JaiMaai Posted November 14, 2019 Share Posted November 14, 2019 The arrow is saying that the spark plug is gone but apparently there is also a problem with the cylinder head itself. My untrained eye can't see anything. Hopefully someone else will spot it quite easily. TIA Link to comment Share on other sites More sharing options...
transam Posted November 14, 2019 Share Posted November 14, 2019 Can you see the light colour on that plug..It is burning different to the rest. I could be wrong, but the plugs look the wrong reach to me, to long.. Link to comment Share on other sites More sharing options...
JaiMaai Posted November 14, 2019 Author Share Posted November 14, 2019 Thanks for the reply. Can you see any issues with the actual cylinder head? Does it appear to be damaged or defective in any way? Link to comment Share on other sites More sharing options...
transam Posted November 14, 2019 Share Posted November 14, 2019 1 minute ago, JaiMaai said: Thanks for the reply. Can you see any issues with the actual cylinder head? Does it appear to be damaged or defective in any way? Second chamber from the left, that brown on the face, is it oil or a stain in the alloy....? Link to comment Share on other sites More sharing options...
JaiMaai Posted November 14, 2019 Author Share Posted November 14, 2019 2 minutes ago, transam said: Second chamber from the left, that brown on the face, is it oil or a stain in the alloy....? Not sure. I don't have the head in front of me just now. Only the photo. The car is in for repair and my wife took the pic. Link to comment Share on other sites More sharing options...
transam Posted November 14, 2019 Share Posted November 14, 2019 1 minute ago, JaiMaai said: Not sure. I don't have the head in front of me just now. Only the photo. The car is in for repair and my wife took the pic. What was wrong with the engine, were you losing water...? Link to comment Share on other sites More sharing options...
canthai55 Posted November 14, 2019 Share Posted November 14, 2019 Had to tell from the pic. I may be wrong But seems that the end of the threaded portion of the plug, just up and to the left of the red arrow - is missing It may have dropped off ... or was struck by the piston That might be what they mean that the head needs work Struck that hard may have cracked the aluminum Link to comment Share on other sites More sharing options...
JaiMaai Posted November 14, 2019 Author Share Posted November 14, 2019 19 minutes ago, transam said: What was wrong with the engine, were you losing water...? It started running rough with a rattling noise, followed by the engine warning light coming on. No obvious coolant or oil leaks. Link to comment Share on other sites More sharing options...
ktm jeff Posted November 14, 2019 Share Posted November 14, 2019 InThe spark plug is of the wrong type. The others are iridium type. Reach is ok , no contact. I think it's a shadow making it look like part of the thread is missing. Burn colour could be because that plug is the wrong heat rating , or it's just been fitted. Link to comment Share on other sites More sharing options...
Kwasaki Posted November 14, 2019 Share Posted November 14, 2019 2 plugs not same looks to me, there's 2 copper core that look Ok but still don't sit correctly, the 2 others don't look right at all. As for cylinder head that's the main thing to sort, it maybe warped. Get the head sorted and put new copper core plugs which are specified for your motor, as Trans said they look too long. Link to comment Share on other sites More sharing options...
taichiplanet Posted November 14, 2019 Share Posted November 14, 2019 not sure what you mean by the spark plug is gone, as there is one in the photo. Unless you mean it wasn't working, then that would be an ignition problem. Maybe the thread for the plug was stripped but that wouldn't usually need a head removal, just a helicoil. All the water jacket holes look in great condition, as does the head. As Kawasaki said above, it may have warped due to bad tensioning of the head bolts but usually you have to machine the face of an alloy head any time it is removed. Also as he also said 2 of those plugs do look weird but could just be the photo. If a plug was too long it would be hitting the piston, so not really a head problem then. What i don't understand is why they have taken the valves out, you'd usually only do that if there is a problem with a valve, valve seat or valve guide. Link to comment Share on other sites More sharing options...
Don Mega Posted November 14, 2019 Share Posted November 14, 2019 plugs not indexed and whats happening with the one on the far right ? Link to comment Share on other sites More sharing options...
kickstart Posted November 14, 2019 Share Posted November 14, 2019 Has it been run it low on water, engine overheated and has warped the head ,the plugs look a bit of a light colour, if though it has got a bit hot. Link to comment Share on other sites More sharing options...
Lacessit Posted November 14, 2019 Share Posted November 14, 2019 What happens when the plug is changed? May be as simple as a shorting insulator on the plug itself. Link to comment Share on other sites More sharing options...
UncleMhee Posted November 14, 2019 Share Posted November 14, 2019 Zoom in on the port to the left of the arrow....is that a hole? About 5-8 mm Do the same on the corresponding port of the cylinder to the left. Is that a gaping hole? Link to comment Share on other sites More sharing options...
JaiMaai Posted November 15, 2019 Author Share Posted November 15, 2019 The head has now been fixed and I'll make sure that they replace the full set of plugs. Time will tell how good the repair actually was. Here's hoping..... Link to comment Share on other sites More sharing options...
johng Posted November 15, 2019 Share Posted November 15, 2019 12 minutes ago, JaiMaai said: The head has now been fixed So what was the problem ??? Link to comment Share on other sites More sharing options...
Dumbastheycome Posted November 15, 2019 Share Posted November 15, 2019 Maybe the lighting makes it look so but to my eye some of the valve seats looks a bit suspect which might be the reason " head has a problem"? A dead plug would/should have been detected well before taking the head off anyway. Link to comment Share on other sites More sharing options...
thaibeachlovers Posted November 15, 2019 Share Posted November 15, 2019 That plug looks different to the others. Slight browning between cylinders could be something. Get the head planed anyway and use the correct plug, but I'd hate to diagnose any problem from a photo. Are the mechanics so useless that you have to ask us what the problem is? I magnified the photo and the slightly brown area between cylinders looks really bad. I hope they machined the head before putting it back on. Either that plug is different from others or it has been overheated/ something as insulation is black while the others are white. Looks like part of a thread inside head, while others are OK. I'm guessing someone changed that plug for wrong sort. Link to comment Share on other sites More sharing options...
JaiMaai Posted November 15, 2019 Author Share Posted November 15, 2019 14 minutes ago, johng said: So what was the problem ??? Unfortunately, I still don't really know. A combination of mechanics that don't speak English and my wife not being able to translate well because she doesn't understand it anyway, was the reason I posted here. I'll just have to monitor it for a while and see what happens. Link to comment Share on other sites More sharing options...
Vacuum Posted November 15, 2019 Share Posted November 15, 2019 15 hours ago, taichiplanet said: What i don't understand is why they have taken the valves out, you'd usually only do that if there is a problem with a valve, valve seat or valve guide. If I'd gone through the trouble removing the cylinder head, I'd do the the same just for checking and perhaps lapping the valves. Link to comment Share on other sites More sharing options...
DaRoadrunner Posted November 15, 2019 Share Posted November 15, 2019 I cannot see anything wrong. Standard procedure before removing head:- Do a compression test, as this will show up where the problem is. Warped head? Run the edge of a long steel rule across the head to see if it is true. Look for signs of head gasket leaks. (Little head:- Have it cleaned and blown at the soapy.) Link to comment Share on other sites More sharing options...
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