Are you using NPI or PI intake gaskets? You should be using PI gaskets with a dab of silicone around the water ports because they don't match up perfectly. Using NPI gaskets is a sure way to get a coolant leak.
4.6 Swap issues
I have a 98 GT. When I got it the motor was shot so I swapped it with a 98 Expedition 4.6L, after swapping many items from the Mustang motor. I put the PI intake and used the gaskets that I had for the PI intake but I think this is where my issues start. I got it running and now it is leaking water pretty bad on the back side between the motor and trans. I can also see the antifreeze pooling around the front of the right bank by the mating surface of the intake and head. When I put the gaskets on I had to break off the alignment pins on the gaskets so that it would go on there. Is there anyone that has done this as well or am I screwed and have to use the intake from the Exp engine, which causes more issue for hoods and such. An help would be appreciated as I am beyond frustrated at this point.
Jeremy
Jeremy
- Status
- Not open for further replies.
1 - 2 of 6 Posts
I just reread, and I would say your leak could actually be coming from the coolant nipple under the intake manifold. If you look into the valley, is there a pool of coolant in there? Although my bet is still on the intake gaskets. When you use PI gaskets on NPI heads, you have to put a dab of silicone around the coolant passages.
1 - 2 of 6 Posts
- Status
- Not open for further replies.
Ford Mustang Forum
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
Recommended Communities
