TracTuff K20Z3/ K24A Water Bypass Adapter
The OG water bypass adapter! Imitated but not duplicated. Still the best looking, best fitting (leak free!), and now the least expensive!
My water bypass allows RAA, RBB, RBC, and RSP cylinder head owners to run the more popular aftermarket intake manifold options that were designed for the earlier PRB/ PRC flange. The PRB/ PRC style manifolds do not have an integrated coolant passage so the coolant bypass hole is left open when used together. Even if you don't plan on running a PRB/ PRC style manifold... there are plenty of benefits that make this product a smart purchase! Benefits such as a reduction of intake manifold temps by eliminating the heat transfer/ heat soak associated with hot coolant running through the manifold. By simply modifying the manifolds flange (cutting off coolant portion) and running this adapter, the coolant is kept away from the manifold completely, just like what you would find on the earlier PRB/ PRC heads. NOW your Hondata IM gasket will really work!! I've personally seen drops in temp as much as 18°!! Not to mention, the additional benefit of no longer having to drain the coolant when removing the intake manifold for maintenance or swaps! It makes that job a real SNAP.
NOTE: Starting 4/16/20 ALL water bypass adapter sales will include a 90° 1/2" NPT to 5/8" hose fitting as STANDARD. You no longer have the option of buying a plug... if you are interested in deleting the water bypass hose and its function, please check out my new dedicated Water Bypass Block-Off.
Start by installing the o-ring into the recess on the adapter’s backside. Set the adapter aside.
Grab the stainless steel link and longer 40mm Genuine Honda flanged bolt and install the bolt into the smooth hole in the link.
Install the bolt and stainless link into the right-most intake manifold flange bolt hole. Tighten lightly with the link facing upward.
Grab the shorter 28mm Genuine Honda flange bolt and adapter and install the bolt into the lower bolt hole.
Take the bolt and adapter and install it over the exposed water & egr ports. Thread the bolt into the cylinder head until it is hand tight. Do NOT install the adapter over a gasket.
Grab the stainless steel set screw and thread it into the stainless link. The pointed set screw will tighten into the hole well but in some extreme cases it may be a good idea to use some medium grade Loctite.
Swing the stainless link and set screw down until it lines up with the pilot hole of your choice.
Tighten the 8mm intake manifold and Water Bypass bolts to 18 lb. ft. of torque and tighten the set screw until you have sufficient crush on the adapters o-ring. Congratulations! You're done.