| lazy69ranch | -- 09-06-2014 @ 12:43 PM |
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221 V8 21 stud 1935 5 window coupe: Found dried coolant on the passenger side head and discovered this crack running between the plugs after wiping it down. Prior to this, I had an oil leak between the head and the block and so I checked the torque at 40 ft lbs using the suggested torque pattern. Only one nut was less than 40 ft lbs and it was right at the bottom front where the leak was. The oil leak stopped and now I can't help but think the crack had something to do with my maintenance. Engine was not over heated above 200 F in between maintenance and discovery of crack. Is this a common age related failure? I'd appreciate any suggestions on where to find another head. And looking for range of compatible years - 33-36? I see a member has a set of 34 heads that may be cast iron. Any reason I can't convert to 34 cast iron heads? Dan This message was edited by lazy69ranch on 9-6-14 @ 1:15 PM
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| David J | -- 09-06-2014 @ 2:52 PM |
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The 34 cast heads will work fine . Your head has 40- on and that means flattop pistons and make sure the replacement are 40- also . 48- or 68- are for domed pistons . FWIW the head you have there is pretty common if you want to look for a single replacement . The early 33-34 heads are not so common . IMHO yours is toast !!!!!!! .
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| chas34 | -- 09-07-2014 @ 6:34 AM |
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That crack can come from a warped head that is installed and the torque sequence will put the strain over the center of the warp ... obviously not resurfaced before installation ... learned from experience from my left head ... I purchased a new set of aluminum Kearney Heads (that are very expensive) so do have the GOOD right side head available if you are interested ... where are you located (for shipping purposes) ... chas34
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| lazy69ranch | -- 09-07-2014 @ 3:04 PM |
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Chas34 -I'm in 96084 zip code. Would you happen to have a photo of the right side head handy? Just want to see how much different it would look compared to the other side. And do you know if it is intended for flat or domed pistons, compression ratio, etc? Dan This message was edited by lazy69ranch on 9-7-14 @ 3:05 PM
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| supereal | -- 09-09-2014 @ 12:22 PM |
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The aluminum heads are now being reproduced in modern alloy, but are expensive, at about $400 each. In any case, I'd replace all the studs. Be sure to seal them on the block end. If you want to preserve the look, strip and paint the iron heads with aluminum paint. Any used heads should be taken to a good machine shop to have them resurfaced.
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| chas34 | -- 09-15-2014 @ 6:00 PM |
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Here are pictures of the 34 - 35 aluminum head (passenger side) I had this one pressure checked and we are OK ... chas34
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| chas34 | -- 09-15-2014 @ 6:02 PM |
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oops ... need to send topside view, Also ... chas34
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