1969 A-4 Late model w/RWC system in salt water.
Pic’s to follow at end of post
PART ONE
Good water flow out the exhaust
Using a IR temp gauge
1. Engine block side of the manifold at good temp all around the block.
2. Upper part of the manifold temp around 190
3. Lower part of the manifold smoking and temp over 300 in a very short time.
My opinion is that part of the water passage is clogged.
PART 2
Bought a used manifold and as per Moyer instructions, with some changes did:
1. Filled the input/output ports with Mauriac acid (lot of foaming) and let
stand overnight.
2. Flushed and neutralized
3. Plugged the input/output ports
4. Removed the drain plugs and the freeze plugs and filled with Mauriac
acid (lot of foaming) and let stand overnight.
5. Flushed and neutralized
6. Using a coat hanger probed all openings and flush and repeat several
times until no more garbage came out.
7. Replaced freeze plugs and fittings.
PART 3
Removed the original manifold and installed the used one with new gaskets.
Fired it up, good water flow out the exhaust, and had the same problem as in PART ONE.
PART 4
I intend to use the same procedure with the original manifold as in PART 2. After that Intend to get it professionally flushed.
How do I get this done and who would do this kind of thing?
I have heard of hot tanking but have no info on this or how it works.
Hope I was not to long winded but really had to explain the steps I followed.
ORIGINAL MANIFOLD
FLANGE SIDE BURNT
FLANGE SIDE TOP VIEW BURNT
INTAKE/EXHAUST SIDE BURNT BELOW PORTS
TIA FOR YOUR HELP.
Regards
Bill
Home Port NJ
Pic’s to follow at end of post
PART ONE
Good water flow out the exhaust
Using a IR temp gauge
1. Engine block side of the manifold at good temp all around the block.
2. Upper part of the manifold temp around 190
3. Lower part of the manifold smoking and temp over 300 in a very short time.
My opinion is that part of the water passage is clogged.
PART 2
Bought a used manifold and as per Moyer instructions, with some changes did:
1. Filled the input/output ports with Mauriac acid (lot of foaming) and let
stand overnight.
2. Flushed and neutralized
3. Plugged the input/output ports
4. Removed the drain plugs and the freeze plugs and filled with Mauriac
acid (lot of foaming) and let stand overnight.
5. Flushed and neutralized
6. Using a coat hanger probed all openings and flush and repeat several
times until no more garbage came out.
7. Replaced freeze plugs and fittings.
PART 3
Removed the original manifold and installed the used one with new gaskets.
Fired it up, good water flow out the exhaust, and had the same problem as in PART ONE.
PART 4
I intend to use the same procedure with the original manifold as in PART 2. After that Intend to get it professionally flushed.
How do I get this done and who would do this kind of thing?
I have heard of hot tanking but have no info on this or how it works.
Hope I was not to long winded but really had to explain the steps I followed.
ORIGINAL MANIFOLD
FLANGE SIDE BURNT
FLANGE SIDE TOP VIEW BURNT
INTAKE/EXHAUST SIDE BURNT BELOW PORTS
TIA FOR YOUR HELP.
Regards
Bill
Home Port NJ
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