• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Water Pump Flow Question

  • Thread starter Thread starter TRIBUNAL
  • Start date Start date Feb 25, 2017
T

TRIBUNAL

Active Member
Jun 12, 2005
103
6
28
Feb 25, 2017
#1
  • Feb 25, 2017
  • #1
Well I am doing a 302 rebuild.
The Timing cover I am using is the older 85 style mechanical fuel pump style. The fuel pump part is blocked off and I am using an electric pump. I am looking for a water pump and what I have read is I need a standard flow pump. This means I need a clockwise rotation water pump correct? Summit lists both as an option for that year. I am just a little confused because sometimes people are saying reverse rotation/reverse flow or standard rotation/standard flow. I assume they all flow the same direction and the proper term is rotation not flow....
Thanks for any help
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,827
10,508
203
polk county florida
Feb 25, 2017
#2
  • Feb 25, 2017
  • #2
I'm thinking it depends on what accessory drive your using but lets get an opinion from @madmike1157
 
T

TRIBUNAL

Active Member
Jun 12, 2005
103
6
28
Feb 25, 2017
#3
  • Feb 25, 2017
  • #3
Yea thats what I was starting to wonder myself,
The accessory kit is from a 91, actually it's off of a Thunderbird limited edition.
 

CarMichael Angelo

my rearend will smell so minty fresh,
15 Year Member
Nov 29, 1999
10,641
8,909
234
Birmingham, al
Feb 25, 2017
#4
  • Feb 25, 2017
  • #4
karthief said:
I'm thinking it depends on what accessory drive your using but lets get an opinion from @madmike1157
Click to expand...
I know nothing about a 5.0 Liter engine,...I have avoided using one since they called them that. The last "5.0" I ever built was called a 302, and it had the only pump that they made for them.
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,827
10,508
203
polk county florida
Feb 25, 2017
#5
  • Feb 25, 2017
  • #5
http://i1276.photobucket.com/albums...t Replacement/Banner_zpsa5bf0902.jpg~original
After some research it appears the 5.0 tbirds use the same belt route as a 5.0 mustang, can't say if length is the same, check part numbers for the waterpumps and belts to see if they are the same for mustangs, the routing is the same for 85's.
And yes they are reverse rotation,
 
T

TRIBUNAL

Active Member
Jun 12, 2005
103
6
28
Feb 26, 2017
#6
  • Feb 26, 2017
  • #6
hmm so if the accessory setup rotates the pump in reverse I either have to get a late model timing cover or old style accessory's... I was really leaning towards getting rid of the electric fuel pump I have and going to mechanical too.. guess I will have to scrap that idea....
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,827
10,508
203
polk county florida
Feb 26, 2017
#7
  • Feb 26, 2017
  • #7
I don't know if water pump rotation would matter to the timing cover, I can't see why it would. Let me find a member to chime in.
@74stang2togo
 
Last edited: Feb 26, 2017

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,827
10,508
203
polk county florida
Feb 26, 2017
#8
  • Feb 26, 2017
  • #8
Ok, forgot to bring the link with me but it seems the water pumps need to be matched with timing covers, reverse rotation pumps have a matching timing cover for flow, standard rotation pumps have a different timing cover than reverse rotation
 

Chuckman

GTFO you fat, heavy bastard
15 Year Member
Oct 21, 2005
1,604
1,002
173
st. louis, mo
Feb 26, 2017
#9
  • Feb 26, 2017
  • #9
The whole standard and reverse rotation thing can be confusing because some vendors will list the "reverse" as standard cause that's the same rotation as the factory uses.

Not being to see your specific bracketry, here's the easy way to tell what you need:
If the smooth side of the belt will be on the pulley you need a normal 87-93 mustang pump. This is the "reverse" (counterclockwise) rotation.
If the ribbed side will be on the pulley, then you need a crown vic pump. This is the "standard" (clockwise) rotation. Most vendors will list a part number of wp641 or similar.

That's for the mustang front dress, tbird may be different (especially the MN112 cars that I think were the base for the sn95) but that's a starting point anyway.
 
Reactions: General karthief

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,827
10,508
203
polk county florida
Feb 26, 2017
#10
  • Feb 26, 2017
  • #10
tandard rotation on left, and reverse on right. Note the mounting bolt count:

The note I'm making here is the water inlet holes, this pic shows the rev on the left is for efi, the important thing I think is the orientation of the inlet holes are different, there are timing covers that use a reverse rotation water pumps and have a fuel pump hole.
 
T

TRIBUNAL

Active Member
Jun 12, 2005
103
6
28
Feb 26, 2017
#11
  • Feb 26, 2017
  • #11
So, will a reverse rotation pump, which is what my accessories are set up for, work with the old style timing cover that calls for the standard rotation pump? yea that's the pic I saw above, it looks like it wouldn't work right.
"there are timing covers that use a reverse rotation water pumps and have a fuel pump hole." ahhh
 
T

TRIBUNAL

Active Member
Jun 12, 2005
103
6
28
Feb 26, 2017
#12
  • Feb 26, 2017
  • #12
ahh yea I see them on summit now, I guess that's an option.
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
27,827
10,508
203
polk county florida
Feb 26, 2017
#13
  • Feb 26, 2017
  • #13
If you have the timing cover on the left, no you cannot use the reverse rotation water pump, that said, ford made some serpentine belt setups that have a mechanical fuel pump boss, some LTDS, F150s and crown vics where mentioned, I don't know how compatible your accessory brakets will be.
 
T

TRIBUNAL

Active Member
Jun 12, 2005
103
6
28
Feb 26, 2017
#14
  • Feb 26, 2017
  • #14
I guess my only option is to get a newer timing cover and forget about the mechanical fuel pump unless someone has another reasonable option because I don't really want to change the accessory brackets.
 
Last edited: Feb 26, 2017
You must log in or register to reply here.

Similar threads

9
Engine Donor '00 Mountaineer meet '91 Fox
  • 91firecracker
  • May 11, 2026
  • Fox 5.0 Mustang Tech
  • 2 3
Replies
41
Views
517
Fox 5.0 Mustang Tech May 28, 2026
91firecracker
9
B
water pump installation questions
  • B0udreaux
  • Feb 5, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
38
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Feb 28, 2026
General karthief
6
Hey all,I’m putting together a 302 for my 1968 Mustang and wanted to post the combo + some questions to make sure I’m not missing crucial
  • 68_Disgustang
  • Feb 22, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
3
Views
668
1965 - 1973 Classic Mustangs -General/Talk- Feb 28, 2026
Noobz347
H
Fuel starvation issues, 91 EFI to carb swap. Car dying after 1-3 gallons used. EFI tank, electric fuel pump, bypass regulator. Dual fed carb
  • hassler
  • Oct 11, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
8
Views
670
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Oct 12, 2025
nickyb
J
Fuel pump question
  • jay99914
  • Feb 24, 2025
  • SN95 4.6L Mustang Tech
Replies
3
Views
297
SN95 4.6L Mustang Tech Mar 5, 2025
89ripper
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?