[C320-list] Perkins heat exchanger

[Dave Hupe]

Actually Dan ..... can you do your test again and look up into the exhaust elbow and differentiate ... is the water dripping out of the rubber nipple where the rubber boot connects to the exhaust elbow?  That would indicate the tube stack is bad/leaking.  If you can't  see it, maybe disconnect the rubber ripple from the exhaust elbow during your test .... direct discharge from the disconnected nipple will confirm a tube stack leak.
However, if during your test you can confirm the leakage is not from the nipple, then you are probably correct that the tank/housing is leaking somewhere right near the exhaust elbow.
Dave Hupe
1994 C320 #32

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  On Sun, Sep 15, 2024 at 9:25 AM, Dave Hupe<hoopdtwo at yahoo.com> wrote:   
Dan-
For your test (very inventive), I assume you had the end rubber boots attached and each end clamped securely on both the tank and tube stack? 
Actually, I think your test suggests that the tube stack has a leak.  Water in the pressurized tank should not permeate the tube stack and flow out the exhaust elbow.  If the tank actually were bad, shouldn't  leakage occur somewhere on the outside of the tank itself or out of the exhaust ports (where mounted to the engine)?
Can you pull the tube stack out of the tank, attach the rubber boots to its ends and pressurize it to see if it leaks?
Dave Hupe 
1994 C320 #32
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