Took the intake tube off the TB and Holy Smokes what a mess!
I understand the 4AGE does not have a PCV valve (or mine doesn't), but there is a hose that goes from the valve cover (closest to firewall/intake) to the intake manifold.
What causes soooo much gunk to deposit in the intake? Is it lack of a PCV or EGR?
What can I do to prevent this from happening?
Tye
Gunked up intake
Gunked up intake
1990 Corolla GT-S (AE92)
1985 4Runner - Lifted & Locked
2005 Tundra DC 4x4
1985 4Runner - Lifted & Locked
2005 Tundra DC 4x4
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Re: Gunked up intake
The gunk is accumulated oil mist from the breather pipe.
The best way to avoid this happening is to run the breather pipe to a catch can and then run another pipe from the catch can back to the inlet manifold.
The best way to avoid this happening is to run the breather pipe to a catch can and then run another pipe from the catch can back to the inlet manifold.
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Re: Gunked up intake
The EGR also dumps a lot of soot into the manifold.
Re: Gunked up intake
Catch can eh. Anyone have any pics/material list of their set up?
I successfully deleted the EGR on my 22RE, can this also be done on the 4AGE?
Is there a write up somewhere on what to block off and such, anyone else do this with success?
Thanks,
Tye
I successfully deleted the EGR on my 22RE, can this also be done on the 4AGE?
Is there a write up somewhere on what to block off and such, anyone else do this with success?
Thanks,
Tye
1990 Corolla GT-S (AE92)
1985 4Runner - Lifted & Locked
2005 Tundra DC 4x4
1985 4Runner - Lifted & Locked
2005 Tundra DC 4x4
Re: Gunked up intake
EGR soot and oil/vapor from the breather combine to create the mess you see.
KSD engineering sells a block off kit for the egr. Search around for info on the install, there's plenty out there. It's very easy.
I also vta my breather to an vented can. If you want to keep a closed system I would look for a good air/oil separator vs. a 'catch can.' They are expensive, but do a much better job of capturing oil if designed properly.
KSD engineering sells a block off kit for the egr. Search around for info on the install, there's plenty out there. It's very easy.
I also vta my breather to an vented can. If you want to keep a closed system I would look for a good air/oil separator vs. a 'catch can.' They are expensive, but do a much better job of capturing oil if designed properly.
Re: Gunked up intake
TyzToyz wrote:What causes soooo much gunk to deposit in the intake? Is it lack of a PCV or EGR?
What can I do to prevent this from happening?
It's caused by blow-by, 100% normal in any old tired engine and especially in one that has lots of cold startups, short trips & infrequent oil changes and poor oil drainage from the same side of the head that is vented.
No.
Eliminate the cause/es.
Re: Gunked up intake
TyzToyz wrote:I successfully deleted the EGR on my 22RE, can this also be done on the 4AGE?
Is there a write up somewhere on what to block off and such, anyone else do this with success?
Thanks,
Tye
The simpelest option is to substitute the gasket from the pipe to the manifold with a blanking plate This will make the system look stock but no more gunk in the intake.
To remove the complete system just remove all ERG pipes, modultor, actuator and blink both the exhaust and intake manifold. Also, you have to put a few vacuum caps on the lines that are now unused.
Coffee is what makes civilized life possible in these demanding times...
Re: Gunked up intake
So you clean the crud out once every 25 years or so. Is that really a lot of maintenance to do? <G>
Before you strip the EGR parts, all you have to do is pinch off the EGR's vacuum control line and it should stop working, stop recirculating gas, so you can judge for yourself if that's a good thing or a bad thing. Surgical clamp, hemostat, whatever. Unplug the hose and stick a golf tee in it.
Of course, the O2 sensor, TPS, plugs, rotor, cap, all will need maintenance way more often than the intake manifold, so you could just clean it once and forget it.
Before you strip the EGR parts, all you have to do is pinch off the EGR's vacuum control line and it should stop working, stop recirculating gas, so you can judge for yourself if that's a good thing or a bad thing. Surgical clamp, hemostat, whatever. Unplug the hose and stick a golf tee in it.
Of course, the O2 sensor, TPS, plugs, rotor, cap, all will need maintenance way more often than the intake manifold, so you could just clean it once and forget it.
-- Original owner, 1985 GT-S