Have a 460 engine and just replaced the water pump on the truck but there was still coolant leaking under the truck. Thought that I didn't tighten the bolts enough, so went through and made sure all were tight. Started the truck again and I noticed that there is still a leak coming from behind the water pump but can't pinpoint the exact spot.

Oil doesn't have any coolant inside it, so I am at a stand still. The leak is coming down the front/passenger side behind the water pump but on the front of the engine to the oil pan.

Thoughts? Would a radiator sealer work and stop the leak, like the one from prestone?

 

Take it back off, and inspect the gasket and the gasket surfaces. Sometimes the timing cover can corrode and leave a rough spot that is hard to seal. I am assuming you used a little bit of RTV on the gaskets?

 

The 460 timing case has convolute weep pathways around each coolant passage.
If the timing case is pitted or otherwise not flat where the water pump passages go to each bank then you will have a leak, and it it hard to figure out.
(unless you've been there before)

 

I will pull it off and look to see if there is any issues with the timing cover. Yes I did use RTV on the gaskets too.

 

Look for the little 'racetrack' around the coolant passages on the back side of the case.
They are there to let you see a leak, and keep it from reaching the oil.
That way the crankcase will not fill with coolant.

 

Finally able to work on the truck last night. Pulled off the timing case and didn't see any leaks and looked in good condition. I cleaned off all the old gaskets and put on new ones. No leak prior to starting the truck but when I turned it over, it started to leak again in the same spot.

Oil doesn't have any antifreeze in it, so now what???? Help!!! Thoughts???

 

I usually let everything sit for a half day before i even fill the engine with coolant.Maybe there's an unseen crack in the timing cover or waterpump,especially if it's a reman'd pump.It happens.Could be you're not tightening the bolts enough.Check the mating surfaces for straightness.

 

Water pump was brand new, not reman'd and bolts were tightened as much as it would go.

Could it be that the engine has a crack on it where the water pump attaches? Would the a bottle of antifreeze leak stop solve the problem?

 

Not likely the block is cracked.

You need to isolate the source.
Dry everything off and watch for the leak.

 

IIRC those timing case covers are made of pot metal, a really soft substance.

Ford gave torque specs for all those bolts for a reason; if you overtightened and broke something, a leak wouldn't surprise me.

 

A broken case should be apparent.
He used RTV, which should take care of surface imperfections.

Damn, a new timing case is only $60 or so...

http://compare.ebay.com/like/1404094..._lwgsi=y&cbt=y

 

...I don't know what this site has with Ebay.

$43.60 + 15.00 shipping.
Crankycrankshaft.
You're going to have to find it yourself.

 

I don't know what you're talking about, works fine pour moi.....

 

If the pump backing plate isn't completely pockmarked there shouldn't be a sealing issue if RTV is used.

Perhaps the OP is only changing the water pump and hasn't even removed the timing case.
THAT won't help if the leak is between the case and the block, or the plate and the case.

 

Is the plate installed on the back of the water pump?