Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: gordon on November 17, 2015, 21:23:41

Title: Cylinder head waterway corrosion
Post by: gordon on November 17, 2015, 21:23:41

Hi all, 1965 230 sl going through a complete rebuild. I have removed the cylinder head and i found that 1 of the large inserts in the waterways on the exhaust side is missing, another is loose [which i have removed together with 4 small ones on the other side also affected by corrosion and almost closed up.]

Because the corrosion to each of the holes has removed the little dimple which locates the new ali inserts the correct way round i wonder if anyone has a picture of a non corroded head so that the weld repair will locate them correctly. Thankyou,Gordon

Title: Re: Cylinder head waterway corrosion
Post by: Benz Dr. on November 18, 2015, 01:26:55

Generally speaking, I believe the ports on the water inserts should point towards the valve seat areas deep inside the head.

Title: Re: Cylinder head waterway corrosion
Post by: gordon on November 18, 2015, 17:20:58

Thankyou Benz Dr,   do the new inserts come with the distorted top edge or is this formed by knocking the edge of the new inserts into a preformed recess?  Thankyou, Gordon

Title: Re: Cylinder head waterway corrosion
Post by: Benz Dr. on November 18, 2015, 19:00:28

I think they have that small notch built into the top rim.

Title: Re: Cylinder head waterway corrosion
Post by: gordon on November 19, 2015, 20:20:39

So i just need to establish which direction the holes in the inserts face.[some have 1 hole in them and some with 2]  Machine shop checked the weights of the new Mercedes pistons prior to balancing the crank and found almost 7 grams difference between heaviest and lightest