Toyota 1KZ-TE EGR Valve Removal Blanking Plates

[zed]

*sigh*

That won't happen. Egr has no effect on maximum cylinder temperatures.

[Gyxx]

OK... If you say so ...

Merry Christmas..

[KIWI_TERRANO]

Here a spanner in the works, a guy did a scientific research on the 1kz and found that if you use factory toyota bloody coolant you want have any issues! Confused i am

[zed]

Yep all the 1kzs I've rebuilt have always run genuine coolant. There are two different types, I always run the older one. I think I paid $70ish for the last 4L pack. I also run genuine thermostats and sealing rings, and definitely genuine cylinder heads (new model thick casting). Never had a problem and mine work hard towing heavy offtoaders and racecars around the place.

[Gyxx]

Hi Kiwi Terrano When you said this chap's research concluded that if you use factory coolant "you won't have any issues". Did you mean issues with heads cooking themselves?

[tweake]

Here a spanner in the works, a guy did a scientific research on the 1kz and found that if you use factory toyota bloody coolant you want have any issues! Confused i am

this post may be of interest. http://www.toyotasurf.asn.au/forum/view ... =6&t=33794

Hi guys,

Thought I would share some info with everyone, in relation to coolant colour for the older surfs, 89 96.

In the early days every one used green ethylene glycol, its anticorrosive properties contained chemicals that where inorganic.

Toyota introduced an organic anti corrosive product that was added to the mix, this organic introduction improved the anticorrosive life of the coolant, but it still had to have the inorganic properties that protected the metals for that era, this is known today as a Hybrid coolant, Hybrid Additive Technology, (HAT) designed for engines in the original green coolant era.

Toyota in its wisdom changed the new hybrid coolant to red, Toyota red is a hybrid coolant, but others kept the colour green.

The industry soon favoured the new organic anti corrosive properties, which where far longer lasting than the old inorganic types, and a totally new anticorrosive product came about, Organic Additive Technology (OAT).

New vehicle's metals, gaskets etc. where designed around the new (OAT) system, and a new colour dye was created not to confuse the consumer, today this colour is mainly red. not suitable for our green surfs.

If you currently use Toyota red coolant and decide to change to another brand, Be warned Toyota red is not an industry standard colour, it belongs in the green section of Hybrid coolants.

[zed]

The two versions for sale in nz from yota are pink and red. Pink is suitable for our old 1kzs, red is not (from the horse's mouth).

[Sheepy]

Hey mate, still got them for sale?

[wootwoot]

so having a 97 intercooled surf ( 1kz ) is it worth going to the extent of removing EGR?.. i got quite confused reading all of the past comments, but at the same time i dont mean to start the whole 100 page novel again .. lol

[kaupoi]

Off topic a bit but can the egr be removed off the 1kd's?

[zed]

so having a 97 intercooled surf ( 1kz ) is it worth going to the extent of removing EGR?.. i got quite confused reading all of the past comments, but at the same time i dont mean to start the whole 100 page novel again .. lol

Haha yeah get rid of it and reroute your pcv (crank breather). While you're at it take the intercooler off and soak it in degreaser. Its quite incredible how much oil will be in there...

If you can, take the intake manifold off and clean it out...your engine will appreciate being able to breathe again

[zed]

Off topic a bit but can the egr be removed off the 1kd's?

according to the boys at pradopoint:

The 1KD has a variable high press turbo which is mechanically adjusted via an electronic solenoid which is solely controlled by the ECU (Electronic Control Unit) to improve the spooling of the turbo depending on engine rpm.

IF this doesn't make things harder to by-pass the EGR system then what follows will! The 1KD does not have a simple system like on the 1KZ's but rather a system where the turbo boost is sent BACK through the EGR cooler on the same path in-order to dump the access turbo boost back into the exhaust. (EGR valve in the intake throat opens to let exhaust gases in but also opens to let access turbo boost out).

I read that as a no...your power and economy will suffer otherwise...

Personally I would rather have a 4M41 or a 1kz any day

[kaupoi]

Wow, cheers for that.

[mudbugga]

The two versions for sale in nz from yota are pink and red. Pink is suitable for our old 1kzs, red is not (from the horse's mouth).

Sorry old thread I know, but this info from zed is incorrect.

I work for Toyota so can confirm the following regarding the Toyota genuine coolants.
Toyota Long Life Coolant (RED STUFF, CONCENTRATE) is for vehicles PRE 2000. Comes in 1L and 4L containers.
Toyota Super Long Life Coolant (PINK, PREMIXED 50:50) is for vehicles POST 2000. Comes in 4L containers.

You cannot mix the coolants together.

[tweake]

IF this doesn't make things harder to by-pass the EGR system then what follows will! The 1KD does not have a simple system like on the 1KZ's but rather a system where the turbo boost is sent BACK through the EGR cooler on the same path in-order to dump the access turbo boost back into the exhaust. (EGR valve in the intake throat opens to let exhaust gases in but also opens to let access turbo boost out).

no offense but i call BS on that.
there is very few times where boost pressure is above exhaust back pressure and its when your off throttle. for a fraction of a sec boost may be higher but it won't be long enough to push back through the pipework.

with variable turbos the turbo itself is what controls a lot of the egr flow. the vanes close to increase back pressure to force more egr through. the egr flow (bleeding off the back pressure) is what stops the turbo from spinning up even more. so block the egr and turbo will spin up fast due to the increase in exhaust back pressure and can cause overboost.
usually the ecu monitors the egr flow via the amount of air flow. it expects to see a drop in air flow when egr valve opens. if it dosn't see it it can log fault and even go into limp mode.

with vacuum operated variable turbo's you can take ecu control away from the turbo to get around overboost issues. electronic motor controlled turbo's will a lot harder to bypass.

best way is to reduce egr flow so the ecu doesn't flag an error.
soot production goes up exponentially with egr flow increase. so reducing egr flow a small amount can reduce soot production a lot. less soot = less fouled up intake.

[fourrunner]

does anyone have a diagram on the pipes / breathers for the egr on 1kz?
i have a 94 hilux surf looking to remove egr properly and put a intercooler on at the same time
cheers

[bacon 1]

The two versions for sale in nz from yota are pink and red. Pink is suitable for our old 1kzs, red is not (from the horse's mouth).

Sorry old thread I know, but this info from zed is incorrect.

I work for Toyota so can confirm the following regarding the Toyota genuine coolants.
Toyota Long Life Coolant (RED STUFF, CONCENTRATE) is for vehicles PRE 2000. Comes in 1L and 4L containers.
Toyota Super Long Life Coolant (PINK, PREMIXED 50:50) is for vehicles POST 2000. Comes in 4L containers.

You cannot mix the coolants together.

Thanks Mudbugga for your post, makes it easier to follow which coolant to use.

[zed]

The two versions for sale in nz from yota are pink and red. Pink is suitable for our old 1kzs, red is not (from the horse's mouth).

Sorry old thread I know, but this info from zed is incorrect.

I work for Toyota so can confirm the following regarding the Toyota genuine coolants.
Toyota Long Life Coolant (RED STUFF, CONCENTRATE) is for vehicles PRE 2000. Comes in 1L and 4L containers.
Toyota Super Long Life Coolant (PINK, PREMIXED 50:50) is for vehicles POST 2000. Comes in 4L containers.

You cannot mix the coolants together.

Thanks Mudbugga for your post, makes it easier to follow which coolant to use.

Eeps sorry about that bought heaps of it too i should know...!

[zed]

IF this doesn't make things harder to by-pass the EGR system then what follows will! The 1KD does not have a simple system like on the 1KZ's but rather a system where the turbo boost is sent BACK through the EGR cooler on the same path in-order to dump the access turbo boost back into the exhaust. (EGR valve in the intake throat opens to let exhaust gases in but also opens to let access turbo boost out).

no offense but i call BS on that.
there is very few times where boost pressure is above exhaust back pressure and its when your off throttle. for a fraction of a sec boost may be higher but it won't be long enough to push back through the pipework.

with variable turbos the turbo itself is what controls a lot of the egr flow. the vanes close to increase back pressure to force more egr through. the egr flow (bleeding off the back pressure) is what stops the turbo from spinning up even more. so block the egr and turbo will spin up fast due to the increase in exhaust back pressure and can cause overboost.
usually the ecu monitors the egr flow via the amount of air flow. it expects to see a drop in air flow when egr valve opens. if it dosn't see it it can log fault and even go into limp mode.

with vacuum operated variable turbo's you can take ecu control away from the turbo to get around overboost issues. electronic motor controlled turbo's will a lot harder to bypass.

best way is to reduce egr flow so the ecu doesn't flag an error.
soot production goes up exponentially with egr flow increase. so reducing egr flow a small amount can reduce soot production a lot. less soot = less fouled up intake.

all good I didnt write any of that so I didnt know - but the later 1KDuhs have a carbon sensor dont they? so reducing EGR is going to mess with the pooter and the running of the engine at it's best...

Definitely rather have a 1KZ...lol

[jimmyh]

Have got a !KZTE in a KZN130 1994 Surf Auto. 314000km.

have read this thread and am about to ditch EGR, etc. couple of things though. where do i reroute the PCV? and is there a possibilty that hard starting can resullt from any of the problems associated with EGR issues?

I have had the glow plugs checked, Spill valve replaced, ECU replaced, check valve on tank side of fuel filter pump, Oil and filter change.
problem is its hard to start both hold and cold. takes anywhere between 6 to 12 or more cranks to fire. once its started it pumps. idles perfect. no smoke issues whilst on the rd only grey smoke once started. Doesnt miss a beat just done 4000km without a hitch apart from the hard start.

any ideas??

[tweake]

problem is its hard to start both hold and cold. takes anywhere between 6 to 12 or more cranks to fire. once its started it pumps. idles perfect. no smoke issues whilst on the rd only grey smoke once started. Doesnt miss a beat just done 4000km without a hitch apart from the hard start.

any ideas??

can be a few things.
one is air being sucked into the pump and forms a bubble after it sits. takes a bit of cranking to suck it through. try priming the fuel filter before starting.

injection pump timing. while there is no actual physical pump timing, as its ecu controlled, the ecu has a set timing advance on start up. once started it then corrects the timing. so people have found advancing the pump (bit of slop in the mounting bolts) helps with hard starts. at worse check the timing belt/chain/gears are set correctly.

whats it like starting with foot hard on the throttle ?

the other i've heard of is to much blowby coming through the breather and fills the intake. try it with the breather disconnected.

[jimmyh]

thks tweake. timing belt etc set up right. will try with foot throttle hard and advance pump slightly. by breather do you mean the one from the turbo into the rocker?

[tweake]

by breather do you mean the one from the turbo into the rocker?

yes

[jimmyh]

yeah tried advancing the timing and the breather still no change. next step is looking at swapping injector pump and checking injectors so we'll see how that goes. whats confounding issues is the surf goes really well once its started. no smoke, no missing of any kind?

[tweake]

if you pump the fuel filter primer, how many pumps till it goes hard ?

[lax2wlg]

how many pumps till it goes hard ?

[tweake]

how many pumps till it goes hard ?

i said pumps not strokes

[lax2wlg]

how many pumps till it goes hard ?

i said pumps not strokes

Couple a good solid strokes, prime her up and pre heat the oven. I mean... um... something about glow plugs

[jimmyh]

hey tweake takes about 2 to 3 pumps at most.

[tweake]

hey tweake takes about 2 to 3 pumps at most.

sounds ok. does it start any easier after that?