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08-11-2017, 11:12 PM
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#1 |
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Blue 67
 Join Date: Apr 2004
Location: Western WA
Posts: 1,169
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Rebuilt heads and breaking in
Hi:
If The heads are rebuilt, does the engine needs to go through any breaking in process? If yes, what is that and how does it get done?, Any specific oil to use? I am reusing the original rocker arms and push rods, and heads are rebuild too stock specs, nothing wild. The engine is a 5.3 vortec. Thanks
__________________
1953 GMC 3/4 ton: current project 1967 C20: 5.3 voretc with T5 conversion, 4 wheel 8 lug disc brake 1972 Nova: my 4 door sport sedan! 5.3 voretc + T5 conversion. drivable project, FUN!! 1979 Camaro Z28: 5.3 vortec conversion with build TH350: drivable project, Fun to drive 1992 Camaro RS convertible (Z28 clone): 5.3 conversion with build T5: on going project 2005 Silverado 2500, 4x4 Duramax, original owner |
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08-11-2017, 11:38 PM
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#2 |
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Senior Member
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,794
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Re: Rebuilt heads and breaking in
If you just did the heads you really don't need any type of break in.
I'm assuming you didn't replace the cam or lifters.
__________________
I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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08-11-2017, 11:45 PM
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#3 |
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Blue 67
Join Date: Apr 2004
Location: Western WA
Posts: 1,169
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Re: Rebuilt heads and breaking in
Cam, lifter and everything else is the same.
__________________
1953 GMC 3/4 ton: current project 1967 C20: 5.3 voretc with T5 conversion, 4 wheel 8 lug disc brake 1972 Nova: my 4 door sport sedan! 5.3 voretc + T5 conversion. drivable project, FUN!! 1979 Camaro Z28: 5.3 vortec conversion with build TH350: drivable project, Fun to drive 1992 Camaro RS convertible (Z28 clone): 5.3 conversion with build T5: on going project 2005 Silverado 2500, 4x4 Duramax, original owner |
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08-12-2017, 07:06 AM
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#4 |
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Registered User
Join Date: Apr 2010
Location: Guntersville Alabama
Posts: 1,073
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Re: Rebuilt heads and breaking in
There is no real reason to break heads in . If I have the heads off what I like to do is put it thru a full heat cycle so every thing will expand and seat it self in a full cool down and then hammer on it .
Even if I did a cam and lifter & spring change I would do the same . The cam and lifters are different form the old days . |
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08-12-2017, 08:20 AM
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#5 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,217
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Re: Rebuilt heads and breaking in
nope no breaking not even on the cam in those they are roller cams
__________________
David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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08-12-2017, 11:58 AM
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#6 | |
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Senior Member
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,794
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Re: Rebuilt heads and breaking in
Quote:
__________________
I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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