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Old 08-11-2017, 11:12 PM   #1
Nima
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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
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Old 08-11-2017, 11:38 PM   #2
truckster
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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.
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Old 08-11-2017, 11:45 PM   #3
Nima
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Re: Rebuilt heads and breaking in

Cam, lifter and everything else is the same.
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1967 C20, 350 with 3 on tree, 2/14 dual exhaust. 4 wheel disc brake; finally done
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Old 08-12-2017, 07:06 AM   #4
homemade87
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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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Old 08-12-2017, 08:20 AM   #5
truckdude239
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Re: Rebuilt heads and breaking in

nope no breaking not even on the cam in those they are roller cams
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Old 08-12-2017, 11:58 AM   #6
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Re: Rebuilt heads and breaking in

Quote:
Originally Posted by truckdude239 View Post
nope no breaking not even on the cam in those they are roller cams
Good catch. Sloppy reading on my part.
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