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I supported Toymods
Location:
Ryde, NSW
Registered:
April 2004
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Help with 4A-GE oil consumption.
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Wed, 10 August 2005 13:39
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Hey all, my 4AGE small port has been going through a load of oil recently
1L/1000kms), there is a slight oil leak but not enough to explain the oil consumption. Carried out a dry and wet compression test. came up with these results
Specs: 142-179psi
Dry
Cyl 1: 195psi
Cyl 2: 195psi
Cyl 3: 190psi
Cyl 4: 180psi
Wet
Cyl 1: 210psi
Cyl 2: 210psi
Cyl 3: 205psi
Cyl 4: 210psi
bit high wouldnt you think??
what was more interesting was the oily threads on the number 4 spark plug
any body got any ideas on the problem.
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Location:
tas
Registered:
June 2002
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Re: Help with 4A-GE oil consumption.
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Wed, 10 August 2005 14:37
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My friends Celica has the exact same dam problem. Originally thought it to be valve stem seals. After a bitch of a job that took a couple weeks to change 16 of the bastards, Oil consumption was just as bad as before.
The compression readinga we got from a dry and wet are pretty much EXACTLY the same as yours!
Take a look inside your throttle body and open the butterfly up, what does it look like inside? caked up with chunky oil?
Could be a PCV related problem. Or as i've been told the compression readings don't always mean your oil ring isn't stuffed, but i fail to see that bieng a problem with burning oil.
You could try an oil catch can and seeing if the oil consumption ends up in there. Or make your own oil catch can with a coke bottle and tape. (just for testing purposes, drive it for a few days to a week and see how much oil ends up in there)
route the PCV hose from the head to the bottle, and block the hole in the intake manifold that the PCV hose use to go to. Also put a hole in the top of the coke bottle so it can breath.
Keep me updated with what you find out.
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Location:
Somewhere on a dirt bowl ...
Registered:
August 2004
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Re: Help with 4A-GE oil consumption.
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Wed, 10 August 2005 14:38
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The high readings could most likely be from carbon build up. The seals on the valves could possibly be shot causing the oil to leak into cylinder 4 (or cylinders). See about getting a leak down test at a mechanics it'll give a better idea if the rings or valves are dead.
Are you sure you only have a slight leak ? Cause do remember hot oil is more or less runnier then cold oil and when the motor's running the block is under pressure from combustion pressure etc leaking past the rings.
Something of an idea - Clean up the oily spark plug and swap it around with one of the other plugs. Take the car for a spin and pull the plugs, if #4 plug has oil you've most likely got troubles with that cylinder (rings, valves or seals).
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