breather

G

Guest

Guest
Hi Guys
The old brain was thinking again and I would like to know something.
There is a breather coming from the engine to the air intake which allows
for gases/fumes to escape from the engine.
My question is this, if the Gases/fumes are going into the air intake do
they then go into the turbo and where then, back into the engine.???
Cheers
john
92HDJ 80 1HDT
 
G

Guest

Guest
Hi John,
Yes. This is just the sump/block breather and is standard on most engines.
Some oils can get a bit frothy resulting in the inlet pipes getting covered
in a fine film of oil, but this isn't normally much of a problem although
on older intercooled cars it is worth taking off all the hoses and the
intercooler core and cleaning them out to help improve the cooling.
--
Regards,
Julian Voelcker
Mobile: 07971 540362
Skype: julianvoelcker
Cirencester, United Kingdom
1994 HDJ80, 2.5" OME Lift
 
G

Guest

Guest
Hey Julian
thanks, so is the air from the engine recurculated all the time with more
from the air intake. Where does the old air go to.
cheers
john 92HDJ 80 1HDt
 
G

Guest

Guest
Hi John,
It's not really recirculating the air, just providing a mild negative
pressure to clear any fumes.
The amount of air movement increase when you get worn bores/piston rings -
one of the ways to check if you have worn bores/piston rings is to remove
the oil filler cap and feel for a big change in pressure as the cylinders
fire - when then cap is on these pressure changes are funnelled through the
breather and the 'old' air that is forced out is drawn up into the air
intake and into the engine combustions chambers/pistons with new air on the
reverse stroke being drawn from the fresh air being sucked into the engine.
Sorry, not the easiest thing to describe.
--
Regards,
Julian Voelcker
Mobile: 07971 540362
Skype: julianvoelcker
Cirencester, United Kingdom
1994 HDJ80, 2.5" OME Lift
 
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G

Guest

Guest
Two posts in the day and not wanting to confuse John but although your
description covers most engines...... on some early petrol cruisers (and
perhaps later models) the system operates in two modes.
as your description with the fumes being fed into the intake before the carb
on idle and over-run
but on heavy load and acceleration the fumes are fed into the inlet after
the carb. This can cause no end of problems on worn engines particularly if
the valve that changes the operation gets stuck, belive me!
I only mention it because I had never come across this particular emissions
control variation before I had to get my FJ45 with a 2F to idle.
Malcolm
Malcolm Bagley
Stafford, UK
1975 FJ45 Pickup (In Work)
_______________________________
-----Original Message-----
From: [Email address removed] [mailto:[Email address removed]] On
Behalf Of Julian Voelcker
Sent: 09 May 2006 12:31
To: [Email address removed]
Subject: Re: [ELCO] breather
Hi John,
It's not really recirculating the air, just providing a mild negative
pressure to clear any fumes.
The amount of air movement increase when you get worn bores/piston rings -
one of the ways to check if you have worn bores/piston rings is to remove
the oil filler cap and feel for a big change in pressure as the cylinders
fire - when then cap is on these pressure changes are funnelled through the
breather and the 'old' air that is forced out is drawn up into the air
intake and into the engine combustions chambers/pistons with new air on the
reverse stroke being drawn from the fresh air being sucked into the engine.
Sorry, not the easiest thing to describe.
--
Regards,
Julian Voelcker
Mobile: 07971 540362
Skype: julianvoelcker
Cirencester, United Kingdom
1994 HDJ80, 2.5" OME Lift
 
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