Chris Wilson Posted January 11, 2007 Share Posted January 11, 2007 In nearly 40 years of building engines I have only ever once seen an engine with a valve stuck open that wasn't bent or the engine was in the most terminal meltdown. Only one was stuck, and it was on a Ford that had known problems with this. For so many to have stuck open in an engine in regular use astounds and amazes me. There MUST be more to it than that... Quote Link to comment Share on other sites More sharing options...
hodge Posted January 11, 2007 Author Share Posted January 11, 2007 Please dont say that Chris, Im hoping it will do the job. My opinion ludicrous as it is. This has happened twice to me but not so severe last time. I think its all to do with petrol sound stupid I know but this is my story. The retard i bought the car off used to run it on 95 ron unleaded, (bloody idiot). Since ive owned it ive always used super unleaded 98 ron. I tried some BP ultimate 1 day parked the car up over night and when I started it the next day it was banging and pluttering, wouldnt tick over, I had to keep my foot on the throttle just to keep it going. I was seriously overfueling to the point of the ehaust was stinking of petrol and if i reved it it blew out black smoke, I filled up the car with super and after a while it was fine. This time, my local garage was closed so I again put some BT ultimate in from the same garage, and again I parked it up over night and had the same symptoms, bu if i reved it it would clear and be fine, Just struggled starting when cold again, then it just wouldnt dtart at all. However far fetched it sounds I think its been accessive carbon build up due to overfueling thats caked up on and round the valve. this is my story and im sticking to it, well hoping its right anyway. Quote Link to comment Share on other sites More sharing options...
Gordon F Posted January 11, 2007 Share Posted January 11, 2007 There MUST be more to it than that... Plus the fact if you had 5 valves stuck open you would have at least 3 cylinders with no compression Quote Link to comment Share on other sites More sharing options...
geoffvalenti Posted January 11, 2007 Share Posted January 11, 2007 I'm amazed. Obviously I agree with CW on this (I wouldn't dare argue ) in that, in all my years of working on cars, I've never come a cross a car that managed to get one valve stuck open by being left overnight, let alone 5 As for the cause of it being down to using BP Ultimate, that's pushing the boundaries of believability far beyond wishful thinking, and deep into full fantasy mode A build up of carbon on the back of (inlet) valves enough to hold them open, takes thousands of miles (if it even occurs these days, with better fuel additives) certainly not the odd dodgy tank of fuel, no matter where it came from. I'd certainly be looking very carefully at everything before I even considered going to the expense of having the head refitted Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 11, 2007 Share Posted January 11, 2007 I'd have all the valves out, all the stems looked at, all the buckets looked at, and all the guides looked at. It won't be the type of fuel, but maybe if it was so seriously overfuelling the actual engine oil may have become saturated in petrol and like water, it wouldn't then lubricate things properly, but if that was the case I'd have expected the turbos to have gone long before the valves seized up. If you don't fully strip the head it will come back to bite you, almost guaranteed. You must sort the overfuelling out, too. O2 sensor and any cats will probably be dead, too. Quote Link to comment Share on other sites More sharing options...
hodge Posted January 11, 2007 Author Share Posted January 11, 2007 Cheers guys, your making me feel a whole lot better. Anyway, fingers crossed when I finished the head the cars gona fire up. Come on guys give me some positive vibes here please. Quote Link to comment Share on other sites More sharing options...
jamesmark Posted January 11, 2007 Share Posted January 11, 2007 Cheers guys, your making me feel a whole lot better. Anyway, fingers crossed when I finished the head the cars gona fire up. Come on guys give me some positive vibes here please. Mate all will be fine, I am going through it just now too with my car bent rear subframe and there is going to be light at the end of the tunnel. Quote Link to comment Share on other sites More sharing options...
Alex Posted January 11, 2007 Share Posted January 11, 2007 I hope it all works the way you want it to, but of it doesn't it would be worth finding out what a replacement head would cost - you might be surprised (pleasently). Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted January 11, 2007 Share Posted January 11, 2007 At a rough guess going along Chris thoughts of petrol contamination, problems with the follower buckets seizing, or possibly if the former owner was a muppet, i wonder if the head gasket had gone badly and neglected, and in the resulting overheat something has distorted or even the valve springs have lost some of there tension. Quote Link to comment Share on other sites More sharing options...
hodge Posted January 11, 2007 Author Share Posted January 11, 2007 I dont think it was contminated fuel i think the car just didnt like it. You wouldnt believe the amount of black smoke it was chucking out when I reved it and the smell of petrol was horendous, I could get high if I stayed next to the exhaust for a min or 2. Quote Link to comment Share on other sites More sharing options...
geoffvalenti Posted January 11, 2007 Share Posted January 11, 2007 Cheers guys, your making me feel a whole lot better. Anyway, fingers crossed when I finished the head the cars gona fire up. Come on guys give me some positive vibes here please. Go and see CW, don't ask his advice about cars, just watch how his ostriches bury their heads in the sand, and see if you can perfect the technique Quote Link to comment Share on other sites More sharing options...
hodge Posted January 11, 2007 Author Share Posted January 11, 2007 Is that a joke. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 11, 2007 Share Posted January 11, 2007 Positive Vibes: Nail the head back on with the old gasket, spray it with WD40, all will be dandy Reality Vibes: Strip it, fix it, find the overfuelling fault, fix it, check for other damage, fix that Quote Link to comment Share on other sites More sharing options...
hodge Posted January 11, 2007 Author Share Posted January 11, 2007 Do I use 4 or 6 inch nails. Quote Link to comment Share on other sites More sharing options...
gaz1 Posted January 11, 2007 Share Posted January 11, 2007 Positive Vibes: Nail the head back on with the old gasket, spray it with WD40, all will be dandy Reality Vibes: Strip it, fix it, find the overfuelling fault, fix it, check for other damage, fix that Quote Link to comment Share on other sites More sharing options...
geoffvalenti Posted January 11, 2007 Share Posted January 11, 2007 5 inch are usually best in these circumstances Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 11, 2007 Share Posted January 11, 2007 Do I use 4 or 6 inch nails. Annular ring 6 inch, in chrome moly plasticene, of course Quote Link to comment Share on other sites More sharing options...
Ian C Posted January 12, 2007 Share Posted January 12, 2007 Do I use 4 or 6 inch nails. In all seriousness the only engine I know of that had a valve stuck open had been sat for two years. And that was only one valve. You can hope for the best but you must also plan for the worst. A good used head with full valvetrain may be the way to go. -Ian Quote Link to comment Share on other sites More sharing options...
Mike M Posted January 12, 2007 Share Posted January 12, 2007 Supragal's had a stuck valve or two I think. Quote Link to comment Share on other sites More sharing options...
Ian C Posted January 12, 2007 Share Posted January 12, 2007 In all seriousness the only engine I know of that had a valve stuck open had been sat for two years. And that was only one valve. -Ian Supragal's had a stuck valve or two I think. That's the one -Ian Quote Link to comment Share on other sites More sharing options...
Kranz Posted January 12, 2007 Share Posted January 12, 2007 Was the BP ultimate that caused this spluttering from the same petrol station?? Just wondering if its water in the fuel causing valve stem corrosion (unless they're stainless?). Otherwise cylinders 5 & 6 are likely to be the hottest running. A crap oil used by the previous owner could have led to varnish deposits being burned onto the valve stems, reducing clearances and gumming up the valve causing it to stick?? Or possibly react with the fuel (inlet valves only) if there's some specific additive in the fuel that turns the varnish into a glue like substance?? All just guesses though! Quote Link to comment Share on other sites More sharing options...
hodge Posted January 13, 2007 Author Share Posted January 13, 2007 Yeah it was exactly the same petrol station. The oil in the car was bought from Envy. Its just the inlet valves I thing that wre clogged up ive only got 1 out at the min and ts thick with carbon deposit, no way would that of gon back into its seat. Quote Link to comment Share on other sites More sharing options...
Nic Posted January 13, 2007 Share Posted January 13, 2007 Any Quote Link to comment Share on other sites More sharing options...
Pete Posted January 13, 2007 Share Posted January 13, 2007 Go and see CW, don't ask his advice about cars, just watch how his ostriches bury their heads in the sand, and see if you can perfect the technique They're emus. I don't *think* they bury their heads? Quote Link to comment Share on other sites More sharing options...
geoffvalenti Posted January 13, 2007 Share Posted January 13, 2007 They're emus. I don't *think* they bury their heads? There's always one smartarse in every thread Anyway, I'm still trying to work out how these valves coked up overnight after 2 tanks of BP Ultimate. Even if you'd have stuffed coal down the inlet manifold I doubt if it would have had the desired effect Quote Link to comment Share on other sites More sharing options...
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