HWade Posted June 5, 2009 Share Posted June 5, 2009 Well I had to take a look at a GMC engine that had been standing for a long time, I was hoping that I was going to get there take out the plugs give the points a clean put on a battery fresh fuel and away you go. This was not to be, the engine to start with would not turn, after taking out the plugs and removing the flywheel cover i managed to turn the engine but not all the way over, and when it did move it shot water out of the plug holes. Well spanners in hand I set to to remove the head with a friend of mine, when we did get the head off we could not beleave what we saw, in bore 5 it was full of mucking water with lots of what it seemed to be carbon, there was loads of it. We inspected the gasket and the head and there are no good clues as to how the water and muck has got in to it.The engine is going to need a total strip down and rebuild. Heres a couple of pics of the engine.The picture shows exactly what we found when we took the head off. Howard Quote Link to comment Share on other sites More sharing options...
Markheliops Posted June 5, 2009 Share Posted June 5, 2009 Doesn't look good Howard - be okay with a total strip down. Happy dismantling mate. Quote Link to comment Share on other sites More sharing options...
Stormin Posted June 5, 2009 Share Posted June 5, 2009 At a guess number five inlet valve was open when parked up. Any moisture running in the inlet manifold only had one place to go and washed all the debris in. Hopefully the bores are not too bad. Can they can be re-sleeved or not? Quote Link to comment Share on other sites More sharing options...
HWade Posted June 5, 2009 Author Share Posted June 5, 2009 Hello Stormin Thanks for comments not to sure if you can sleeve these or not, but I will take a better look and clean away all of the carbon to see what the bore is like.If they can have a sleeve that may be the way to go.All depends if the owner wants to spend the money on the engine. Howard Quote Link to comment Share on other sites More sharing options...
stephanedu14 Posted June 5, 2009 Share Posted June 5, 2009 good evening. not very a good surprise. good continuation for the rebuilding of the engine, make us a small photo report of l' avencement joists. Quote Link to comment Share on other sites More sharing options...
HWade Posted June 6, 2009 Author Share Posted June 6, 2009 Hello I will carry on the report of the engine with some pics if the owner decides he wants to re build it.Thanks. Howard Quote Link to comment Share on other sites More sharing options...
abn deuce Posted June 6, 2009 Share Posted June 6, 2009 Quite surprising how much material was able to find its way into those cylinders . What model GMC is this engine in ? Whats the condition of the rest of the vehicle like ? Quote Link to comment Share on other sites More sharing options...
HWade Posted June 6, 2009 Author Share Posted June 6, 2009 Hi there the engine is in a 1943 GMC 353 general sevice truck, its a hard cab type,with the cargo body, the truck is looking a bit sorry for its self but is restorable.As you said i was very supprised to see this amount of carbon in the bore,I expected to do a few things to it and have it running this was a big supprise. I am restoring my own GMC truck and it to had stood for 11 years but i had it running and driving in under an hour, perhaps I was lucky I dont know. Thanks Howard Quote Link to comment Share on other sites More sharing options...
abn deuce Posted June 6, 2009 Share Posted June 6, 2009 Thank you for the details , I d think the only way for the water to be there is perhaps someone used a pressure washer or garden hose and sprayed the engine at some point .and flooded it in through the aircleaner, what did the oil level and condition look like in the aircleaner base ? Quote Link to comment Share on other sites More sharing options...
HWade Posted June 6, 2009 Author Share Posted June 6, 2009 Hi I forgot to say that i did taste the water and it had a hint of antifreeze so I still think water is from engine, not only that it has stood under cover all the time its been standing,I just could not see how water got in.I am going over to take another look next week.Thanks for your ideas. Howard Quote Link to comment Share on other sites More sharing options...
stephanedu14 Posted June 6, 2009 Share Posted June 6, 2009 as an automobile mechanic, I advise to you to make a control of your cylinder head by a spécialiste.le problem of l' entry d' water in the cylinder little to have plusior causes, cylinder head gasket, planéitée of the seedling of joint, cracks or poreusity of the culasse.le price of the test of cylinder head t' will not enmeneras in large dépence but you will be on your cylinder head. Quote Link to comment Share on other sites More sharing options...
HWade Posted June 6, 2009 Author Share Posted June 6, 2009 Hi I think I get what you are saying, I did look at the gasket and there was no evidence of the gasket failing.If the owner decides to spend money on the truck then i will get the head looked at to see if there is any cracks. We will also take a good look at the block. Thanks Howard Quote Link to comment Share on other sites More sharing options...
stephanedu14 Posted June 6, 2009 Share Posted June 6, 2009 No soucis.chez to me in France a modern test of cylinder head 4 cylinders gas oil, with pressurization for control poreusity, flatness, correction, grinding valves, régage of the play to the valves with the push rod (pastilles geauges) costs me 200€.je repards with a high remade engine has nine. Quote Link to comment Share on other sites More sharing options...
HWade Posted June 6, 2009 Author Share Posted June 6, 2009 Hi I think I get it you had the engine pressure checked and had the valves reground, I have to admit on this engine the valves looked in very good condition. Howard Quote Link to comment Share on other sites More sharing options...
stephanedu14 Posted June 6, 2009 Share Posted June 6, 2009 not for control c' is a pressurization of the culasse.on place of the obturators to blow in d' volume; water, one places then the cylinder head in a liquid has temperature of 85°C then one soufle.si there are bubbles there are cracks. Quote Link to comment Share on other sites More sharing options...
HWade Posted June 7, 2009 Author Share Posted June 7, 2009 Hi I have given thought to the head having a crack .I may well make it air tight and do a pressure check on it myself, will have to see what the owner wants us to do. Howard Quote Link to comment Share on other sites More sharing options...
stephanedu14 Posted June 7, 2009 Share Posted June 7, 2009 I doubt that you can see whether there are micro cracks in the cylinder head by tests of pressure controle of compression of the moteur.lors d' a test of cylinder head, in the bath one carries culasseempérature of operation then one there mets the pressure d' air. Quote Link to comment Share on other sites More sharing options...
HWade Posted June 8, 2009 Author Share Posted June 8, 2009 I was going to was going to pressure it to about 40lbs and put in bath of water, well that was the idea, if it does not work then It will get sent off to be done. Howard Quote Link to comment Share on other sites More sharing options...
stephanedu14 Posted June 8, 2009 Share Posted June 8, 2009 it is necessary you to make plates to close the passages d' water on the mating plane of cylinder head, pump water. plunge the cylinder head in a liquid has 85-90°C, it will have you to be waited until the cylinder head takes the operating temperature of the engine then you assembles the pressure d' air. Not need to put to him 2 bars (4 livresPSI) c' is right to see bubbles. Quote Link to comment Share on other sites More sharing options...
HWade Posted June 8, 2009 Author Share Posted June 8, 2009 Hello ok thanks for that information will let you know how I get on. Howard Quote Link to comment Share on other sites More sharing options...
HWade Posted June 11, 2009 Author Share Posted June 11, 2009 (edited) Great News After honing out the bores that had water in them,they have cleaned up really well and giving them a good clean out with diesel and a good oil the engine turned over very well. So all efforts are now on the head I have decided to strip all of the valves bead blast the head and lap in the valves. We also drained the sump to check for water and no water however the oil was very thin and smelt of old petrol, the petrol had been getting in from the fuel pump, so this will need to be rebuilt.Well thats it for now. Howard. Edited June 11, 2009 by HWade Quote Link to comment Share on other sites More sharing options...
HWade Posted June 13, 2009 Author Share Posted June 13, 2009 (edited) Well just in from the work shop after stripping the valves from the head. The valves themselves did not look to bad. But some of the seats look in a sorry state, but untill i get the head bead blasted I wont really know if i have to get new valve seats fitted or just use a stone and regrind the seats.Heres a few pics. Howard Edited June 13, 2009 by HWade Quote Link to comment Share on other sites More sharing options...
stephanedu14 Posted June 14, 2009 Share Posted June 14, 2009 within sight of the photographs, personally I would make make a control by test of the cullasse.j' have large doubt about cracks if ever you must replace seats and valves to see can be also the guides, asks whether your grinding-machine operator not to little put seats and valves for the fuels without leads. Quote Link to comment Share on other sites More sharing options...
HWade Posted June 15, 2009 Author Share Posted June 15, 2009 Hi The head is now going away to be pressure checked if it turns out to be ok,then we will be replacing all of the valve seats and fitting new valves Howard Quote Link to comment Share on other sites More sharing options...
Joris Posted June 15, 2009 Share Posted June 15, 2009 Great stuff Howard, thanks for posting this!! Quote Link to comment Share on other sites More sharing options...
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