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01-14-2024, 04:07 PM | #21 | |
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Re: Question about using Brumfield head
Quote:
I'll need your assistance doing what you suggested. Thanks! |
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01-14-2024, 04:11 PM | #22 |
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Re: Question about using Brumfield head
OFF-TOPIC, sort of.....
Where & when was the obit published? Searched for it in Waco TX with no results. I liked him and his HC heads, but he always had very strong opinions.
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01-14-2024, 04:22 PM | #23 |
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Re: Question about using Brumfield head
Marshall,
I do have new head studs and nuts ready to install for this build. Fortunately, all the studs had been removed from the engine before I bought it, so that will make checking the threads in the stud holes much easier. I'm glad I learned about installing the studs finger tight only. I did not know that previously. I assumed (wrongly) that all studs were mechanically installed to be tight, so that was important and timely information for me. Did you use the Best head gasket or the FelPro? Just curious. |
01-14-2024, 05:44 PM | #24 |
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Re: Question about using Brumfield head
Use a thread chaser, not a tap, to keep from removing metal and preserve the full thread profile, if it is still there.
FWIW, I have this https://www.toolsid.com/lang-tools/2...-mpn-2581.html |
01-14-2024, 05:45 PM | #25 |
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Re: Question about using Brumfield head
I followed Larry's recommendations for head gasket and always used the 7013 with copper adhesive spray on both sides. I think he was recommending the 7013C gasket towards the end of his manufacturing days, as I recall. If you follow Larry's instructions on your resurfaced block and check the head to be sure it is not too far out of spec, you should be o.k. with the new studs and nuts. Just keep re-torquing the head until you are sick to death of doing it. THEN the head should be seated.
M. |
01-14-2024, 07:49 PM | #26 | |
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Re: Question about using Brumfield head
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01-14-2024, 08:25 PM | #27 | |
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Re: Question about using Brumfield head
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Yes, I have this set of thread chasers and will be using them - no taps. Thanks. |
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01-14-2024, 08:28 PM | #28 | |
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Re: Question about using Brumfield head
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01-14-2024, 11:26 PM | #29 |
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Re: Question about using Brumfield head
I have B-F 5.9 heads on both of my 2 Model A's. Good advice, on both motors I used a composite head gasket, not copper. Both have never leaked nor failed. Both were installed using new studs. One head is on it's second motor. This one I took to an automotive machine shop to be checked for flatness, he removed less than .010" to make it flat. Good Head and a good find on your part. Enjoy.
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01-15-2024, 08:41 AM | #30 | |
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Re: Question about using Brumfield head
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Hmmm Marshall, maybe you are taking this personal?? Installing vs. Repairing is two different things from my perspective. The things that engine rebuilders see is likely different than what those who are installers-only might encounter. As for my recollection, I cannot remember a single Brumfield head coming thru my shop that when removed after use was still true from end to end. Based on discussions regarding this, other engine rebuilders will likely share their similar experiences. Quite honestly, it is not a big deal IMHO as it is repairable when discovered, -and whether it is perceived as negative or not, shouldn't a consumer need to be made aware there is a potential to have an issue with that head?? And for what its worth, I/we have no record or method to know exactly which heads were cast at which foundry and at what timeframe. Also, it would take a metallurgist smarter than me to know the details about and the validity about the curing process, but I suspect the warpage issue had more to do with the quality of metal the foundry was using rather than lack of sufficient cure time. My reasoning for this thought comes from the castings that Ford originally used, and the lack of a lengthy timeline from casting to machining on original Model-A parts. I will leave everyone with a thing or two to think about. Larry subscribed to the mindset that a block & head needed to have a high RA finish (-like over 100+ ) as the gasket surface needed to grip onto small serrations in the head and block. Technology back then, -and what we know now generally counters that mindset. What those serrations did aid in, is when the cylinder case (block), the cylinder head, and the head gasket are all expanding at a different rates due to being different compositions. Had the cylinder case and his cylinder head have been poured with similar composition materials, likely there would never been a need for any RA finish to have been over 40-50 and get a head gasket to seal. |
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01-15-2024, 11:01 AM | #31 | |
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Re: Question about using Brumfield head
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Frank |
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01-15-2024, 11:24 AM | #32 |
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Re: Question about using Brumfield head
emf,
I'm hoping I can join your club!! |
01-15-2024, 11:41 AM | #33 |
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Re: Question about using Brumfield head
[QUOTE=emf;2283899] I bolted that baby down and never looked back. [QUOTE]
Did you "re-torque" the head?
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01-15-2024, 12:15 PM | #34 |
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Re: Question about using Brumfield head
Yes, I re-torqued the head, but only once. I torque the head to 55 ft lbs the first time, then after about a week's worth of driving, I torque to 55 ft lbs again. I usually don't do it a third time. I have been involved with old cars since I was 25 and have rebuilt many engines, both Ford and non-Ford, always doing the same routine. I've never had to replace a head gasket on an engine that I've rebuilt. Maybe I'm lucky.
Frank |
01-15-2024, 04:59 PM | #35 |
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Re: Question about using Brumfield head
Interesting comments about Brumfield heads . I purchased a 5.9 head from Larry in 2006, including a set of bolts and nuts . I have driven over 20000 miles since then with no head issues . Larry’s installation instructions are very clear,about which gasket to use , torquing, re-torquing, etc. He okayed using white grease on both sides of the head gasket. The head has been off a couple of times for unrelated issues, I used a new fel-pro copper gasket each time, white greased them when re-installing .I tourqued to 65 lbs as recommended,I have had no gasket problems at all.Mycoupe is very happy at 55 mph,riding on 600-16 radials, Ken Parker 4speed with od transmission, and Bill Stipe Regrind touring cam. Follow all of Larry’s instructions and get out and enjoy your car as
much as possible . Don S |
01-15-2024, 05:14 PM | #36 |
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Re: Question about using Brumfield head
Don S,
Thanks for chiming in with your personal experience. Since my head came without installation instructions, Vince Falter has Larry's instructions on his website. I will follow them as written. I wish I knew what compression ratio I have. |
01-15-2024, 05:53 PM | #37 |
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Re: Question about using Brumfield head
Most likely you have a 5.9 to 1 head. The vast majority were 5.9 to 1.
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01-15-2024, 06:05 PM | #38 |
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Re: Question about using Brumfield head
Herb,
Thanks for that info. Pretty sure it will be a major improvement over the stocker! |
01-15-2024, 11:09 PM | #39 | |
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Re: Question about using Brumfield head
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01-16-2024, 09:30 AM | #40 | |
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Re: Question about using Brumfield head
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FWIW, since the external shape of the Model-B intake manifold is different too (-making it noticeably obvious), I prefer to modify the stock Model-A manifold by boring the inside about 5% larger than a Model-B, -which is about 30% larger than a stock Model-A intake manifold. |
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