Product Summary

.98" Mounted Length, RH Male Thread Type, Polished

  • 1937-1948 Flathead Ford Water Pump Bolt Kits
  • Allen head design
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Key Specs

MFG. Part #91303945
Thread TypeRH Male
Thread Pitch3/8"-16
Wrench TypeAllen
Material TypeStainless Steel
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Need To Know

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Speedway Motors 91303945 Details

Premium stainless steel socket head bolts for a 1937-1948 Flathead Ford water pump. Each kit includes stainless steel AN washers. Contains enough hardware for two water pumps.

Item Details

Contains enough hardware for two water pumps

This kit is applicable to the cast iron water pump only.  It is not applicable to an aluminum water pump.

This kit is applicable to the cast iron water pump only.  It is not applicable to an aluminum water pump.

Speedway Motors 91303945 Specifications

KEY SPECS
MFG. Part #91303945
BrandSpeedway Motors
Thread TypeRH Male
Thread Pitch3/8"-16
Wrench TypeAllen
Material TypeStainless Steel
FinishPolished
GENERAL
Mounted Length.98"
Thread Length.98"
Wrench Size5/16"
Sold in QuantitySet
NotesAll bolts are same length. Includes washers. Enough for two water pumps.

Ratings & Reviews

4.8

5 Reviews

Overall Assessment

Customers appreciate this product for its practicality and quality of material. The stainless steel bolts, with anti-seize application, prevent rust and ensure easy removal, making maintenance less daunting. They are particularly recommended for problematic areas where rust often occurs. The product design, featuring allen heads, not only enhances ease of installation but also removal. The bolts' lengths match the specifications, providing the proper clamping force required. Users recommend thorough cleaning of bolt holes before installation for optimal benefits. They outperform competition in function and utility, although some bolts may contain removable socket flash.

4.8

5 reviews

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yes

5.0

2 months ago

Sam

Eagar, AZ

Verified

all great

Would Recommend

They were exactly as discribed

5.0

a year ago

Old man

Rosedale BC Canada

Verified

They fit perfectly and came painted

Would Recommend

Not original... luckily

5.0

9 years ago

John from Cool

El Dorado County, CA.

Verified

These stainless steel bolts, when installed correctly, will save a ton of future hassles. I recommend the bolt holes be thoroughly cleaned out before installing the new ones. I've seen many folks just cranking in new bolts into the holes without regard to dirt, rust, funky threads, etc. DON'T DO IT!!! Always use anti seize on stainless steel bolts. These bolts have allen heads, so while not O.E.M., they are easier to install and remove. The room around the original hex head bolts do not allow some spanner type wrenches to fit. The original steel bottom bolt, being inside the lower radiator hose area has always been a problem to remove do to heavy rust... The head of the bolt usually rounds off, requiring extra effort and often a true problem removing... especially when the bolt head breaks off into the block. Not fun! Obviously stainless steel is not going to rust and with the anti seize applied, the bolt will come right out when needed. If original appearance is required, at least use the stainless steel bolt on the bottom position. Why wouldn't you?

Would Recommend

Good product but

5.0

10 years ago

N/A

Jackson Michigan

Verified

These bolts work well on the early water pumps, however if you are using the later style replacement pump or 8BA truck pumps you will need the later bolt kit. The center bolt on the late pumps is longer than that for the 37-48 water pump.

Would Recommend

Good Stuff!

4.0

11 years ago

Fordbarn Fellow

Kokomo, IN

Verified

I purchased the set of bolts listed for attaching the water pumps to a flathead Ford engine, in my case a 59ab. After cleaning all of the tapped, blind holes with a thread chaser and using an air hose to blow out loosened debris, I checked all bolts for proper length thereby ensuring that all would provide proper clamping force to the water pump(s). All bolts were the proper length. They were all installed with the washers provided and a fairly liberal amount of anti-seize compound. Since this is a freshly rebuilt engine, I chose to use all of the socket head stainless steel bolt offered by Speedway. They meet expectations as far as appearance and utility are concerned. My only criticism - and a very minor one - is that some bolts had some flash in the socket heads which had to be removed prior to installation. Not a big deal. Would buy this product again.

Would Recommend

Showing 5 of 5 reviews

Questions & Answers

Fitment

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