'79-'85 vs. '86-'93

[84_GT350]

Ok...it's getting to the point where it's hard to find stuff for my car. Is there any difference between the water pump for a post '86 car and one for a pre '86 car? All the reasonably priced ones I see are for '86 or '87-'93 cars.

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1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s

[Dark Knight]

I think the injected ones are shorter..
the 84 ones are easy to find... did you check CSK?

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84 convt,'95 302,AFR's, performer
3.55's, underdrives stock shorties
stock cam, 1.7's
14.06@100.21, 255RWHP on a hot day
265 on the mph/weight chart

[Chevyguy]

The 86 up pumps are all serpentine belt reverse rotation and are the most popular ones. The more cars a part fits, the cheaper the parts beacome. The water pump for my Laguna cost $25 brand new since it fits every 69- 93 Chevy small block, only about 25 millon made in that timeframe.

A stock replacment pump or rebuilt one should work fine in your car. Hipo pumps are mostly a waste of money for an average street driven car, except for shiny polished ones for cosmetic reasons.

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Frank W
90 5.0 LX coupe Daily driver. Silencer removed, K&N filter. Flexalite fan, 3 core radiator. FMS flywheel and Clutch, FMS blue wires Energy Suspension end links
88 Notch 2.3L 5 speed Parts/beater car My two Notchbacks

74 Chevy Laguna Type S-3 305 Finally fixed getting a 454 to put in garage
<A HREF="http://www.chevellepages.com/folingo" TARGET=_blank>www.chevellepages.

[Dark Knight]

the 83-85 are reverse rotation too..

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84 convt,'95 302,AFR's, performer
3.55's, underdrives stock shorties
stock cam, 1.7's
14.06@100.21, 255RWHP on a hot day
265 on the mph/weight chart

[matt cook]

What about 82 Gt's they had serpentine also?

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1982 Mustang GT

I've been looking into the same thing myself and i've discovered that they started the reverse rotation serpentine systems i think in '82 when they started the whole 5.0 HO engine line. I believe the difference is until '87 they were continually changing the impeller diameter of the water pump, but i'm not sure exactly what years they did that but i know that there's at least 3 different sizes, the sizes increased through the production years. I've been looking into putting on a '87+ style water pump, but i don't know if i have to get the whole front timing chain cover (don't know if they changed mounting depths, or ???). It is frustrating because i know for a fact that the '87+ water pumps flow better, but i have no idea how you can retrofit them on an earlier stang. There's a infinate amount of info on everything else, but nothing about the water pumps, which is one of the most important items on the engine. I'm also hesitant to get underdrive pulleys because i don't know how well my smaller impellered water pump would do. I hope someone can clerify this for us...

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'84 Mustang 5.0 LX
My car

[red82gt]

I think that the newer one bolts right on, I used an 87 up pump on my stock 82 timing cover no problem, I now have an 87 up timing chain cover but I don't think there really is a difference in alignment.

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GT-40 heads (ported, polished, + milled), B303 cam, 1.7rr's, JE pistons, Offy intake, Carter AFB 625cfm carb, Flowtech 1 5/8" shortys, Flowtech X-pipe, MAC Flowpath exhaust, MAC pulleys, 373's, subframes, Eibachs+Tokicos, B+M ripper, FMS Clutch, Zoom Quadrant+cable, 17" CSA Ultra rims, 235/45ZR17 Yokohama AVS S4's, MSD 6A ignition+coil, FMS 9mm wires, Carbed, Naturally Aspirated, and Nasty!

thanks Red82GT, now i need an excuse to replace mine .

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'84 Mustang 5.0 LX
My car