New air intake plumbing for petrol GQ's

Engines and Engine Systems
User avatar
Peter Connan
Moderator
Posts: 6017
Joined: 10 Sep 2010 07:21
Full Name: Peter Connan
Nickname: Piet
Home Town: Kempton Park
Current 4x4: 1996 Patrol 4.5SGL
Home Language: Afrikaans
Location: Kempton Park
Has thanked: 1067 times
Been thanked: 987 times

Re: New air intake plumbing for petrol GQ's

Post by Peter Connan »

Ek dink die groot probleem is dat jy nie 'n carb het nie Dirk...
Mag ons ons kenniskry met lekkerkry aanhoukry.
User avatar
SJC
Patrolman 1000+
Patrolman 1000+
Posts: 3201
Joined: 23 Nov 2014 14:20
Full Name: SJC
Nickname: Fanus
Home Town: Nelspruit
Current 4x4: 4.2 GQ (TB42)
Home Language: Afrikaans/English
Has thanked: 199 times
Been thanked: 173 times

Re: New air intake plumbing for petrol GQ's

Post by SJC »

offroadbiker wrote: 26 Jul 2021 12:17
Peter Connan wrote: 25 Jul 2021 16:26 Hoe kry ons dit by jou?
As jy by iemand kan kry wat rivier toe gaan kan hy dit daar kry.......
Of dit, of courier guy. Laat weet maar wat vir jou makliker gaan wees.
Ek is nie baie haastig nie, sal dit nie nou dadelik gebruik nie, maar wil dit defnitief in die toekoms aan wend ...
1996 Nissan Patrol 4.2 SGL
User avatar
Peter Connan
Moderator
Posts: 6017
Joined: 10 Sep 2010 07:21
Full Name: Peter Connan
Nickname: Piet
Home Town: Kempton Park
Current 4x4: 1996 Patrol 4.5SGL
Home Language: Afrikaans
Location: Kempton Park
Has thanked: 1067 times
Been thanked: 987 times

Re: New air intake plumbing for petrol GQ's

Post by Peter Connan »

Ek het dit vanmore by Michael afgelaai.

Hopelik vat iemand dit van daar af saam rivier toe.
Mag ons ons kenniskry met lekkerkry aanhoukry.
User avatar
SJC
Patrolman 1000+
Patrolman 1000+
Posts: 3201
Joined: 23 Nov 2014 14:20
Full Name: SJC
Nickname: Fanus
Home Town: Nelspruit
Current 4x4: 4.2 GQ (TB42)
Home Language: Afrikaans/English
Has thanked: 199 times
Been thanked: 173 times

Re: New air intake plumbing for petrol GQ's

Post by SJC »

Baie dankie :salute:
1996 Nissan Patrol 4.2 SGL
User avatar
SJC
Patrolman 1000+
Patrolman 1000+
Posts: 3201
Joined: 23 Nov 2014 14:20
Full Name: SJC
Nickname: Fanus
Home Town: Nelspruit
Current 4x4: 4.2 GQ (TB42)
Home Language: Afrikaans/English
Has thanked: 199 times
Been thanked: 173 times

Re: New air intake plumbing for petrol GQ's

Post by SJC »

Just wondering.... the breather pipe that connects to the air filter box (on original setup), where does it connect to on the new setup?
Attachments
28451054-C9EA-4065-8698-15926EE3F492.jpeg
28451054-C9EA-4065-8698-15926EE3F492.jpeg (249.08 KiB) Viewed 2228 times
8045ED40-D28D-4CF1-B759-30A20D9180C0.jpeg
8045ED40-D28D-4CF1-B759-30A20D9180C0.jpeg (204.06 KiB) Viewed 2228 times
1996 Nissan Patrol 4.2 SGL
User avatar
Peter Connan
Moderator
Posts: 6017
Joined: 10 Sep 2010 07:21
Full Name: Peter Connan
Nickname: Piet
Home Town: Kempton Park
Current 4x4: 1996 Patrol 4.5SGL
Home Language: Afrikaans
Location: Kempton Park
Has thanked: 1067 times
Been thanked: 987 times

Re: New air intake plumbing for petrol GQ's

Post by Peter Connan »

Dump to atmosphere through a breather filter.

I know it's environmentally un-sound in the short term, but it carbons up the engine and thus reduces combustion efficiency and in the long term there is an argument that it might be environmentally better. It is certainly better for the life of the engine.
Mag ons ons kenniskry met lekkerkry aanhoukry.
User avatar
SJC
Patrolman 1000+
Patrolman 1000+
Posts: 3201
Joined: 23 Nov 2014 14:20
Full Name: SJC
Nickname: Fanus
Home Town: Nelspruit
Current 4x4: 4.2 GQ (TB42)
Home Language: Afrikaans/English
Has thanked: 199 times
Been thanked: 173 times

Re: New air intake plumbing for petrol GQ's

Post by SJC »

So its just hanging loose? How does the breather filter connect to the pipe? Only air coming out from engine side and not sucking air into engine? On this specific pipe.
(Sorry for all the questions just trying to understand this better - want to change the piping on my tb42).
Is this where one would connect an oil catch can?
1996 Nissan Patrol 4.2 SGL
User avatar
Peter Connan
Moderator
Posts: 6017
Joined: 10 Sep 2010 07:21
Full Name: Peter Connan
Nickname: Piet
Home Town: Kempton Park
Current 4x4: 1996 Patrol 4.5SGL
Home Language: Afrikaans
Location: Kempton Park
Has thanked: 1067 times
Been thanked: 987 times

Re: New air intake plumbing for petrol GQ's

Post by Peter Connan »

Yes, that is where one would connect a catch can. I even bought one specially, but couldn't find anywhere convenient to mount it and thus just left it. But most catch cans then connect back onto the carb air piping anyway.

So I just made a simple adapter to plug a fuel filter (used the same E13 I used for the fuel, usually the one that was actually in the fuel line for the previous service interval).

Air expands as it heats up, and contracts again when it cools down. The air that flows out through the breather is both that "expansion volume" and whatever leaks past the piston rings. After switching off, that "expansion volume" flows back into the engine through the breather.
In other words, while the car is standing, switched off and cooling down, a small volume of air will gradually be sucked back in through the breather. But it is a relatively small volume. I have never tried to calculate how much, but I would gues 1-3l over a period of several hours.
Mag ons ons kenniskry met lekkerkry aanhoukry.
Post Reply

Return to “09. Engines”

Who is online

Users browsing this forum: No registered users and 35 guests