head . ▁The ▁Walker - White head ▁car ▁was ▁the ▁only ▁factory ▁entry ▁to ▁finish , ▁the ▁other ▁two ▁ret iring ▁with ▁lack ▁of ▁oil ▁pressure . ▁A ▁priv ately ▁entered ▁X K 1 2 0 , ▁owned ▁by ▁Robert ▁Law rie , ▁co - dri ven ▁by ▁Ivan ▁W aller , ▁also ▁completed ▁the ▁race , ▁finishing ▁ 1 1 th . ▁ ▁In ▁ 1 9 5 2 , ▁J agu ar , ▁wor ried ▁by ▁a ▁report ▁about ▁the ▁speed ▁of ▁the ▁Mer cedes - B enz ▁ 3 0 0 SL s ▁that ▁would ▁run ▁at ▁Le ▁Mans , ▁modified ▁the ▁C - Type ’ s ▁aer od ynam ics ▁to ▁increase ▁the ▁top ▁speed . ▁However , ▁the ▁consequ ent ▁re arr ang ement ▁of ▁the ▁cool ing ▁system ▁made ▁the ▁cars ▁vulner able ▁to ▁over he ating , ▁and ▁all ▁three ▁retired ▁from ▁the ▁race . ▁The ▁Peter ▁White head - I an ▁Stewart ▁and ▁Tony ▁Rol t / D un can ▁Hamilton ▁cars ▁ble w ▁head ▁g ask ets , ▁and ▁the ▁St ir ling ▁M oss - Peter ▁Walker ▁car , ▁the ▁only ▁one ▁not ▁over he ating ▁having ▁had ▁a ▁full - s ized ▁radi ator ▁hurried ly ▁fitted , ▁lost ▁oil ▁pressure ▁after ▁a ▁mechanical ▁break age . ▁Test ing ▁by ▁Norman ▁D ew is ▁at ▁M I RA ▁after ▁the ▁race ▁proved ▁that ▁the ▁over he ating ▁was ▁caused ▁more ▁by ▁the ▁revis ions ▁to ▁the ▁cool ing ▁system ▁than ▁by ▁the