300 TDI rear main seal question
- Thread starter RiftRover
- Start date
Wilboro
Well-known member
Everyone swears by Right stuff and that's what I used between the block and the seal carrier. No gasket used. Thats what turner engineering recommends.
I also used the international 2.8 rear seal with is Repotedly much better.
This is in my 300tdi defender. I assume the RRC 300 is the same...
I also used the international 2.8 rear seal with is Repotedly much better.
This is in my 300tdi defender. I assume the RRC 300 is the same...
DefendersNW
Well-known member
Later type seals are meant to be used without gasket - early ones had a gasket.
We use an aviation grade gasket maker (Permatex 80019 or 80017) for close fit applications.
We use an aviation grade gasket maker (Permatex 80019 or 80017) for close fit applications.
RiftRover
Well-known member
So how do I know if I should have earlier or later type seal? Are they interchangeable? I've already bought parts and have a gasket to go with the seal. Since this is a conversion I have no information on the age of the engine, although I'm sure its from a disco since it's in an RRC.
DefendersNW
Well-known member
What is the PN on the packaging?
DefendersNW
Well-known member
Correct - use the sealant I referenced earlier, wipe clean any excess (and keep the crank clean) and bob's your uncle.
DefendersNW
Well-known member
A touch of heat can help sometimes...
Use a puller, or fabricate one with square tube across the housing.
nas90tdi
Well-known member
To resurrect an old thread.
When I put my 300 in I replaced every seal ect. Used a LR rear main. I was super careful with it and followed the manual religiously. With the caveat that I didn't wipe the crank down with denatured alcohol or similar to make sure it was squeaky clean. I can't 100% rule out a slight oil contamination. Anyway, within a few hundred miles it started to leak. Since I have just done the install I am obviously not putting up with that.
After a lot of research I kept coming across this issue with the genuine seals leaking. I just installed a Turner seal as that seemed to get the most positive feedback globally.
Any personal experience with the Turner seal?
I am going to put the trans back in tomorrow night. It is definitely made differently and actually makes more sense to me how it seals.
And, you could eat off the crank this time. This is a pain in the ass project I don't like doing.
When I put my 300 in I replaced every seal ect. Used a LR rear main. I was super careful with it and followed the manual religiously. With the caveat that I didn't wipe the crank down with denatured alcohol or similar to make sure it was squeaky clean. I can't 100% rule out a slight oil contamination. Anyway, within a few hundred miles it started to leak. Since I have just done the install I am obviously not putting up with that.
After a lot of research I kept coming across this issue with the genuine seals leaking. I just installed a Turner seal as that seemed to get the most positive feedback globally.
Any personal experience with the Turner seal?
I am going to put the trans back in tomorrow night. It is definitely made differently and actually makes more sense to me how it seals.
And, you could eat off the crank this time. This is a pain in the ass project I don't like doing.
Ash
Active member
The Turner seal is definitely the solution, and I prefer to use them over the factory seal on every 300 that I touch. Cleaning the even polishing the crank to a degree is, as I'm sure you're now realizing, a critical step as any contamination will act as an abrasive against the face of the seal and compromise its ability to perform.
-Ash
-Ash
nas90tdi
Well-known member
Makes me feel better.
That is all I can come up with. I must have gotten a bit of oil or something on it.
I am far more confident in the Turner seal just based on how it is made. The contact surface on the LR seal is nearly non existent, so I could see how a tiny intrusion of contaminant could push it away from the crank.
I wish I had used the Turner seal initially when the engine was sitting on a cart. Definitely easier. I just hadn't researched Genuine rear main seal leak at that point. It was very informative. Seems all the newer seals are a bit suspect.
That is all I can come up with. I must have gotten a bit of oil or something on it.
I am far more confident in the Turner seal just based on how it is made. The contact surface on the LR seal is nearly non existent, so I could see how a tiny intrusion of contaminant could push it away from the crank.
I wish I had used the Turner seal initially when the engine was sitting on a cart. Definitely easier. I just hadn't researched Genuine rear main seal leak at that point. It was very informative. Seems all the newer seals are a bit suspect.
RDavisinVA
Technical Excellence Contributor
Remove the starter and tap the back of the flywheel.
Place a block of wood against the flywheel and tap it with a hammer.
Rotate the engine so as not to cock the flywheel at too steel an angle.
This will get it loose.
RiftRover
Well-known member
Well unfortunately my engine is long since back in the truck, so I guess we'll see if I get a leak or not. It wasn't actually leaking, I just replaced it because I had the engine out... 
Robert, I ended up using a piece of angle iron with two holes drilled and bolts into the flywheel to evenly draw it off the crank. Worked pretty well.
Robert, I ended up using a piece of angle iron with two holes drilled and bolts into the flywheel to evenly draw it off the crank. Worked pretty well.
RiftRover
Well-known member
should I or shouldn't I?
Resurrecting this thread since I have another 300Tdi sitting on the garage floor about to be installed. The previous owner of the engine says the rear seal wasn't leaking. My better judgement says to replace it anyway since it is easy to access right now, but at the same time I don't want to replace it and then have it leak anyway, like seems to happen a lot. Am I crazy to even consider NOT replacing it? Thoughts?
Resurrecting this thread since I have another 300Tdi sitting on the garage floor about to be installed. The previous owner of the engine says the rear seal wasn't leaking. My better judgement says to replace it anyway since it is easy to access right now, but at the same time I don't want to replace it and then have it leak anyway, like seems to happen a lot. Am I crazy to even consider NOT replacing it? Thoughts?
