ZDDP additive to protect the Camshaft and tappets ARNAGE

[David Hill]

Well I researched......ZDDP is available to buy as an additive from many sources. The Hot rodder's in the US, who live and breath flat tappets couldn't live without it apparently because of the CAM profiles and loading. Where many consider it important for a new cam break-in, I can see no reason why a bottle cannot be added at oil change to up the level in modern oil. The recommended oil for these cars only has 1000ppm, where the original minimum for flat cams was 1300ppm. Specialist Oils in the US can be bought easily with concentrations of 2000ppm.

Too much is bad for a host of reasons including some negative oxidization properties,but more importantly if it can blow by the rings in an old smokey engine, and can then damage the CAT, but I am going to take that chance with my car, especially as if it can protect the CAM and tappets, a new CAT surely is much cheaper than an engine rebuild.

ZDDP will not repair any engine with damage, but it could go a long way to prevent further wear. ZDDP was an additive deliberatly added to oil to protect flat tappets, something we all have I believe. It forms a layer on the metal that effectively cushions and stops metal to metal contact.

I found an interesting manufacturers site that explains the technicalities of ZDDP use here www.zddplus.com. Maybe it is something those of us with
Arnage's that could be useful to use?


Comments please?

Regards

David