Oil Line Replacement

[hd2002hd]

I’m replacing the oil line that attaches to the oil filter housing on 1998 400 with 7.4’s. It doesn’t look like there is any thread compound or anything on the one I am removing. Any recommendations on thread compound for the brass fitting that screws into the filter housing or should I leave it dry?

 

[Boater420]

I left mine dry, no leaks yet.

 

[hd2002hd]

Thanks. I did them dry as well. Definitely no indication the old ones had anything on them. We will see.

 

[Boater420]

I replaced the one from the filter adapter to the oil cooler without anything on the threads and they haven't leaked in a year.

 

[hd2002hd]

So I replaced the oil line going to the filter and all was good with it. Then I noticed oil on the step a little forward of the last leak. After watching, the line from the filter is now leaking. After looking at this, I got to wondering how the hose was crimped onto the aluminum piece. After thinking about this, why could you not put a small hose clamp on the crimped piece and tighten it up a bit? The hose looks to be in good shape, it just appears the crimp has loosened up a bit.

 

[Lazy Daze]

To do a homemade "re-crimp", you'd want to cut a slit in the side of the existing crimp (believe it may actually be swaged) - but not past the bell end. You could do one slit on each side, being careful not to cut the hose. Then you could put a hose clamp or two on it as it will now have the room to decrease in size. Without that, probably not gonna do much. Although, if the crimp is leaking, and you just recently bought it, I would return it. Are you positive it's leaking from the crimp or could it be leaking from the threaded end and wicking it's way down?

 

[hd2002hd]

Sorry, it wasn't the new hose I installed. It is the other one going from the filter housing and it is definitely leaking from the crimp where the aluminum piece exits. It's not bad, but it is enough to make a mess. I was thinking just a little pressure on it and it would quit. I must have bumped it when installing the other one.

 

[hd2002hd]

So the marina merc spec sheet hose is not the same as mine. They are having a hard time identifying what is needed. Is there an online parts store where I can see opponent drawings so I can find it myself?

 

[Espos4]

Find a good automotive AC shop or machine shop in your area. Most are able to make those hoses for you.

They may reuse your metal pipe ends and crimp new hoses to them.

 

[hd2002hd]

Find a good automotive AC shop or machine shop in your area. Most are able to make those hoses for you.

They may reuse your metal pipe ends and crimp new hoses to them.

I wondered about that. Thanks for the tip.

 

[Boater420]

Find a good automotive AC shop or machine shop in your area. Most are able to make those hoses for you.

They may reuse your metal pipe ends and crimp new hoses to them.

I just tried to have one made at a local hydraulics shop. They also wanted to reuse my metal pieces and reattach them to a new hose. I wasn't happy about them having to reuse parts, but they said they could have it made the next day. They told me it was going to be $140 for each hose.

Went online, found the OEM part from Merc, sold on ebay for $40 bucks less. Ordered two, 5 days later. Saved $80 bucks and took the admiral out to dinner.

 

[hd2002hd]

I just tried to have one made at a local hydraulics shop. They also wanted to reuse my metal pieces and reattach them to a new hose. I wasn't happy about them having to reuse parts, but they said they could have it made the next day. They told me it was going to be $140 for each hose.

Went online, found the OEM part from Merc, sold on ebay for $40 bucks less. Ordered two, 5 days later. Saved $80 bucks and took the admiral out to dinner.

I was wondering what it would cost. I also wonder if you could just have them re-crimped. I took one of the ones I removed and dissected it. Nothing special inside. In fact, I think you could buy the hose and double hose clamp it on both ends and save another $60 probably. Sure, the crimped fitting looks nice, but it's not like there are not other hose clamps in the engine room.

 

[Boater420]

The shop I tried didn't have the matching tool for the fittings. Allegedly Gates fittings need Gates crimp tools and this place used a different brand of fittings. I thought it odd, but wasn't in a position to argue. I didn't really want them re-crimping 20 year old rubber anyways.

I'll tell you though, after having one of these things let loose, the mess I had to clean up was brutal. I would no way want to do it again. After seeing hose clamps split, it was better to have the pressure fitting.