 22, 2020 6:43 pm
by King Kenny
The valve seats will be a different shade of grey than the rest of the head. When a head is converted the engineer will machine out the old valve seats and shrink fit new ones made from harder material thus preventing seat erosion.
Re: Lead free head
Posted: Tue Sep 22, 2020 6:51 pm
by lellyden
Would the valves still have 21 and 52 on them?
Re: Lead free head
Posted: Tue Sep 22, 2020 6:54 pm
by King Kenny
Quite possible. When I had my head done I got new valves but I could not tell you if they were standard or not. The problem with lead free fuel has been the erosion of the cast iron head seat rather than the valves.