Quote:
Originally Posted by Mikebrinda
Why doesn't the factory use bronze valve guides?
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If I get it right, the material is not the problem. Although GM is maybe going for cheap here using stainless steel valve guides, it is really the machining error of the guides that blow up the engines.
I believe you can perfectly get stainless steel valve guides, have them inspected to be free of machining errors before installation, and have a reliable LS7. However, since we are paying money to have the job redone anyway, why not just get bronze valve guides.
I think that is the logic here.
Quote:
Originally Posted by Zslash28
Not until I pay off the car can I modify it, says my wifey. Decisions, decisions. I'll be watching everything there is as this issue develops in our Z/28 community.
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Your wife is right. I'm a finance professional, and I agree with your wife.
Saving and investing for all future needs (medical, children's education, entrepreneurial endeavour) should be the priority. Modifying a car to go fast is when you have money to burn.
Preventive measures are different though. I wouldn't mind spending $2K on a Z/28 to have some precisely machined bronze valve guides installed and the factory valves surface-treated in molybdenum, so the engine won't sit like a grenade, waiting to blow up someday.
