Oil leak is located at the rear iron oil cooler banjo. I have tried both copper and aluminum crush washers with out success. Its a slow leak. ABout a drop every 2 seconds at idle. The lines are corksport. I also tried putting a light layer of RTV on both sides of new crush washers.

I want to fix this without buying new lines or going -AN fittings. I plan on taking the line out and making sure it had a good clean surfaces on the banjo. What else should I try.

 

I've had the same oil cooler line leak with my SS corksport lines for about 2 years now.

 

Have you checked the banjo bolt to see if it is Flat?
You could try that.,maybe to see if you can get it flat.
Try a thicker crush washer?

 

How about.other.type of washers?

 

Are you sure it's not coming from above the oil cooler line? There are 2 o-rings under the oil filter pedastal that go bad and oil runs down in the area around the oil cooler line. Feel under the pedastal and see if its wet with oil. Just a thought.

 

Ill double check. But im almost 100% sure its dry above the banjo.

 

sure you didn't crack the rear plate? just asking as none of us can see where the leak is coming from.

 

Crack it from detonating the engine or over torquing the bolt? This engine.has never seen boost, rebuild has about 8 hts idle time and about 10 miles driven in vacuum. And the bolt would damage before the rear iron correct?

 

Have to be careful there...
The hole in the bolt must align with the relief groove inside the banjo, thicker washers (on either side) can misalign the two and cause a flow restriction (or maybe a leak?).

 

Next to try is taking line out. Resurfacing banjo faces using flat surface and fine grit sand paper with another pair of copper crush washers. Block had a brand new rear iron and crush washer area has already been checked. Nice
Flat and smooth.

 

Ok didn't know the history of the engine.

 

Correct me if Im wrong. If the correct washer is used between the bolt/banjo and a thicker crush washer used for the block/banjo it should still align. It shouldnt throw it off?


Another thing ive read is to heat up the copper crush washer. What about this?

 

So I got off work abd went ti make sure it was dry above the banjo. It was wet.... and it turns out i left the oil press sending unit hand tight. I had removed it before to try and after market gauge adaptet that didnt work out.

Leak fixed after tightning the sender.

 

It's always nice when it's something simple (and cheap!)