I bought my first chevy truck last may after a few weeks realize that I am loosing coolant and after much research I found out that I have the Castech Head issue. So I been trying to decide how I will fix this. I been looking for a cylinder head to replace it but I really don't know much about it. I have a 2004 chevy silverado with 5.3 and 706 casting on it. I don't want to give up on the truck it's my dream truck so I need to figure out what can I replace the head with beside Castech and don't want to spend a bundle. Any help will be great thank you

 

Are you wanting to do an upgrade? If not there are plenty of heads floatin around in the classifieds

 

 

Believe it or not gm has a cooling system sealing tablet that is available that will work great. I'm not one to recommend this stuff ever but it is a gm product and does work my wife's tahoe with the same shitty heads had the same problem before we got married and I put 3 of the tablets in and it's been 3 years and hasn't lost a drop yet.

If not a head swap will be the only thing to fix it.

 

I was looking at my old heads last week, and noticed the Castech symbol on them. I never had any problems with coolant loss until I popped a head gasket at over 170K miles on the longblock & head gaskets, and I went 11's with them...

BTW, the heads are still good, and I'm thinking about putting it back together with new gaskets, just to have a backup engine.

 

I don't want an upgrade.. I just want to replace the head. I check the classified and didn't find it. I don't want to get another castech head I was told that I should get a 862 mine is 706

 

I went there and ask them about the Tablet they told me they dont know what I'm talking about.. that is the first thing I did first

 

GM sealing tablets Part#12378255 or ac delco #10-108 is what you need if you want to try it. I say do it like I said my wifes tahoe is still holding good after three years.