Dear H.A.M.B.er's Just received my new Stewart Stage 2 pump Model # 22301 for my mildly tuned 327 SBC (circa 1965). I bought the aluminum pump as I thought it to be the best way to go and not have to worry about a water pump for the long haul. In doing the dry fir I noticed this pump does not have a water byp*** (small open port on the p***enger side of the water inlet). Stewart says that this by p*** is not used on their high performance Stage 2 unit. So the question is: do I need a byp*** for usual street driving/cruising? What are the downsides (if any) for using this pump on the street? Appreciate the expertise this group always offers. MrPhat40
I have never run one on any of my many sbc's. Never a problem. Heater or no. Maybe I've been lucky for 50 years.
Stage 2 pump shows to have the theaded hole for the heater hose connection in this shot https://www.summitracing.com/parts/emp-22103/overview/ What it doesn't have is the normally plugged outside of some truck applications byp*** connection on top. Most stock 327 iron pumps I have seen come with the byp*** hole on top and with a plug in it. I don't think in the past 55 years I have ever hooked up a byp*** hose to one. Like this one if the O'Reilly's link works. https://www.oreillyauto.com/detail/...6144/1964/chevrolet/impala?q=Water+Pump&pos=1
Actually I was referring to the by p*** hole as shown in the picture posted by Johnny Gee. Do I need this opening for a street car with a heater? Sent from my iPhone using The H.A.M.B. mobile app
It helps by giving water a chance to move when thermostat is closed (cold). In 55 the first year of SBC some vehicles came with out heaters so this by p*** was done.
Are you using a thermostat? I would drill a 3/16 hole in the thermostat. Creating my own byp***. Sent from my iPhone using The H.A.M.B. mobile app
The thermostat is a 180 degree high performance model from Speedway it features (3) 3/16th inch byp*** holes. So it looks like I will be okay with this unit. My concerns are all due to the fact I need to trim the driver side mount to get it to clear the timing cover. If I grind this pump in order to fit it I own it!! Appreciate the explanation of the byp***. MrPhat40 Sent from my iPhone using The H.A.M.B. mobile app
Reminds me of the time my Dad went to White Front to buy shoes and come home with a stereo unit instead.
Where to get and how to install sacrificial anode? I'd like to install one in each of the cars I have with aluminum components in the cooling system. As for the byp***, my sbc powered '31"A" Hiboy utilizes a Zip's water pump riser which omits the oem byp*** hole and the instructions that came with it were very emphatic about the necessity of a byp*** hose if there wasn't a heater with constant flow on the car. The hose runs from an outlet on the p*** side head to the ****** cast into the water pump housing.
Great point At this point in time I am returning the Aluminum Stewart for credit Looking into their cast iron unit. Appreciate your comments MrPhat40 Sent from my iPhone using The H.A.M.B. mobile app
simple install - one from Flex-A-Lite replaces radiator drain plug, Scott Drake & Northern Radiator offer radiator cap replacements
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