Is the oil trap below the intake manifold cleanable? The oil was free from coke/grit/charcoal when I drained the engine post head gasket replacement and the oil filter passages were clear, but there were a few coke deposits in the inner small grooves of the valve cover.
Wondering if I should bother pulling and cleaning or replacing the oil trap before putting the intake manifold back on.
Clean or replace oil trap?
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volvolugnut
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If I had the intake off, I would remove and inspect the oil trap box. It can be cleaned, but you can't open it, so it is flush cleaning mostly. If nasty, I would buy a new one.
If you have the intake off are you doing the full PVC cleaning/replace?
volvolugnut
If you have the intake off are you doing the full PVC cleaning/replace?
volvolugnut
The Fleet:
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Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
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And others.
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
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Farmall tractors: 1956 400 Diesel, 1946 A
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chrism
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If your car in a turbo then your can probably clean out the oil trap with carb cleaner or the like. However if your car is a non-turbo then there will be a vacuum control diaphragm that is integral to the oil trap. Those diaphragms get coked up to the point of failure making the oil trap a throw-away item.
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beewstew
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@volvolugnut appreciate the info on cleaning - I'll probably try it along these lines https://charm.li/Volvo/2004/XC70%20L5-2 ... %20Repair/
Re "full PVC cleaning/replace" I don't know what this is. I'm operating on a "while everything is apart" impulse - nothing more sophisticated. Are you talking about this procedure? https://charm.li/Volvo/2004/XC70%20L5-2 ... %20Repair/
Re "full PVC cleaning/replace" I don't know what this is. I'm operating on a "while everything is apart" impulse - nothing more sophisticated. Are you talking about this procedure? https://charm.li/Volvo/2004/XC70%20L5-2 ... %20Repair/
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cn90
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If you have a lot of money, replace it.
Otherwise, re-use it after cleaning with gasoline +/- carb cleaner as mentioned above. It is just a simple plastic box.
Some years ago, I cut open the PCV trap (PN 1271988) in my 1998 S70, you can see the inside anatomy in this thread below. The design of P2 and P3 oil trap is almost identical...
viewtopic.php?t=55470
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Otherwise, re-use it after cleaning with gasoline +/- carb cleaner as mentioned above. It is just a simple plastic box.
Some years ago, I cut open the PCV trap (PN 1271988) in my 1998 S70, you can see the inside anatomy in this thread below. The design of P2 and P3 oil trap is almost identical...
viewtopic.php?t=55470
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volvolugnut
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This thread talks about the full PCV service I mentioned. Sorry I stated PVC instead of PCV. This is the Positive Crankshaft Ventilation system.beewstew wrote: ↑01 Dec 2024, 20:49 @volvolugnut appreciate the info on cleaning - I'll probably try it along these lines https://charm.li/Volvo/2004/XC70%20L5-2 ... %20Repair/
Re "full PVC cleaning/replace" I don't know what this is. I'm operating on a "while everything is apart" impulse - nothing more sophisticated. Are you talking about this procedure? https://charm.li/Volvo/2004/XC70%20L5-2 ... %20Repair/
viewtopic.php?p=579887&hilit=pcv+service+clean#p579887
volvolugnut
The Fleet:
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
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volvolugnut
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Just had a DA moment. Sigh.
volvolugnut
volvolugnut
The Fleet:
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
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erikv11
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As per this older thread, the box itself is hollow, what chrism refers to is a diaphragm that sits on top of the box: viewtopic.php?t=99781chrism wrote: ↑01 Dec 2024, 20:46 If your car in a turbo then your can probably clean out the oil trap with carb cleaner or the like. However if your car is a non-turbo then there will be a vacuum control diaphragm that is integral to the oil trap. Those diaphragms get coked up to the point of failure making the oil trap a throw-away item.
Here is chrism's pic of it for an 03 NA:
- Oil_Trap_03_NA.jpeg (50.41 KiB) Viewed 544 times
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'07 XC70, black, 205k
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'99 Camry V6
153k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6
153kgone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k
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