I just fixed a leak from the Orings on pipe going into rear cylinders. Filling up with colant and I now have a major leak on RHS from the tell tale hole below the big bridge pipe!
I didn’t have a leak there before. From what I can see there shouldn’t be a way for coolant to get through to that tell tale hole? see pic below
Any ideas?
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Assuming the cyl head coolant connector tube O-rings are ok… #25 in the pic below, the only way for coolant to be coming out of the drain hole under the “bridge pipe” is either one of the O-rings on the bridge pipe or “shaped” O-rings in the two end fittings are leaking. #21 or #22 in the pic below. Check them all, if they’re the originals, they’ll be 40 years old.
Smithy.
Hi Smithy,
thanks for the quick reply. I had all this off before refitting carbs a while back, and had fitted new Orings on the connector pipe, and the alloy caps. What is very puzzling is that even if it was leaking at either of those places, the coolant would leak or weep outside of the pipe, or alloy junction, not flow out of the weep hole? There is no direct connection between the large coolant gallery with the link pipe, and the weep hole. No sign of corrosion, or crack etc. that the coolant could run through to exit the weep hole below?
I have another R motor in bits on a bench. I’ll check it out now. In years of VF ownership I have never had this happen?
I reckon you’re right Smithy,
checked the spare motor, and the weep hole just carries through underneath on both sides, so it drains any leakage from that crossover pipe.
Despite replacing the Orings, I must have had a leek on one side that I couldn’t see. this would have filled the little void below, and then drained out of the RHS weep hole, as it was designed to.
Back into it now, will carefully replace the 2 crossover pipe Orings, and also the ones in the alloy housing just to be sure. I had all sorts of terrible thoughts of a cracked liner…
Thanks again
