[Tigers] Dimensions of Water pump for 289

[spook01@comcast.net]

Are the dimensions different between a tiger pump for the 260, 289 and 302 engines?  Are the open and closed impellor measurements the same?

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----- Reply message -----
From: "Dave Munroe" <dave at munroe.ca>
Date: Sat, Apr 17, 2010 10:36
Subject: [Tigers] Dimensions of Water pump for 289
To: <rfraser at bluefrog.com>, "'MAURO D'ANGELO'" <m_dangelo at verizon.net>, <tigers at autox.team.net>

Ron and all;

Correct after-market water pumps for the Tiger, (Rick's at SS notwithstanding) are difficult to source. There are many advertised for 1964-69 289 +++ SBF, but their advertised pump mounting surface to fan mounting dimensions are all over the map.

Beyond the importance of correctly aligning the pulleys, the distance from the pump mounting surface to the oversize rad I have fitted is 6". Pump suppliers do not advertise the overall dimension from the pump mounting surface to the end of the pump shaft. Many of the pumps advertised for our engines are actually longer than 6" ! So for sure they won't fit on my car.

The only pump I could find that was close to the original pump dimensions was the Stewart Stage 1 #16103 which is an alloy pump w/o a rear cover. It shows the pump mounting surface to fan flange surface at 5.09", which matches with the "Sunbeam Survivor" dimensions. (5.1") The only problem is the shaft is 3/8" longer than stock. I have ordered one of these pumps with the plan of shortening the shaft to the original pump dimensions.

My original pump is the one with the dreaded pressed steel impeller. Since I have my engine out now, it seemed a good time to replace it with a more modern, efficient pump. This Stewart pump has a 3/4" ball bearing, and a high flow impeller. Just what the doctor ordered.

Nothing is simple with these cars.

Dave


----- Original Message ----- From: "Ron Fraser" <rfraser at bluefrog.com>
April 17, 2010 10:01 AM
Subject: Re: [Tigers] Dimensions of Water pump for 289


Mauro
The distance from the pump face to the hub is Tiger specific.   See the
Shop Manual then check your pump.     Please note the numbers for this
distance are NOT correct in the Manual, so check your pump.   Also check
that when the pump is on the engine that the fan belt is straight between
all the pulleys.   This is another indication that you have the original
parts or at least the right distance.

Distance in the Manual    260    5.15"       289     5.43"
Correct Numbers                      4.875"               5.1"

The source of the correct numbers is  "The Sunbeam Survivor"  from TE/AE.

I encourage everyone to check the pulley alignment on their Tiger.
This tells you whether or not someone has replaced parts and knew what they
were doing or if anything else might have been changed.  2nd - you know the
water pump hub is in the correct position or not; you can rebuild your water
pump or buy a new one and put the hub to the correct distance.  See the Shop
Manual about measuring the distance.   Note; the water pump hub B9ME-8553-A
could be a unique Tiger part.

Ron Fraser
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