stgdz
TY 4 Stroke Junkie
- Joined
- Mar 27, 2021
- Messages
- 662
- Age
- 46
- Location
- Buffalo MN
- Country
- USA
- Snowmobile
- 19 tcat, 15 4000 RR, 13 800 RR
So I'm going to start the process this week of figuring out this thing but I'm kinda stuck and dreading it. Since its an oil cooler, does aoil run through the lines or those two openings on the back side of the cooler. I think either that o-ring failed or the cooler itself failed.
My plan was to drain the oil, pinch the lines, and remove the cooler and inspect the o-ring. I don't want coolant running into my motor.
I stole this image from ebay.
My plan was to drain the oil, pinch the lines, and remove the cooler and inspect the o-ring. I don't want coolant running into my motor.
I stole this image from ebay.
Turboflash
Lifetime Member
- Joined
- Mar 18, 2019
- Messages
- 2,552
- Location
- Southern MN
- Country
- USA
- Snowmobile
- '17 ZR9000 Ltd. 137 - PEFI Stage 4
Coolant through hoses. Oil through openings. Just pressure (or vacuum) check hoses. Should be no leakage.
super1c
Moderator
- Joined
- Apr 10, 2010
- Messages
- 957
- Age
- 53
- Location
- Freeland - Otsego lake, MI
- Country
- USA
- Snowmobile
- 22 sidewinder LTX-LE
Just had same part fail, replaced under warranty. Only symptom was empty overflow bottle every few rides. Must have been leaking under pressure only. Never saw coolant on floor. Dealer said o ring failed but Yamaha just warranty whole part.
number1kyster
TY 4 Stroke God
My SW recently started leaking coolant on the garage floor. I tore it down and found the clamps on either side of the oil cooler were loose, especially the turbo side. I won’t know until tomorrow if this fixed the leak.
Turboflash
Lifetime Member
- Joined
- Mar 18, 2019
- Messages
- 2,552
- Location
- Southern MN
- Country
- USA
- Snowmobile
- '17 ZR9000 Ltd. 137 - PEFI Stage 4
It's very common and virtually guaranteed there are or will be loose clamps on these sleds. It's important to go over them at least once per year, including all the ones that are a PIA to get to or even see. Examples are little hose connecting right side heat exchanger to front exchanger, oil cooler lines, turbo coolant hoses, all those that attach to thermostat housing, coolant line that connects to the outlet housing for the head, etc. It's not fun to get at them all but very necessary. Every 998 that hadn't been gone over already has loose clamps.
stgdz
TY 4 Stroke Junkie
- Joined
- Mar 27, 2021
- Messages
- 662
- Age
- 46
- Location
- Buffalo MN
- Country
- USA
- Snowmobile
- 19 tcat, 15 4000 RR, 13 800 RR
That oil cooler was a pain to get at. I pressure tested it for about 15mins and found no leaks.
What should we torque the clamps to? I stripped my lower oil line and am getting a new one.
What should we torque the clamps to? I stripped my lower oil line and am getting a new one.
I was checking my hose clamps yesterday and luckily noticed a split in the hose that runs from the thermostat housing to the exhaust side reservoir. It has not been leaking yet but would have only been a matter of time before it let go and sprayed antifreeze all over the engine.
Something else to keep an eye on.
Something else to keep an eye on.
good catch!
I wish I had caught it earlier as I had the cooling system completely drained in the spring to install the BOP extra rad kit....now I have to mess with anti freeze again.
Oh well better now then finding out the hard way on a trail ride.
Those vacuum fillers for cooling systems are like a magic trick. One second we are watching the gauge for leaks in the coolant lines, hit the lever to fill and literally a few seconds later the system was full.
