Date registered: Jun 2006
Vehicle: 1983 300SD (90K), 1985 300CDT (69K) brand new, 1970 250C, 1989 190D (45K) brand new
Location: Peoria, AZ
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Quick questions for you:
1) When you rebuilt the engine, did you find anything wrong with it (causes for issues you had before the rebuild)? Or any obvious failures, like head gasket, etc.?
2) Have you determined your leak coming from the manifold studs? Are they drilled into the water jacket?
3) The last post said there is still a small leak. Did you resolve the leak?
With the manifolds off, if you pressurize the cooling system, do you think you would see coolant coming out the manifold stud? Is it possible that is coming from the block, head or gasket due to a warp or crack?
I ask these questions because I have a 1970 250C that I am resurrecting from a 7 year nap. Mine runs fine but overheats simply idling. The overheating is in the back of the engine and the tail pipe for 4-5-6 is bright orange inside. After it gets warm and I shut it off, you can hear it boil for about 5 seconds between cylinders 5-6. I checked the compression and I get 165# on all cylinders. So I am guessing my leak is outside of the compression chamber. I don't have time this summer for a rebuild but would like to identify the cause now so I can plan accordingly. However, if I can resolve my overheating by removing the manifolds and checking the bolt, I would rather do that instead of a rebuild.