Im about to remove the YB engine out of the cossie to refurb it and was wondering if bronze valve guides are better or worse than steel ones???
the more research i do, the more contradicting views i get!!!!
does anyone out there know????
many thanks.

 

i had bronze ones put in mine, no reason, the machining company simply said i needed new ones and they got put in, probably doesnt help but thats my experience. is it maybe that the steel valves will wear out the bronze guides and therefore the guides need replacing rather than the valves? seein as the guides are much cheaaper than valves?

 

IIRC the bronze acts as a bearing to the valve stem, so it doesnt wear out the valve stem, instead it wears out the guide.

HTH

 

Bronze is much better, not the best by any means, but much better than the steel ones which are usually crushed particle guides.
The best is COLSHIBO, very pricey, but for a reason, bought as blanks every ones needs machining to fit, that's what I have got.
tabetha

 

just about to put a fresh set of bronze guides in mine over the weekend

 

cossies have bronze ones as standard be worried if it returns to you with anything else!

 

eec4 cossies are cast guides

 

If u use car every day your better off with std ones. If you abuse car for racing and track days your better off with bronze . I spoke to several cylinder head companys and they told me to stick with std cut back guides and ported head for better flow hope this helps

 

bronze it is then! Thanks for the replies.