[DIY] Automatic Gearbox Cooler

[Izso]

Thanks. I'm using the same as you now. But am just not willing to take the risk of it failing one fine day, and there goes my whole gearbox. I guess you could call me chicken

---------- Post added at 07:27 AM ---------- 6 hour anti-bump limit - Previous post was at 07:22 AM ----------



No, I havent checked PH Auto. I will if I can find some time.

Indeed, if you can find it at your shop, and it's a proper transmission oil hose (I assume there's only one size) then I do need 3m (for 2 cars). Willing to pay you for your costs. That's very nice of you.

let me check with them this week, have to see my work schedule. I'll let you know via PM.

 

[sarled]

errr...not really....

because the power steering unit also uses exactly same hose... (power steering also have pump that operate according to engine rpm and working under pressure as well as temperature)

and i've seen none of power steering hose gone burst unless the hose grinding with engine pulley nearby

p/s: when u cut through the hose u'll probably already noticed that the hose even tough was fully rubber hose, still have "braided" layer inside

Thanks. Yeah, I guess so you have a point. Gives me some confidence to continue running it on the fuel hose for now. But as soon as I find the correct transmission oil hose, I'll change it. It's not so much pressure I am worried, it's temperature. Fuel hose rated to 70 deg C only. Anyway, like I said earlier, I'm chicken....:trytofly:

 

[Izso]

Btw, I checked with the shop I go to and they are currently out of stock. Will let you know once I revisit them with the new stock

 

[Wilson13B]

Bro Izso , do you know which hose is carry oil out from the box ?

Thanks for any advance =)

 

[Izso]

Bro Izso , do you know which hose is carry oil out from the box ?

Thanks for any advance =)

I had to guess! You need someone else at the driver seat to be ready to start and stop the car engine. Unplug one of the hoses and keep it inside a bucket to collect oil. Startup the car and see if the ATF is rushing out (quickly switch off your car after checking), if it's not - then it's the other hose.

 

[sarled]

Just drive car like normal. Then when parked, quickly shut engine and open the boot. Touch with hand which hose is hotter. That will be your gearbox discharge (which is your cooler inlet). The other hose will of course be your cooler outlet. Don't be too slow or the heat will equalize between these two hoses.

 

[cincaluk]

hi izso, guys & sifu(s) out there,

i've done this diy on my myvi 1.3 AT several weeks back using hayden 1403 AT oil cooler.. but weird thing happen afterwards..wanted to check with you guys if you're having the same problem as me:

a) 1st start up engine in morning or late evening (after the car parked for several hours), if i didn't wait for ~5minutes before drive, the gear like refuse to enggage..there will several loud grinding sound before the gear enggaged & the car will jerk..is this normal?

b) the sound from engine bay (not sure if its the engine or gear box) sound coarse...i've just changed my engine oil & it still sound like "pasir" been grinded..eventhough the sound is not that loud, but i registered this sound just after this mod..

I've checked the oil level & all the connection, no leak..total oil used during 1st install (+ flushing etc), about 7 liter of petronas atf d3...the oil level now is bit more than the "cold" level on the stick..wonder if its not enough?

my initial (and still) thought is the hayden 1403 is too big for myvi. I think I'll try to purchase another series, which is hayden 1402 to try but not sure if this is the wise thing to do...also, if i were to change this, thought that i'll just top up the gear oil without doing anymore flushing with daihatsu atf3 oil (mix & match gear oil won't be a problem??)

Just for info. I decided to do this mod as i'm using ngv & after the last tune up, the engine feels like no power etc2..after install this, the power restores & I can use back the ngv as usual but the after effect is nagging me...

appreciate any feedback/comment from all..

thx!

 

[sarled]

No, this is absolutely abnormal. I doubt your cooler is the problem. Was there a chance that your car was running dry (without ATF) for longer than a minute? Could be an oil pump failure.

 

[cincaluk]

during the flushing, there is a time when the oil stop flowing eventhough i keep on pouring the oil in..but not sure if it has enough time to jam the oil pump..

is there any other sypmtom that i should look into if its related to oil pump?

thx

 

[Izso]

Speaking of too large, I'm taking out my ATF cooler for testing purposes. My gearbox has run low on oil before and that caused some uncomfortable noises and severe jerking since I was on the highway. Ever since then it was never the same.

In your case it sounds like the oil pump might not be working too well. Did you fill in the ATF fast enough when doing the flush? The method of flushing I recommended is dangerous if you're not fast topping up the oil. But if done correctly it's a 25 second job vs a much longer more tedious 1 hour job.

After a drive quickly try to touch your hoses in and out of your cooler. One side should be hot and the other cool. If both sides are hot it's likely the oil isn't flowing and that's a bad thing.

 

[cincaluk]

looking back, i think i didn't i fill in the ATF fast enough..they were time when i'm a bit confused & stop pouring as i can't differentiate the color of old oil & the new one..i think at that time, i just pour around 1 liter of ATF & the oil been drained looks clean, i stop pouring to look at the container while the engine still running...probably that caused the gear box running dry?

any other symptom that i should look into to confirm if its the oil pump? i'll try to check the hoses after work today...got a nagging feeling that both side are hot after i took the car for a spin after the mod...

when you say bad, how bad is bad? i'm using the car everyday travelling from seremban to KL & i'm also not a light footer

thx

 

[Izso]

Thinking back, my case was more severe than yours since I was driving with almost no oil for a good 15 minutes and it was smoking by the time I got back home. I don't think the pump is that fragile? Mine's a Myvi, whats yours? Perhaps your cooler has a clog? Suggest you take it out and have a quick check?

 

[cincaluk]

mine is myvi 1.3...hmm..i think i'll take it out this weekend & have a look. I've ordered the 1402 as well..probably i'll fit that in & install this 1403 on my other car later. is it possible that the pressure drop due to the length of oil cooler generates the problem?

I assume that after we shut the engine, all the oil will be sucked back to the sump & when we start the engine again, then will it circulate through the rest of the system..if this is the case, probably, due tot he extra length the 1403 provide, it takes time for it to circulate properly..i can try to top up the gear oil up to the hot limit of the stick & see the effect?

btw, i've yet able to check the hoses whether its hot or cold on either side after driving. will try to do it today..

thx

 

[Izso]

mine is myvi 1.3...hmm..i think i'll take it out this weekend & have a look. I've ordered the 1402 as well..probably i'll fit that in & install this 1403 on my other car later. is it possible that the pressure drop due to the length of oil cooler generates the problem?

I assume that after we shut the engine, all the oil will be sucked back to the sump & when we start the engine again, then will it circulate through the rest of the system..if this is the case, probably, due tot he extra length the 1403 provide, it takes time for it to circulate properly..i can try to top up the gear oil up to the hot limit of the stick & see the effect?

btw, i've yet able to check the hoses whether its hot or cold on either side after driving. will try to do it today..

thx

I don't think the oil will be "sucked back" into the sump. When you shut down the car the pump stops working and the oil will just 'stand still'. How big is your 1403 anyway? Take some pics la.

Btw, the correct way to fill ATF is to drive until the car is warm enough (usually about 15 mintues) then measure your ATF level. It should be between the hot and cold markers with the max being at hot. If you overfill it'll be sluggish and if you underfill it'll be jerky.

 

[sarled]

When you shut your engine the oil drains back to the sump. But the hoses will still have enough appreciable difference in temp for you to tell which one is in/out. That's why you have to be a little quick on your feet to do this.

---------- Post added at 11:18 PM ---------- 6 hour anti-bump limit - Previous post was at 11:14 PM ----------

I don't think the oil will be "sucked back" into the sump. When you shut down the car the pump stops working and the oil will just 'stand still'. How big is your 1403 anyway? Take some pics la.

Btw, the correct way to fill ATF is to drive until the car is warm enough (usually about 15 mintues) then measure your ATF level. It should be between the hot and cold markers with the max being at hot. If you overfill it'll be sluggish and if you underfill it'll be jerky.

Don't forget ATF level should be checked with your engine warmed up AND running (gear in P is safer than in N).

 

[cincaluk]

was down for few days due to flu...can't do anything on past weekened...i'll try to do it this week & take some picture on the 1403 as well..

i've touched both hoses after coming back from work...both are hot, but i noticed that the inlet hose is hotter than the outlet from oil cooler..but then, probably the outlet located really close to the exhaust manifold cover & that's the reason for it to be hot? I'll try to reroute the hoses when doing the change later..

thx izso & sarled for the feedback so far

 

[sarled]

i noticed that the inlet hose is hotter than the outlet from oil cooler..but then, probably the outlet located really close to the exhaust manifold cover & that's the reason for it to be hot? I'll try to reroute the hoses when doing the change later..

thx izso & sarled for the feedback so far

Errmmm..... that's normal. Inlet to the oil cooler must be hotter than outlet mah. Otherwise, no cooling would have taken place.

 

[cincaluk]

some update, problem seems to be 90% solved except for the bit grinding sound... I decided to just pour in another ~ 300ml gear oil last week..the 1st problem with gear not enggaging seems to be cured..I assume now that I didn't put in enough oil in the first place..

My fault was probably checking the gear oil level without the engine running. after sarled posted that i should check the level with the engine running (I normally check the level after coming back from work, immediately cut the engine off & pop the hood to check the level) the level seems to be a bit lower than "H" marking..

Now that i've run the engine possibly with low oil for the past 3 weeks, I can just assume that the grinding sound won't dissipate..probably the lack of oil has made some of the gear part permanent damaged..

anyway, this is a good lesson learnt. I will still continue to change the 1403 to my other car & install the new 1402 on this myvi & reroute the hose as well..

thx izso & sarled in guiding me to resolve this

 

[vr2turbo]

Grinding sound, try adding in Lubeguard ATF additive.....

 

[sarled]

Great. At least we solved part of your problems. Yeah, if you already made some mechanical damage you can't do much to fix it anymore. Perhaps like VR2 said, try some additives. If it's been proven by some forummers. Good luck.