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Coolant Loss 4.8 & 5.3 Vortec GM

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08-27-2015, 03:23 PM

#10

MalibuSSwagon

Registered User

Join Date: Sep 2009

Location: Weare,NH

Posts: 1,592

Re: Coolant Loss 4.8 & 5.3 Vortec GM

Quote:

Originally Posted by ls1nova71

This has been a known problem for years. It was a manufacturing defect. Google 'Castech heads' and you'll find out all about them and how to tell if your engine has them. If I recall correctly theyre the 862 heads.

706 and SOME 862's had this issue. Google it and you'll find a detailed thread on ls1tech. I checked my heads over to be sure, no Castech logo and no cracks.

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