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Discussion Starter · #1 · (Edited)
Hello, first time poster. I need to determine the proper location of bolts in the water pump. Needless to say my system of putting them in the way they came out fell on the floor in a tragic work bench incident. My 11 bolt pump has 3 different sizes. 2 are 4" long, 4 are 4-1/2 long and the other 5 are 2-1/4" long. I get where the smaller bolts go, but my question is specific to the 2 4" bolts. I have read that there may be interference issues inside the engine with the cam gear if the longer bolts are used in the wrong place. My understanding is that #1 needs to be the shorter bolt, but what about the second one (perhaps #2)? Thank you for your help. I don't claim this photo to be mine, I just found one that helped explain my issue.

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I did mine about 2 years ago so i don't recall exactly, i would recommend sitting all the parts together and putting all the bolts in to see how far they protrude out. Then perhaps doing a dry run on the engine without the gaskets and or sealants to try and confirm. Also the FTE forum could be helpful.
 

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1 2 4 7 and 10 use the 2.25"
3 and 5 are 4"
6 8 9 and 11 are the 4.5"

93 and up EFI with the HD water pump uses longer bolts than the earlier 460's.

#1 hole goes through the front cover. The danger can be a long bolt hitting the cam gear.

#3 goes into the water jacket. Use silicone on the threads.



SJ
used 2b RHP


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Hey Scotty, great info! But you mentioned that, "93 and up EFI with the HD pump uses longer bolts than earlier 460's." Could you possibly give the EARLY 460/429 bolt measurements? I recently had a major internal block coolant leak and I still haven't found the cause. I replaced the block and am just trying to cover all the bases.
 

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Discussion Starter · #5 ·
1 2 4 7 and 10 use the 2.25"
3 and 5 are 4"
6 8 9 and 11 are the 4.5"

93 and up EFI with the HD water pump uses longer bolts than the earlier 460's.

#1 hole goes through the front cover. The danger can be a long bolt hitting the cam gear.

#3 goes into the water jacket. Use silicone on the threads.



SJ
used 2b RHP


.
Thank you for all the detail, that is a big help.
 

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I have a 1992 goshen coach 7.5 460 with 17 bolts onwater pump I need the bolt pattern from long to short. The pump that came off and the new one was thicker so I need longer bolts .
Hello, first time poster. I need to determine the proper location of bolts in the water pump. Needless to say my system of putting them in the way they came out fell on the floor in a tragic work bench incident. My 11 bolt pump has 3 different sizes. 2 are 4" long, 4 are 4-1/2 long and the other 5 are 2-1/4" long. I get where the smaller bolts go, but my question is specific to the 2 4" bolts. I have read that there may be interference issues inside the engine with the cam gear if the longer bolts are used in the wrong place. My understanding is that #1 needs to be the shorter bolt, but what about the second one (perhaps #2)? Thank you for your help. I don't claim this photo to be mine, I just found one that helped explain my issue.

View attachment 91944
I need the 17 bolt pattern.
 

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I have a 1992 goshen coach 7.5 460 with 17 bolts onwater pump I need the bolt pattern from long to short. The pump that came off and the new one was thicker so I need longer bolts .

I need the 17 bolt pattern.

The pre 1993 water pump used shorter bolts and a smaller flange. Make sure you have the "Correct" pump !!!!







Scotty J. "AKA" The "Mad Porter"
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