1969 Mustang Fastback w/ Detroit Speed suspension

[jeff71]

it's been awhile since I've updated this thread. The car is running and moving under its own power finally! Monday got a alignment done and started the exhaust.



Im dealing with a leaking 9/16-18 (hot side) fitting on the DSE rack. The fitting came with a Teflon washer, I've now been through three. I've tried copper, drain plug gasket and a O-ring. With the O-ring I used the Loctite 545 hydraulic sealant and without even starting the car as I was allowing time for it to set up it started to seep in about 15-20 minutes.

Anyone else have this problem? Any tips to get a good seal?

If anyone has pics of their DSE rack(any DSE rack) where the fittings thread in and can post a pic I'd appreciate it. I'm trying to see if the casting looks different.

Thanks

[jeff71]

I tried to turn the pics but it didn't work.

Here's a few of the DSE rack. FYI that's a cat hair inside.

[dhutton]

The sealing surface doesn’t even look machined so I don’t see how that will ever seal. It’s tough to tell due to the fluid but it looks like it’s machined for a different style adapter, maybe AN or internal o-ring. I’m would contact DSE.

Don

[randy]

I remember someone posting about dse having a run of bad fittings and not machined right. I can take a pic of two dse racks on sat if that helps.

[dhutton]

Originally Posted by randy

I remember someone posting about dse having a run of bad fittings and not machined right. I can take a pic of two dse racks on sat if that helps.

Now that you say that I remember that too. Here is the thread:

https://www.pro-touring.com/threads/...highlight=Rack

Don

[jeff71]

Originally Posted by dhutton

The sealing surface doesn’t even look machined so I don’t see how that will ever seal. It’s tough to tell due to the fluid but it looks like it’s machined for a different style adapter, maybe AN or internal o-ring. I’m would contact DSE.

Don

Originally Posted by randy

I remember someone posting about dse having a run of bad fittings and not machined right. I can take a pic of two dse racks on sat if that helps.

Please if you can take some pics and post.

Thanks!

[jeff71]

Originally Posted by dhutton

The sealing surface doesn’t even look machined so I don’t see how that will ever seal. It’s tough to tell due to the fluid but it looks like it’s machined for a different style adapter, maybe AN or internal o-ring. I’m would contact DSE.

Don

I've been in contact with DSE and they are saying the chamfered edge is where the seal would come from with either the Teflon washer they provided or a soft metal such as copper or aluminum. The DSE 9/16-18 part number 090210S is what the offer to work with the rack.


Thanks for the link Don. By the way its not bottoming out.

[EVIL SS]

Originally Posted by jeff71

Here's a few of the DSE rack. FYI that's a cat hair inside.

I think that fitting needs to be an O-ring boss fitting and not a straight fitting. That wide 45 degree edge is for the o-ring to mush into(my guess).

Is the fitting too long and bottoming out before the ring can seal? You can try a Stat o seal - https://www.pegasusautoracing.com/pr...CABEgKdIfD_BwE

You can find these at other places too under different names..

[jeff71]

Originally Posted by EVIL SS

I think that fitting needs to be an O-ring boss fitting and not a straight fitting. That wide 45 degree edge is for the o-ring to mush into(my guess).

Is the fitting too long and bottoming out before the ring can seal? You can try a Stat o seal - https://www.pegasusautoracing.com/pr...CABEgKdIfD_BwE

You can find these at other places too under different names..

I went and bought another fitting today that uses a fairly fat O-ring, I'm gonna try that today.

I'm getting conflicting info about what material should be used, how tight it should be and weather or not to use high pressure hydraulic thread sealant (Loctite 545).

[Musclerodz]

that rack is not machined for teflon washer. requires o-ring and should not require sealant