No the 1.5 most certainly has an overhead cam acting directly on the valve caps, exactly as the 1.9 XUD.jeremy wrote:The 1.5 is a different engine and I think operates its valves through rockers. The arrangement of the rockers could possibly cause the opposite effect.
The adjustment of the clearances is done with shims, also the same.
Hot starting problems on the 1.5TUD are not uncommon, and are often due to the clearances closing when hot. I didn't believe it when it was suggested for the problems I was having, but re-adjustment certainly cured the hot start problem, so I was convinced.
Oh, and the engine always started perfectly when cold.