sr2 Posted March 24, 2016 Author Share Posted March 24, 2016 YT still make 6 cylinder heads but they are alloy, http://store.yellaterra.com.au/categories/cylinder-heads/holden/holden-straight-6.html?sort=priceasc the replacement valves might be the same? I've been in touch with YT, the alloy Holden 6 heads they make are all 12 ports (Blue or Black mtr) and the valves are different. Big issue is the 5 thou oversize stems, I may have to just bite the bullet and replace all the exhaust guides to bring them back to standard, it would give me a lot more options. I'm still kicking myself for not turning the motor over more frequently! 2 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted March 24, 2016 Share Posted March 24, 2016 We've all done that. Another thing that annoyed me was batteries getting koozed. Purchasing some battery optimisers has paid for itself a couple of times... Quote Link to comment Share on other sites More sharing options...
sr2 Posted March 24, 2016 Author Share Posted March 24, 2016 We've all done that. Another thing that annoyed me was batteries getting koozed. Purchasing some battery optimisers has paid for itself a couple of times... Cheers for that mate, still tears me undies - I'm old enough to know better. On a brighter note; the weather is clearing and it's a long weekend - may just have to take the boat out and catch a few Hauraki Gulf Snappers! Quote Link to comment Share on other sites More sharing options...
jakesae101 Posted March 24, 2016 Share Posted March 24, 2016 Could they be spray welded and then machined to bring back a sealing surface like they do on machine shafts ect. 2 Quote Link to comment Share on other sites More sharing options...
tortron Posted March 24, 2016 Share Posted March 24, 2016 Not a major to drill out the head and press in some brass stem seals. Cast iron if you think you are a racecar owner. Then use whatever valves cut to length you want. IV got to do this myself Quote Link to comment Share on other sites More sharing options...
sr2 Posted March 24, 2016 Author Share Posted March 24, 2016 Not a major to drill out the head and press in some brass stem seals. Cast iron if you think you are a racecar owner. Then use whatever valves cut to length you want. IV got to do this myself LOL; in 20 plus years of motor racing I've always managed to avoided being a racecar owner. Rule number one has and always will be 'go racing on someone else's money'! On a lighter note yes I'm looking and all new guides and possibly hardened seat inserts - the jury is still out on the latter. Quote Link to comment Share on other sites More sharing options...
tortron Posted March 24, 2016 Share Posted March 24, 2016 Cheap enough to get them done while it's apart. That said IV never actually seen a seat recess apart from some tagged out example ones 1 Quote Link to comment Share on other sites More sharing options...
sr2 Posted March 24, 2016 Author Share Posted March 24, 2016 Have to agree with you there mate, the cynic in me wonders if it may be much ado about nothing? 1 Quote Link to comment Share on other sites More sharing options...
Mr Vapour Posted March 24, 2016 Share Posted March 24, 2016 Give segedins a call. They stock guides,, valves and seats ( well they did a few years ago) Dean (dene) or Paul will be the ones to talk to . 1 Quote Link to comment Share on other sites More sharing options...
SOHC Posted March 30, 2016 Share Posted March 30, 2016 I've been in touch with YT, the alloy Holden 6 heads they make are all 12 ports (Blue or Black mtr) and the valves are different. Big issue is the 5 thou oversize stems, I may have to just bite the bullet and replace all the exhaust guides to bring them back to standard, it would give me a lot more options. I'm still kicking myself for not turning the motor over more frequently! Could you have the existing guides reamed out to take the bigger stems? Your about to come into some money so the missis wont mind. Quote Link to comment Share on other sites More sharing options...
sr2 Posted March 31, 2016 Author Share Posted March 31, 2016 Could you have the existing guides reamed out to take the bigger stems? Your about to come into some money so the missis wont mind. LOL; I appreciate your concerns re my financial solvency but the issue with Mrs sr2 is not with expenditure it is with the far more (potentially) explosive issue of where to store my burgeoning spare parts collection! (Believe me I support far more expensive hobbies than just my passion for refurbishing old cars). Re the valve issue; the guides are already oversize, I'll probably bite the bullet and replace them with standard to solve the problem. 1 Quote Link to comment Share on other sites More sharing options...
dr.wylde Posted March 31, 2016 Share Posted March 31, 2016 Oooh ooh ooh. Seen that Blue 3.3 and had to comment freaking good stuff on them engines why not just use the Blue engine? more cubes! 1 Quote Link to comment Share on other sites More sharing options...
Ghostchips Posted March 31, 2016 Share Posted March 31, 2016 why not just use the Blue engine? i was wondering that myself Quote Link to comment Share on other sites More sharing options...
sr2 Posted March 31, 2016 Author Share Posted March 31, 2016 I'm keen on keeping the original block in the car with everything under the bonnet looking as it did in the early 80's. Running the 3.3 Blue counterbalanced crank will bring the capacity of the X2 186 up to 202, (i.e. from 3.0 to 3.3). 1 Quote Link to comment Share on other sites More sharing options...
dr.wylde Posted April 1, 2016 Share Posted April 1, 2016 Oh yeah. Derp sorry Quote Link to comment Share on other sites More sharing options...
chris r Posted April 20, 2016 Share Posted April 20, 2016 I was talking to someone the other day that 3x su would be good/cool on a holden 6. Quote Link to comment Share on other sites More sharing options...
SOHC Posted August 30, 2016 Share Posted August 30, 2016 I got told to tell that engine reconditioner its for your daily driver if you ever take anything to him or it can take a wile, he is a nice guy and knows his stuff tho, he measured up my new flathead and okayed the block. Quote Link to comment Share on other sites More sharing options...
sr2 Posted August 30, 2016 Author Share Posted August 30, 2016 Yeah Wayne's a bit of a character but he sure knows his stuff, paticuarly with older engines. He just rebuilt a 302 for a mates 68 Mustang restoration, it wasn't cheap but it's one sweet little motor. Quote Link to comment Share on other sites More sharing options...
governorsam Posted February 10, 2017 Share Posted February 10, 2017 http://www.trademe.co.nz/a.aspx?id=1259601032 1 Quote Link to comment Share on other sites More sharing options...
sr2 Posted February 19, 2017 Author Share Posted February 19, 2017 (edited) On 2/11/2017 at 11:37, governorsam said: http://www.trademe.co.nz/a.aspx?id=1259601032 Yes I was watching it as well, just sold for $310, a good price in my books. I'm picking it was an early 186 YT stage 3. Good to see it has the square cast push-rod holes (no need for guide plates if running roller rockers). It also hasn't got the high compression combustion chambers which 50 years later is a huge advantage, most of the blocks and heads have been skimmed so many times the challenge has become how to keep the compression ratio low enough for BP98! Edited to say I was watching http://www.trademe.co.nz/Browse/Listing.aspx?id=1261061577 The inlet ports looked very YT but the single rather than double valve springs and the lack of an emblem on the valves left me at the least confused if not skeptical. Edited February 19, 2017 by sr2 Quote Link to comment Share on other sites More sharing options...
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