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Old 10-12-2004, 01:40 PM
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Don Moyer Don Moyer is offline
 
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Mechanical fuel pump rebuild services

After adding rebuilding kits and stainless sediment bowls to our online catalog in February and March, we continued looking into ways to make the mechanical fuel pump more reliable.

It quickly became apparent that the condition of the upper housings was the single most critical threat to the pump's reliability and safety. Approximately half of the old mechanical pumps we had stockpiled for rebuilding proved to have unusable upper housings due to corrosion, warping over the sediment bowl or hairline cracks around the inlet and outlet fittings. Developing a new and stronger upper housing therefore became central to our efforts in supporting the mechanical pump option.

With this background, if your mechanical fuel pump malfunctions, or when it comes time to rebuild the pump by virtue of age, we suggest the following progressive approach:

1. Disassemble your pump, and check the condition of the major housings. If they are in good condition, including a good fit between the sediment bowl and the underside of the upper housing, you should be able to rebuild your pump using one of our mechanical fuel pump rebuild kits.

2. If you discover that your upper housing is in good condition, except for a noticeable downward bow above the sediment bowl (where the bail attaches to the housing) which causes the bowl to rock back and forth when checking the fit without the rubber washer, you can most likely straighten this part of the housing using our mechanical fuel pump repair tool.

3. If you discover that your upper housing is not usable, but the rest of the pump is in good condition, you could opt to simply replace the upper housing with one of our new (improved) upper housings . This would be an especially attractive choice in cases where you may have previously rebuilt your pump and subsequently discovered a leak around one of the fittings.

4. If your pump looks like the proverbial "basket case", you can opt for either a rebuilt original pump or an MMI mechanical fuel pump which incorporates a new upper housing and stainless sediment bowl.
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