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Location:
Rocklea qld
Registered:
February 2003
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another 18rgeu question for the experts
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Sun, 12 September 2004 07:38
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I was having trouble getting my 18rgeu to start so i borrow a set of carbs and put them on. I got the engine to start but it was real rough and would not idle at all...I checked the timing about 5 times (cam timing included because ivge put a new HG in it) and it was all fine. i then checked spark. I removed certain leads and tried to start it. I removed 3 and 4 at the same time and started the engine and there was no change to it in the way it was running. I then put them back on and removed 1 and 2 leads and the engine would not run at all. but there was spark there. I then noticed what looked to be fuel coming from the throats of the second carb(cyl 3 abd 4)so i thought to much fuel was maybe flooding it so i put the original mechanical pump back on but no change still. On closer inspection i found that i think it is actually oil coming from the carbs. So i did a compression test incase the rings were gone and found 1 and 2 cylinders were about 120 but 3 and 4 were 0. i then decided to remove the head since im about to rebuild it anyway and found the intake valve on the third cylinder was stuck open and appears to be bent. Would that being stuck open coz the oil to be coming out of the carb? The most oil was coming from the throat on cylinder 3. I still cannot find any reason for cylinder 4 to have 0 compression though. Whats the best thing to do with the valves. Replace the bent one or just replace them all? Im about to turbo it so if theres some gains to be had by using other valves id like to know if not ill go back to original. What would cause the valve to bend. Would the bent valve be the reasoin for oil coming out or could it just be fuel? The tops of the pistons were dry with no oil present. and help would be great on this.
Also whats the centre shaft called that has the 2 cahins running of it at the front and runs the oil pick up. I need to replace my bearings for it but am unsure exactly what its called and repco also dont know.
Also whats a thrust washer?
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Location:
Brisbane
Registered:
February 2003
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Re: another 18rgeu question for the experts
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Sun, 12 September 2004 08:56
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youch... that must of been the clunk we heard?
if you're removing one valve, then pull the lot off and inspect them all. including valve guides and seats. VRS kit comes with new seals also so install them all while it's apart.
as you're going turbo, you really need the seats checked - see them pics of phil's head for badly damaged valve seats...
as to why they might have bent - incorrect cam timing? got stuck in the guide so the piston came up and give it a nudge? wrong pistons or cams?
He went stainless valves i think - check his thread for info about the valves... i run standard valves in my 18R so i guess the factory items (or stock replacements) are workable for turbo. If you were building a track car, then somethingmore exostic, or getting the exposed face and stem ceramic coated might help.
i dunno why the oil would leak out of the carbo - being tipped upside down will do that - otherwise, the oil reservoir has a leak or is being pressurised. With stuck intake valves you will get massive back pressure back thru the carbis as the piston comes up and puches a lot of air back out the intake valve
thrust washer takes up lateral play (e.g. in crankshaft, it stops/controls motion forward/backwards) it wears instead of the thing moving back/forwards and usually has oil channels for suitable lubrication. for things like camshafts, it might be a plain washer.
also... you might find budget auto parts at oxley useful - their staff know reasonable amount about toyotas.
cheers,
charles.
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Location:
Hobart
Registered:
June 2002
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Re: another 18rgeu question for the experts
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Sun, 12 September 2004 09:14
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| people100 wrote on Sun, 12 September 2004 17:38 |
i thought to much fuel was maybe flooding it so i put the original mechanical pump back on but no change still.
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dont run the carbies off a high pressure efi pump, this will flood it.
real bugger about your valve. turn the engine over gently by hand after you put it back together before trying to start it next time.
cheers
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Location:
Rocklea qld
Registered:
February 2003
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Re: another 18rgeu question for the experts
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Sun, 12 September 2004 09:45
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i was only running a efi pump from a old mazda that has a carb engine so i didnt think it would be to higher pressure(id already removed my vl turbo one) I did originally turn it over by hand. Im guessing it was already like that as i bought a efi engine just for the head since i wanted the 88270 head and cams. Im still lost on what a thrust washer is. Where does it go etc?
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