triple j Posted May 30, 2013 Posted May 30, 2013 I cant see very well on my phone here, is there anything melted/scored. Quote
Chrishoughton1989 Posted May 30, 2013 Author Posted May 30, 2013 No noting is melted or marked. Just looking at colour and clean patches. Good/bad Quote
funny onion Posted May 30, 2013 Posted May 30, 2013 Been running lean/hot that IMO. Shiny patches on the inlet side....Check my melted pistons thread, mine looked the same Quote
Chrishoughton1989 Posted May 30, 2013 Author Posted May 30, 2013 Is it ? It's been running a few months would it have melted by now if its lean ? Quote
AdamB Posted May 30, 2013 Posted May 30, 2013 Looks like its been running well to me, looks a little on the rich side due to the carbon deposits, but thats normal on a turbo motor and one thats been ran for some time. Combustion looks as if its been well under control, the area of no colouration is known as the squish area, you'll probably find that this ares of the cylinder head also has little carbon deposit build up. On cylinders 2 & 3 at the bottom where there is also no colouration could well indicate that the piston is coming too close to the combustion chamber, this retards the ignition flame. Quote
Chrishoughton1989 Posted May 30, 2013 Author Posted May 30, 2013 Thanks for answer. So the 2&3 clean patches on exhaust side are these a problem ? Quote
AdamB Posted May 30, 2013 Posted May 30, 2013 I would check the cylinder head for the same kinda colourless patches, I wouldn't worry about it as the spark plug is slap bang in the centre of the head, this is where combustion is going to take place, hence the build up of carbon. You will be losing a touch of power on these cylinders, but in terms of the health of the engine its nothing to be scared about Quote
Chrishoughton1989 Posted May 30, 2013 Author Posted May 30, 2013 Good. So what would cause this? Could it be running rich ? Because there was a slight hesitation before boost ? Quote
AdamB Posted May 30, 2013 Posted May 30, 2013 A turbo motor will always run slightly rich. Whats the reason for pulling the head off in the first place? This would be very unlikely to cause your hesitation problem providing you have good compression. Quote
Chrishoughton1989 Posted May 30, 2013 Author Posted May 30, 2013 Overheating. I will do a compression test when all back together. Quote
AdamB Posted May 30, 2013 Posted May 30, 2013 Did you check for any blockages in the cooling system? Change the thermostat? Quote
Chrishoughton1989 Posted May 30, 2013 Author Posted May 30, 2013 Yh. Tried everything. It only overheated when slowed down from going fast. Was fine going slow. But coolant stunk of fuel. It's all on another post. This was the last thing and one I didn't want to do lol. Quote
triple j Posted May 30, 2013 Posted May 30, 2013 Looks to be a leek between cylinders 2 and 3, skim head an block with a new gasket an it should be good. Quote
AdamB Posted May 30, 2013 Posted May 30, 2013 Gasket looks blown between 2&3, and slightly gone on 3 to 4. Quote
TurboTobz Posted May 30, 2013 Posted May 30, 2013 I'd have to agree a little rich but as we know that's the norm with our cars. Quote
Chrishoughton1989 Posted May 31, 2013 Author Posted May 31, 2013 I getting head skimmed but not block. Unlikely the block warps isn't it ? Quote
AdamB Posted May 31, 2013 Posted May 31, 2013 Its not likely the block will warp but check it with a straight edge and a torch. Its essential to atleast check it if the short motor isn't being removed from the car. Quote
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