phyodor
Hi everyone!
My first post here
So I've replaced the engine (i had a b4204t3) and it turned out later that apparently they installed a b4204s instead.
They're all the same except for the pistons heating - so I was told. The turbo (t3) engine had special jets to cool the pistons while the S engine seem not to have those.
Does anyone happen to know if thats right? And could it overheat my b4204s?
Ex850R
Welcome!
For starters they should have not done that without your consent and you have a case to take legal action because it is completely wrong and at worst could destroy itself early costing you a lot of cash that they won't help you with.
Who did the job?
Anthony
You need to research this engine difference carefully.
Typically there is more than just oil spray on pistons in the difference between a turbo and whatever they fitted.
nickm
I'm under the impression that all white block have oil squirters.
Whether they are different I don't know.
The earlier model had a different bore size B4194T
The latter model had the same bore size B4204T5
The differences that would concern me the most are in the pistons and cams.
I would say
Running that motor with the T4 ECU and Turbo risks detonation. Not over heating.
If you did not do the work talk to the people that did. What was the issue with the old motor?
nickm
The 2.0 L N/A has the squirters. You can access them from the out side by the looks of it..
nickm
I just realized your old motor was a LPT not the T4 the issues are far less.
Check the B4204S vs B4204T3 compression ratios and report back.
Ex850R
Still , if it breaks...
nickm
Yes .. but with the old motor you maybe able to create a reliable platform.
phyodor
Wow thanks guys, so many replies :)
Heres what i was able to find out:
b4204s2
engine type naturally aspirated petrol
cylinders Straight 4
capacity 1.9 litre
1948 cc
(118.874 cu in)
bore × stroke 83 × 90 mm
3.27 × 3.54 in
bore/stroke ratio 0.92
double overhead camshaft (DOHC)
4 valves per cylinder
16 valves in total
maximum power output 136 PS (134 bhp) (100 kW)
at 5800 rpm
specific output 68.8 bhp/litre
1.13 bhp/cu in
maximum torque 190 Nm (140 ft·lb) (19.4 kgm)
at 4000 rpm
specific torque 97.54 Nm/litre
1.18 ft·lb/cu3
engine construction
sump wet sumped
compression ratio 10.5:1
fuel system EFI
bmep (brake mean effective pressure) 1225.7 kPa (177.8 psi)
maximum rpm
crankshaft bearings
engine coolant Water
unitary capacity 487 cc
aspiration Normal
compressor N/A
intercooler None
catalytic converter Y
and
b4204t3
cylinders Straight 4
capacity 1.9 litre
1948 cc
(118.874 cu in)
bore × stroke 83 × 90 mm
3.27 × 3.54 in
bore/stroke ratio 0.92
double overhead camshaft (DOHC)
4 valves per cylinder
16 valves in total
maximum power output 163 PS (161 bhp) (120 kW)
at 5250 rpm
specific output 82.6 bhp/litre
1.35 bhp/cu in
maximum torque 240 Nm (177 ft·lb) (24.5 kgm)
at 1800-4500 rpm
specific torque 123.2 Nm/litre
1.49 ft·lb/cu3
engine construction
sump wet sumped
compression ratio 9:1
fuel system EFI
bmep (brake mean effective pressure) 1548.2 kPa (224.6 psi)
maximum rpm
crankshaft bearings
engine coolant Water
unitary capacity 487 cc
aspiration Turbo
compressor
intercooler
catalytic converter Y
So its the compression ratios and BMEPs are the main problem?
egads (she/her)
This may sound crazy, but did they put the turbo back on with the new engine?
phyodor
Yes, they did put it back!
And it runs twice faster compared to the old motor :))
(the old one was half dead though)
egads (she/her)
And definitely b4204s rather than b4204s2 or b4204s3? An 02 would have vvt wouldn't it? Sorry if I only come with more questions.
phyodor
I think its b4204s2 because i do have a VVT and the motor itself fitted alright - everything is the same on the outside. but i cant what differs on the inside of the motor
phyodor
BTW how can i check the model of the engine? Is it marked somewhere on the engine or will i see it in VIDA or something ?
egads (she/her)
nickm
If it is running fine, Run it on 98 or E10 if you can.
Grab a cheap OBD2 blue tooth dongle get "Torque" for android of something similar and keep an eye on the AFR's.
If something more was astray it would have thrown a code.
If your AFR look weird then
Tell your mechanic to swap the cams from the T3 to your "new" motor like he should of in the first place.
If not live with the extra power the NA ones will give :) ....
Not much you can do about the CR, hence the 98
I would not be concerned about the oil cooling.
I think the ECU will learn the new Compression ratio...You may not get 4000,000 km from it but probably more issues before the motor will arise.
phyodor
Egads, thanks a lot, that should bring confidence to what engine i got!
Super thanks for your help, Nicko!
Could you please specify:
what value or dynamics of the AFR is considered wired?
What are cams? :) im not strong enough in english )
Maybe there's a way to precisely decrease the CR - like a fatter cylinder head gasket?
Is there a way to manually adjust\relearn the ECU for the new CR?
Ex850R
This sounds OK , don't worry about the CR and the ECU should be fine.
Afrs do need to be checked.
Assuming they used the injectors off old motor .too.
phyodor
Snoopy, thanks for the reply!
Not sure about which injectors they used - i assume they're new, coz they're placed inside the engine block right?
And the ECU is from T3 for sure.
I heard about 14.7:1 AFR for petrol engines, but about turbocharged?
nickm
Hi I'm not trying to be obscure just some "google " terms.
Cam ... camshaft eg. static compression vs dynamic compression
AFRs .. I'm not knowledgeable enough to know what would be ideal for this set up ...but under "WOT" it should be be 12 or so... rich is okay.
As snoopy said if the intake manifold came from the old motor all is fine. I would think that would be the case. You could check and spook the mechanic :)
The ECU is self learning don't worry enjoy.
There are a lot of people using NA cams to increase the performance of a turbo motor.
Enjoy the increased performance. Watch AFR's do not go above 13 when you have your foot flat to the floor.(wot)
