Ask Xulfiqar - An Automotive Encyclopedia

[Xulfiqar]

Bump..

subaru used the core design but changed a lot, e.g. EF10 uses a balancer too. The good thing is that it has forged rods and pistons but you cannot mickey mouse a suzubaru out of it.

[Xulfiqar]

Completing 3 years, this thread has over 200,000 views, 6600 replies and 1100 likes

@Xulfiqar :

- Thank you for helping us all
- May Allah reward you for ur efforts and bless this country with more people like u .. Ameen

Thank you.

[usmanqadeer.education]

I'm not sure to be honest as I bought it used.
Mechanic was suggesting to change Exhaust so I guess CAT converter was removed by previous owner possibly.
In case if not, Then what should I do Sir?

Seeking fir your ans Sir

[Xulfiqar]

@Xulfiqar, i have recently bought a brand new generator with a perkins engine, its a 2.2 litre 4 cylinder diesel engine and water cooled with a belt driven fan. genset produces 22-25kva. it has the electronic display showing all engine parameters (oil pressure, battery and charging voltage, rpm etc).

the issue is the coolant temp never goes above 55C even if left for 4-5 hours running, it takes about 10 min for it to get to 54-55 and it stays there so far. How to know whether this engine has a thermostat in place or is it even functioning. or do diesel gensets that run at a constant 1500rpm never go above this temp?

further more the official distributor knows nothing about it and is technically pretty dumb. initially said to only let them service the engine and they were using 15W-40 ZIC engine oil and even overfilled it after the first initial oil change saying overfilled oil is good for new running engine as it will consume and settle down bla bla, and when i said they can get lost and i will do all oil and filter changes myself they said warranty may be void etc but when i asked them to show me where in the service sheet it was written to use this oil to overfill they looked through the space sheet and it actually said to use 5W-30 or 10W-30 engine oil but they said no thats for uk not here.

further howto know if this engine even has glow plugs, although the spec sheet says it has but when you touch the button it starts almost immediately and there is no seperate indication for glow plugs though it has no trouble starting yet.

so is it fine to let it run at 50C or something should be done about it?

currently i am using mobil delvac 1 5W-40 synthetic and mobil 1 coolant is that okay? initial hours were completed on factory filled oil whatever it was and a little hours on 15W-40 before i changed it. oil filter is OEM perkins

it takes a bit over 10 litres of engine oil and 7.5 litres of coolant. manual says oil and filter change intervals are 500 hours dependant on load factor, but isn't that too excessive?

your genny may have a 65C thermostat in it which regulates it to 55C throughout. Good idea to kick the "so called service techs" out - a few more Q/A sessions and you would have had deaths on your hands. 500 hours is because its a small engine running 10 litres of engine oil at constant load. Mind you that oil changes are severely shortened if your engine operates for short time only. That is why an oil heating system is implemented or a thinner flowing oil is used to ensure quick start and immediate lubrication - as gennys start and ramp up to full power under a few seconds.

yours wont have glow plugs, I believe perkins use a heated matrix or even fire element in the inlet manifold that helps in starting the engine.

[Xulfiqar]

Yes you're right boss, fork and my mechanics CHOTA is the culprit, Mr. CHOTA did not check the fork before installing the clutch bearing.

Its quite funny - your mechanic did not see this thing broken while he was changing the clutch thrust bearing. He might need thick glasses.

[Xulfiqar]

That is quite an achievement, well done Mr. xulfiqar, this is amazing work, you probably helped dozens of bakras get saved from being zibbahed . Thank you for your time and effort, if there is ever a chance for any of us to help you out in return, do let us know.

Sent from my HTC One using PW Forums mobile app

Thank you.

[Mirza967]

@xulfiqar Aoa......sir i want to ask just for knowledge that what is the purpose of a small hole in exhaust port of 2 stroke...mechanics usually dont clean it as its usually clogged....i am talking wid reference of yb100.

[siraj_7]

For the love of God dont let such mechanics install or work on A/C units.

To follow the pressure and temperature chart you need two thermocouples, one on each line to measure line temperature then you look up that temperature on the chart and calculate superheat and subcool to fine tune the system.

For your gauge jumping to 150 when charging up, its normal because the gauge is seeing cylinder pressure when the valve opens (high pressure goes to low - thats how charging takes place) It will show line pressure when the cylinder valve is shut.

The pressure is sort of useless if you dont know the actual weight of the charge in the system OR you dont have thermocouples to test line temperature. Its a hawaee fire style gas charging system that works less than 2% of the time. Charging with correct tools and methods results in perfect charge 100% of the time.

Did this person also perform a vacuum on the system or just connected some pipes up and said "set hai gess daaldo" - if he did then your gas is now adulterated with "air" which is useless for refrigeration.

Bro you are right.. the sub cool and super heat method is too advance... I had to go through a lot of humilation and finally found somebody with vacuum pump... we vacummed the system for 25 minutes with a 1.5ton ac compressor and then charged it to 65psi. The ac doesn't cool. He came again today and took the ac off for bench testing in his shop. The ac runs between 50 to 65 psi and shoots to 150 during running and draws 7.2 ampres. Its a 1.5 ton Panasonic PC-18mfk. Installed it 2 years back with extra dryer on liquid line and with vacumming but in 2 years it developed 20 leaks in the evaporator last season. Just got that fixed and recharged with vacuming to 65psi but not cooling and now lets see what they do? They say the card might be the culprit.

The ac runs for few minutes then shuts off. The evaporator coil is hot as room temprature and only very top part of it gets cold. I think maybe the evap got blocked during fixing of leaks maybe.. Is it normal to draw 7.2 amp for it at 50-65 psi working range? What could be the culprit?

Edit: I read the service manual of a similar series model and it said that shutting off ac is a saftey feature as when the sensor on the evaporator senses that the evaporator temp is not getting cold enough during ac working then it shuts the compressor and restarts it after a while. Again if it doesn't get cold then it shuts ac for good and gives orange beeps. However the shop keeper doesn't understand it. Lets hope he is able to find the problem. Need you guys prayers so this white elephant starts to work again...

[overspeed111]

Sir i need your help as i mentioned problem in my earlier post that the gear they installed get stuck in neutral while downshifting from 4th to 3rd all other downshifts works fine and upshifts too (cultus G10a 5 speed gear box installed and previous MX17 automatic was removed)
today i went to a mechanic nearby my home he says that the gear is culprit get it replaced as he gave me 10 days warranty.

[Xulfiqar]

Bro you are right.. the sub cool and super heat method is too advance... I had to go through a lot of humilation and finally found somebody with vacuum pump... we vacummed the system for 25 minutes with a 1.5ton ac compressor and then charged it to 65psi. The ac doesn't cool. He came again today and took the ac off for bench testing in his shop. The ac runs between 50 to 65 psi and shoots to 150 during running and draws 7.2 ampres. Its a 1.5 ton Panasonic PC-18mfk. Installed it 2 years back with extra dryer on liquid line and with vacumming but in 2 years it developed 20 leaks in the evaporator last season. Just got that fixed and recharged with vacuming to 65psi but not cooling and now lets see what they do? They say the card might be the culprit.

The ac runs for few minutes then shuts off. The evaporator coil is hot as room temprature and only very top part of it gets cold. I think maybe the evap got blocked during fixing of leaks maybe.. Is it normal to draw 7.2 amp for it at 50-65 psi working range? What could be the culprit?

Edit: I read the service manual of a similar series model and it said that shutting off ac is a saftey feature as when the sensor on the evaporator senses that the evaporator temp is not getting cold enough during ac working then it shuts the compressor and restarts it after a while. Again if it doesn't get cold then it shuts ac for good and gives orange beeps. However the shop keeper doesn't understand it. Lets hope he is able to find the problem. Need you guys prayers so this white elephant starts to work again...

if only part of the evaporator is icing up - the system is severly low on charge. Does the unit use a TXV or have capillary tubes? - and 20 leaks? what oil was being used in there did it become acidic? - was the unit flushed out before install?

[Xulfiqar]

Sir i need your help as i mentioned problem in my earlier post that the gear they installed get stuck in neutral while downshifting from 4th to 3rd all other downshifts works fine and upshifts too (cultus G10a 5 speed gear box installed and previous MX17 automatic was removed)
today i went to a mechanic nearby my home he says that the gear is culprit get it replaced as he gave me 10 days warranty.

the shift fork detents are damaged in the gearbox.

[overspeed111]

the shift fork detents are damaged in the gearbox.

Thank you sir i ll take it tomorrow for gear change again (the mechanic already charged me 5000 for this job,now again he ill charge me for this, and i also poured in good oil in it, 1500 for gear lever assembly,1000 for starter motor, 8000 for gear, 1500 for clutch padel assy, 500 for clutch wire and 1000 for lathe worker for rebuilding axles)
he had that MX 17 gear box too now what to do stick to this or shift back to MX 17 automatic (with TCU but no wiring for 5000 rs) really confused.

[DUDE007]

@xulfiqar i recall you saying that if brake pads are sanded for cleaning, they have to be burnished again. Is it possible to do that for brake pads that have not been properly broken in?

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Bump

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[siraj_7]

if only part of the evaporator is icing up - the system is severly low on charge. Does the unit use a TXV or have capillary tubes? - and 20 leaks? what oil was being used in there did it become acidic? - was the unit flushed out before install?

Yes I purchased it new and flushed it with nitrogen, installed extra dryer on liquid line and pulled vacuum before installing. But it developed leaks in year 2 after install. Is 50-65psi is severely undercharged at the suction line? At this pressure and 7.2amps the evaporator is getting only cooled at the top area, the rest of it is as hot as the room temperature. He took the evap again for bench testing and will return today

Not sure about TXV and what it is, the model is Panasonic PC-18MKF (1.5 Ton)

Should I send you the photo of inside the outer unit? The inner unit is simple with just the evaporator inside and couple of sensors.

I have no heard that there is a lot of complain in this ac.

[haider_ciit]

@ Xulfiqar
Aoa sir suzuki atf 3314 is not available pls suggest some alternative for it for alto 2008 660c thankyou

[Xulfiqar]

Yes I purchased it new and flushed it with nitrogen, installed extra dryer on liquid line and pulled vacuum before installing. But it developed leaks in year 2 after install. Is 50-65psi is severely undercharged at the suction line? At this pressure and 7.2amps the evaporator is getting only cooled at the top area, the rest of it is as hot as the room temperature. He took the evap again for bench testing and will return today

Not sure about TXV and what it is, the model is Panasonic PC-18MKF (1.5 Ton)

Should I send you the photo of inside the outer unit? The inner unit is simple with just the evaporator inside and couple of sensors.

I have no heard that there is a lot of complain in this ac.

nitrogen is used for purging, not flushing - flushing is done with a liquid like acetone or CTC or similar. To see real problems you need to measure the high side pressure of the running system. Its impossible to detect and anomaly with just a low side gauge, Replace your mechanic if he doesnt know whats going on.

btw - make sure the drier you placed in the liquid line is not choked or damaged as that can cause high load on the compressor with bad heat exchange in the evaporator (it will starve the evaporator - which will show up as low cooling on partial evaporator surface)

I find it odd that your mechanic cannot find the problem, its very simple analysis with correct tools. Why doesnt he use a high side gauge? Every split A/C unit has a high side connector port near the block valves.

[Xulfiqar]

@ Xulfiqar
Aoa sir suzuki atf 3314 is not available pls suggest some alternative for it for alto 2008 660c thankyou

JWS 3314 is not sold in Pakistan as this car is not for Pakistani market, a substitute you can use is a multivehicle ATF sold by liqui moly or meguin or valvoline etc.

[haider_ciit]

thanks for replying sir... what should be the quantity and viscosity

JWS 3314 is not sold in Pakistan as this car is not for Pakistani market, a substitute you can use is a multivehicle ATF sold by liqui moly or meguin or valvoline etc.

[Xulfiqar]

thanks for replying sir... what should be the quantity and viscosity

measure what drains out - adjust quantity by measuring dipstick. There is no viscosity to be measured, its only ONE product.

[zahidsandhu223]

Aoa Xulfiqar Bro... I have Vitz 2009 Model. I changed its Plugs With NGK IRIDIUM LFR6AIX - 11
I am so Worried coz Original was DENSO IRIDIUM SK20HR11.
Now what I should do. Please Help me