oil build up in intake? =/

[rodama5anthony]

so took the throttle body off to change my spark plugs and i quickly noticed a good amount of oil build up in the y-pipe and the side of the throttle body thats only visible once u take it out. If i remember correctly this is do to a warn out intake manifold gasket? if anyone can confirm or correct me that would be nice.

 

[Poodles]

PCV and EGR, it's normal.

 

[bioskyline]

what poodles said. a catch can catches most of that lovely stuff.

 

[hvyman]

Excessive amounts could be from bad rings.

 

[mkiiichip]

May be turbo related also.

What have you checked?

 

[hvyman]

Hes n/a hence the y pipe.

 

[rodama5anthony]

yup n/a havent checked anything yet got to finish to spark plugs before it started to rain. so the pcv and/or egr may need replacing?

 

[bioskyline]

the 7m dont have a PCV valve like most cars, there a striaght thru vent. a PCV oil catch can is only way to slow it down. the EGR will leave a layer of carbon (black soot) in the intake, and as your in CA you cant disable it or you will fail emission testing. only way to deal with that is spray the intake with carb clean evey now and again to try to keep it down, or polish the inside of your intake system, as it wont stick to a smooth surface

 

[hvyman]

Umm yes the 7m does have a egr valve.

http://www.cygnusx1.net/Supra/Library/EPC/291210/catalog.aspx?F=2501&P=1

Egr does not get used during wot or cruise.

You will get carbon build up from the egr and black oil residue from the pcv. Adding a catch can will solve the oil part.

If its excessive and your blowing smoke from it you have other problems

 

[mkiiichip]

I think he was saying that the 7m does not have a PCV valve.

And the EGR is definitely used during cruse.

 

[bioskyline]

yes i meant PCV valve.

 

[rodama5anthony]

alright so for the most part its normal? and a catch can will reduce any oil build up but nothing can really be done about the soot? am i understanding this correctly?

 

[Poodles]

Yep, it's years of buildup.

 

[bioskyline]

more or less normal. aslo remember your car is the 89-92 style, so its been breathing oil and soot for the last 15+ years. and the soot yes you will have to live with it.

 

[rodama5anthony]

lol alright thanks guys was alittle worried cus remember reading somewhere here that might be a bad intake manifold gasket