peterallen Posted March 27, 2017 Report Share Posted March 27, 2017 Hi folks, Can anyone suggest a reliable company in the Portsmouth,Southampton area to unlead my cylinder head. Done the usual online and phone book searches but would prefer to use a recommended place. Cheers. Pete. Quote Link to post Share on other sites
RogerH Posted March 27, 2017 Report Share Posted March 27, 2017 Hi Peter, welcome to the forum. as you have just started posting it would be a good idea to change your forum name. Posting your email address may cause you problems with spammers etc. If there is nobody down south to sort your head then Classic & Modern Engine Service do a very good job. They are in Bracknell up the M3 http://cmesuk.com/ Roger Quote Link to post Share on other sites
Alec Pringle Posted March 27, 2017 Report Share Posted March 27, 2017 Hi Pete, you could try Saunders in Cadnam, Southampton Road . . . . . reliable in my experience. Usual disclaimers ! Cheers Alec Quote Link to post Share on other sites
barkerwilliams Posted March 27, 2017 Report Share Posted March 27, 2017 Pete, There are two methods used to fit hardened exhaust seats for unleaded fuel. The traditional method used a slightly larger new seat, frozen to shrink it and fitted to the machined out old seat. The newer method is to use a seat that fits into the machined out seat at room temperature and use adhesives to secure it. Most (all) workshops use only one method, so first decide what style or work you want then check out the workshops. Sorry to complicate your options. Alan Quote Link to post Share on other sites
oldtuckunder Posted March 27, 2017 Report Share Posted March 27, 2017 Why bother ? Alan Quote Link to post Share on other sites
GT6M Posted March 27, 2017 Report Share Posted March 27, 2017 Why bother ? Alan cos this happens https://www.google.co.uk/search?q=triumph+valve+recession+on+exhaust&client=firefox-b&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjn8cHB5ffSAhXLC8AKHQsBCWoQ_AUICSgC&biw=984&bih=573&dpr=1.25#tbm=isch&q=triumph+2000+valve+recession+on+exhaust&*&imgrc=ZUS4SBEdO772rM: M Quote Link to post Share on other sites
RogerH Posted March 28, 2017 Report Share Posted March 28, 2017 Hi Marcus, indeed valve recession can happen but with most peoples limited mileage and at touring speeds (with quality petrol) it should have a long life without the inserts. If one is doing many miles or constant high revs then definitely go for the inserts. Roger Quote Link to post Share on other sites
littlejim Posted March 28, 2017 Report Share Posted March 28, 2017 If you are working on the donk, replacing the valve seats is something you might as well get done at the same time as everything else. Quote Link to post Share on other sites
GT6M Posted March 28, 2017 Report Share Posted March 28, 2017 Another thing t,consider, which ive fun oot is the SS valves that are being selt thee,s things ive found are v v soft, the inserts I got in are OK, butt the SS valves keep getting v v pitted so much so, Ive had to change em oot, as ground em back so many times, they getting v v thin on margin So, bunged in OE valves, see how they fair up. M Quote Link to post Share on other sites
Graham Posted March 28, 2017 Report Share Posted March 28, 2017 (edited) Another thing t,consider, which ive fun oot is the SS valves that are being selt thee,s things ive found are v v soft, the inserts I got in are OK, butt the SS valves keep getting v v pitted so much so, Ive had to change em oot, as ground em back so many times, they getting v v thin on margin So, bunged in OE valves, see how they fair up. M I don't know if this is the case but the fact that some SS valves are very soft may have been what saved my head. My head was modified by Osseli in the 80's the valves where HUGE nearly touching each other extra thin valve stems etc, anyway heads were plentiful then and so was leaded gas so not a problem ……..sold the car then recently bought it back with 80-100000 miles on the engine when it was pulled apart the valves were shot but the head only needed a decoke ! I'm gong to replace it as is and use additive for the time being and see if I get another 1000000 out of it Edited March 28, 2017 by Graham Quote Link to post Share on other sites
oldtuckunder Posted March 28, 2017 Report Share Posted March 28, 2017 cos this happens Hi Marcus, indeed valve recession can happen but with most peoples limited mileage and at touring speeds (with quality petrol) it should have a long life without the inserts. If one is doing many miles or constant high revs then definitely go for the inserts. HI guys, yes sorry for the brief statement I had been going to say if your only doing limited and road type mileage - why bother. And in these circumstances how many people have actually experienced any serious erosion. If your experiencing a problem then by all means fit them, but as its an option that's always available why do it unless you have a problem. Personally in my limited mileage competition engine I have never seen any sign of it, however by default my valves get a gentle lap on each strip. However that does mean that any lead memory my seats may have had is long gone. If I had a problem I would fit them, however my default is why introduce something that does have a small failure risk unless needed. Alan Quote Link to post Share on other sites
Lebro Posted March 28, 2017 Report Share Posted March 28, 2017 +1. Quote Link to post Share on other sites
DaveR Posted March 28, 2017 Report Share Posted March 28, 2017 I have seen valve recession on the 4 cylinder 1500 Spitfire/Dolomite engine, the head has the same build as the TR5/6 six cylinder engine. But to be fair it was fitted into a Herald Estate that had been regularly used to tow a boat long distance's on Motorways. So it had a hard life. With limited mileage/use I would wait until the engine needs a rebuild. Dave Quote Link to post Share on other sites
stillp Posted March 28, 2017 Report Share Posted March 28, 2017 Valve recession happened sometimes when we all used leaded petrol, so I'm with the "wait until there's a problem" group. Maybe I'm biased - I once had a valve seat insert drop out (on a 1.8 Vauxhall Magnum) at high speed on the M1. Pete Quote Link to post Share on other sites
peterallen Posted March 28, 2017 Author Report Share Posted March 28, 2017 Hi Peter, welcome to the forum. as you have just started posting it would be a good idea to change your forum name. Posting your email address may cause you problems with spammers etc. If there is nobody down south to sort your head then Classic & Modern Engine Service do a very good job. They are in Bracknell up the M3 http://cmesuk.com/ Roger Thanks Roger, do you know how to do this? I've had a look myself about how to change my username but can't make sense of the website...Thanks. Quote Link to post Share on other sites
peterallen Posted March 28, 2017 Author Report Share Posted March 28, 2017 Hi Pete, you could try Saunders in Cadnam, Southampton Road . . . . . reliable in my experience. Usual disclaimers ! Cheers Alec Hi Alec, I've seen there website and they did look promising, I'll give them a bell. Cheers Pete. Quote Link to post Share on other sites
RogerH Posted March 28, 2017 Report Share Posted March 28, 2017 Hi Peter, send Wayne Scott a PM and he will change it for you - tell him what it should be Peter Allen would be excellent. You can either find a post be Wayne - there are a few. Or go to the top of the page and click on members. Scroll down to W and then Wayne. Click his avatar and send him a PM Roger Quote Link to post Share on other sites
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