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03-07-2015, 12:21 AM | #1 |
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Join Date: Jul 2012
Location: Winston, OR
Posts: 26
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Final word on reusing head bolts..?
I have a stone stock 283 out of a 64 Chevelle that ran but had low compression on one cyl. I pulled the heads, flipped them over, and filled the chambers with fluid, a few exhaust and all intake valves leaked. So the plan is to lap the valves, put the heads back on with new gaskets, and see what happens. I'd like to reuse the stock head bolts so I spend the least amount possible in case the engine don't work out. So, can I reuse the old bolts or am I begging for failure? I didn't keep them in order if that matters.
Thanks- John
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'59 Apache, short Fleetside, work in progress. |
03-07-2015, 12:30 AM | #2 |
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Location: Vashon WA
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Re: Final word on reusing head bolts..?
reuse...
there not stretch bolt and the torq is Max 85lb if the bolts have no sign of cracking through the thread portion go for it Clean thread and run a tap through the thread hole Check manual for address of sealant in certain bolts When installing the head gasket VERY important the sealing surface be clean and dry (Block/Head) some would wipe down both surfaces with thinner Run it for a few Heat/Cool cycles (around 500 Miles) revisit torq...Sp .
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03-07-2015, 12:41 AM | #3 |
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Re: Final word on reusing head bolts..?
Been done for years and years no problem unless you are running 15 to 1 compression or a turbo with insane boost .
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03-07-2015, 01:09 AM | #4 |
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Re: Final word on reusing head bolts..?
Sweet, that's exactly what I was hoping to hear. Thanks guys.
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'59 Apache, short Fleetside, work in progress. |
03-07-2015, 10:46 AM | #5 |
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Join Date: Aug 2006
Location: Wheat Ridge, Colo.
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Re: Final word on reusing head bolts..?
Make sure to use a tap to clean the head bolt threads in the block to get an accurate torque reading. I've reused the head bolts in my last three SBC builds with no problems.
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03-07-2015, 11:03 AM | #6 |
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Join Date: Sep 2011
Location: Nevada City, CA
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Re: Final word on reusing head bolts..?
I think I recall my ASE guidebook saying "reusse max of once", proviso being that a lot of newer engines have torque-to-yield fasteners that you can't reuse at all.
On the Chev... go for it. Clean the holes out, clean the bolts, check for damage - but you'll be fine.
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"Over my head" 1957 Chevy 3200, big rear window & 6 lug. Front disc, power steering, Vortec 4.8 / 4L60E swap, hydro boost brakes & patina. |
03-07-2015, 03:51 PM | #7 |
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Location: Idaho
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Re: Final word on reusing head bolts..?
+ on reuse. I do not recall ever buying new head bolts except for the race engines. If you think the heads have been off and on a lot then you might think about it. Since it looks like you are the first to crack it I would not worry.
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1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project |
03-07-2015, 08:24 PM | #8 |
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Location: Lebanon, Ohio
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Re: Final word on reusing head bolts..?
Notice that the bolts go directly into the water jacket on the SBC. Be sure to use a dab of gasket sealant (blue goop, black goop, etc.) on the threads.
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Bob "It won't take long and it won't cost much." '55 3100 (383/700R4)--'55 Belair Sedan (350/4-speed)--'64 'Vette Conv. (327/4-speed)--'68 GTO Conv. (462/4-speed)--'69 Cutlass Conv. (350/TH350)--'06 'Vette Conv. (LS2/6-speed) Bob's Retirement Build - My 55 TF Bob's 700R4 Build (how-to) |
03-07-2015, 09:10 PM | #9 |
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Re: Final word on reusing head bolts..?
same with water pump bolts....
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1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project |
03-08-2015, 12:47 PM | #10 |
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Join Date: Aug 2011
Location: Tucson, AZ
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Re: Final word on reusing head bolts..?
85 pounds is a little steep for a small block. 65 is where they need to be.
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