my water pump is leaking so i thought i'd ask for input from y'all while i wait for it. it looks like getting the fan clutch off without special tools may be a pain. and what about antifreeze? is cavitation a problem on these 6.9l's?
86 6.9l water pump
- Thread starter grumpy1
- Start date
Buy some inexpensive special tools or maybe you can borrow from a local auto parts store. I bought an inexpensive set a few years ago and it was worth it--especially since I had a tiny leak a few days after install and it would have been irritating to have to borrow them again instead of just going at it ASAP.
6.9 has thick cylinder walls so I hear few reports of cavitation problems. Just run FleetCharge red/pink coolant and it's pre-charged with SCAs to counter cavitation.
6.9 has thick cylinder walls so I hear few reports of cavitation problems. Just run FleetCharge red/pink coolant and it's pre-charged with SCAs to counter cavitation.
TNBrett
Full Access Member
A large crescent wrench and a BFH. Works for me every time. A couple of solid whacks before you take the belts off and it should spin off from there.
gnathv
Full Access Member
The fan nut is left handed thread
CDX825
filtration nut
Yes and make sure you do a final flush with distilled water and use distilled for your coolant mix. Also would be a good time to change the heater hoses or radiator hoses if they are questionable.
Big Bart
Tow&Slow
Some of the bolts on the water pump go into the crankcase. Be sure to use some sealant on those ones. Or you could end up with coolant in your crankcase.
Also a good time to do the thermostat if it’s been a couple of years since you replaced it. Only use a Motorcraft one.
Take and send some pics.
Also a good time to do the thermostat if it’s been a couple of years since you replaced it. Only use a Motorcraft one.
Take and send some pics.
Stu Bailey
Full Access Member
Everything written above will definitely help you make this as painless as possible. I did mine less than a year ago and it actually wasn’t too bad. Once you get the fan out the way and definitely remember to put the sealant on those top two bolts.
I’ll go ahead and recommend Flowkooler for the pump. Their service is great and the product is amazing. Crafted here in the US.
flowkoolerwaterpumps.com
I’ll go ahead and recommend Flowkooler for the pump. Their service is great and the product is amazing. Crafted here in the US.
1983-1994 Ford 6.9L 7.3L Diesel hi flow water pump
Flowkooler's 1638 pump fits the 1992 Ford with the 300CID. It has a CNC machined billet impeller designed with an increased vane count and a reduced impeller clearance to achieve greater flow rates, higher head pressure and a more efficient flow than other OEM water pumps. Type II Class II...
flowkoolerwaterpumps.com
Everything written above will definitely help you make this as painless as possible. I did mine less than a year ago and it actually wasn’t too bad. Once you get the fan out the way and definitely remember to put the sealant on those top two bolts.
I’ll go ahead and recommend Flowkooler for the pump. Their service is great and the product is amazing. Crafted here in the US.
1983-1994 Ford 6.9L 7.3L Diesel hi flow water pump
Flowkooler's 1638 pump fits the 1992 Ford with the 300CID. It has a CNC machined billet impeller designed with an increased vane count and a reduced impeller clearance to achieve greater flow rates, higher head pressure and a more efficient flow than other OEM water pumps. Type II Class II...
I take it you used one? I've been considering one myself.
IDIBRONCO
IDIBRONCO
Lonewolf182
Registered User
Hopefully your fan nut comes off easy.
If not, check this thread.
www.oilburners.net
It shows a simple tool that I had to make the last time I changed a pump
If not, check this thread.
Fan clutch nut size
I've swapped a half dozen water pumps on these idi's but this one's killing me. I'm going to try a loaner fan clutch holder, as soon as i can come up with the deposit. I want to check on a wrench to fit that nut while I'm at it. Anyone know what size it is?
www.oilburners.net
Also, if you pull the fan and pump with the radiator still mounted then you might want to tape a piece of cardboard across the backside of the rad just to protect those delicate fins. One slip with the fan and it's new radiator time.
that Flowkooler pump looks great but i have already bought one.
my fan clutch came off pretty easy. a big adjustable wrench and a few wraps with a hammer and it broke loose.
two issues i've not seen discussed is getting the old gasket off and weather or not to use sealer.
the old gasket had molecullarly bonded with the block
i got most of it off with a lot of scrapping. would a die grinder with a brass brush do any damage?
my fan clutch came off pretty easy. a big adjustable wrench and a few wraps with a hammer and it broke loose.
two issues i've not seen discussed is getting the old gasket off and weather or not to use sealer.
the old gasket had molecullarly bonded with the block
i got most of it off with a lot of scrapping. would a die grinder with a brass brush do any damage?
Reggie f250
Full Access Member
The brass brush wont do any damage to the steel. Only thing I would recommend is to block off the openings so you don't get any in the engine. The pieces could damage the new pump.
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