check engine light on- 98' 3.2 tl- egr--seafoam?
 

My check enginge light has been on for about 6 mo. I was told that it was a blocked egr valve. Just wondering if using seafoam would clean the valve by dumping it into brake booster hose or pcv. Also my tl has 165k on it and I heard that using seafoam on engines above 150k might cause problems. Any help would be much appriciated, dont want to spend 3-4 hundy to have mechanic clean intake and egr. I have thought about taking off intake and egr and cleaning myself but cant find and 98 tl diagrams or pics to help with.. thanks to all who respond...