912 ULS Oil Leak

Re: 912 ULS Oil Leak

by ERNEST BITTEN » 10 years ago

ERNEST BITTEN

7 37 81

I hesitate to mention this but are you sure you are not over filling your oil tank? I went through a similar witch hunt when I first started changing my own oil. On my REMOS the oil will over flow when the engine is hot and the air flow around the engine will make oil appear in all kinds of strange places on the engine. At one point I was convinced the leak was where the valve rod guide tubes were pressed into the block. Just sayin.

Re: 912 ULS Oil Leak

by Ron Greene » 10 years ago

Ron Greene

5 30 0

Thanks Ernest but no it is not due to overfilling the oil tank.

Oil is leaking from the base of the cylinder stud, traveling along its length and leaking at the cylinder head/cylinder junction. This has been confirmed by teardown.

Ron

Re: 912 ULS Oil Leak

by Ron Greene » 10 years ago

Ron Greene

5 30 0

Reinstalled #3 cylinder with Loctite 598 on the stud threads that were leaking. Poor weather today, did three 20 minute ground runs with no leaks found. Will fly as soon as weather permits and give results.

Thanks all,
Ron

Re: 912 ULS Oil Leak

by Roger Lee » 10 years ago

Roger Lee

131 5.38k 5.44k

Hi Ron,

598 has a tack setup time of 30 min. with a full cure time of 24 hrs.
Did you wait a day before running the engine?

Loctite 598
This black silicone gasket maker forms a high-quality gasket that seals the space between matched parts to prevent leakage of automotive fluids and gases. It meets manufacturers' specifications for original equipment.
Features:
Seals joined parts in automotive systems - prevents leakage of antifreeze, air, oil and transmission fluid
Meets manufacturers' warranty requirements
Resists oil better than other silicone gasket makers
Won't interfere with sensors
Won't corrode
Resists vibration
Made in the USA


Specs:
Quantity: 2.7-fl oz tube (80 mL)
Tack-free cure (time required to dry past tacky state): 30 minutes
Full cure (time required to reach full set): 24 hours
Temperature range (endurance limits of the gasket maker): -75 F to 625 F
Ideal gap-filling capacity (gap sizes in which gasket maker performs best): 0.001" to 0.125"
Maximum gap-filling capacity (maximum gap size between joined parts): 0.240"


Applications: Valve covers, oil pans, timing covers, water pumps and thermostat housings

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Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Re: 912 ULS Oil Leak

by Ron Greene » 10 years ago

Ron Greene

5 30 0

Actually waited 3 days between 598 application and first start. Company from out of town forced a work stoppage.

Ron