Bingster Posted June 7, 2017 Report Posted June 7, 2017 I was removing the thermo housing bolts from my 47' flathead, for which I thank all of you for your advice, and noticed this fissure or crack or superficial casting flaw just under the driver's side thermo housing bolt to the left of the front freeze plug. Is my block history? Can it be welded? Quote
busycoupe Posted June 7, 2017 Report Posted June 7, 2017 Is this a recent crack? The car is 70 yrs old, if this crack was there from the factory you probably have nothing to worry about. I think that I would mark the end of it with a couple of punch marks, put it back together and see if it leaks. If it does not leak, let it be. Later you can check if it has grown by looking at th punch marks. Quote
Bingster Posted June 7, 2017 Author Report Posted June 7, 2017 Actually, the engine is in the car and fully together. I was in the process of flushing the cooling system before I tried to start it. The car was in pretty good condition when I bought seven years ago. It started, and the mechanic I bought it from said he did a compression test, etc. and it was okay. I haven't noticed this crack before, but then I wasn't looking. Quote
Dartgame Posted June 7, 2017 Report Posted June 7, 2017 Does not look like it has been leaking. If I understood your description this "crack" is on the head and not the block ? My guess is this is not an actual crack, but rather a casting mark perhaps ? Quote
Bingster Posted June 7, 2017 Author Report Posted June 7, 2017 No, it's on the block, driver's side front, near the freeze plug but not coming out of the freeze plug opening. Quote
Dartgame Posted June 7, 2017 Report Posted June 7, 2017 Hmm - well if it does not leak then I'd say good to go... Quote
Bingster Posted June 7, 2017 Author Report Posted June 7, 2017 Okay. I'll see after I put water in the radiator. How long would it take to leak? Quote
dpollo Posted June 7, 2017 Report Posted June 7, 2017 To my eye it looks like a superficial casting flaw. Leave it alone and don't worry. If it really bothers you a bit of JB weld would hide it from sight and prevent any leakage. 1 Quote
knuckleharley Posted June 7, 2017 Report Posted June 7, 2017 I agree with everyone else. It doesn't look like a crack to me. Quote
nonstop Posted June 8, 2017 Report Posted June 8, 2017 It sure looks superficial. I like the idea of the JB Weld if it bothers you. Quote
Don Coatney Posted June 8, 2017 Report Posted June 8, 2017 If it were indeed a crack there would be rust deposits surrounding the crack. Quote
Mortimer452 Posted June 8, 2017 Report Posted June 8, 2017 Agree with most others I think it's just an artifact leftover from casting, probably been there since the engine was new. Quote
Fernando Mendes Posted June 8, 2017 Report Posted June 8, 2017 12 hours ago, Don Coatney said: If it were indeed a crack there would be rust deposits surrounding the crack. It is a wise manner to know if it is a crack or no.Good idea. Quote
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