98 7.4L MPI. I found 4 blue engine drain plugs.

[Shaun78]

Is this correct? 1 on each manifolds and 1 on each side of the block.

 

[Shaun78]

Re: 98 7.4L MPI. I found 4 blue engine drain plugs.

there are 5. I found them all

 

[Shaun78]

Re: 98 7.4L MPI. I found 4 blue engine drain plugs.

5 drain plugs, right???

 

[muc]

Re: 98 7.4L MPI. I found 4 blue engine drain plugs.

Might want to drain your power steering cooler, oil cooler and raw water pump! Also your fuel cooler if you have one. Good Luck Muc

 

[Shaun78]

Re: 98 7.4L MPI. I found 4 blue engine drain plugs.

I ran 6 gallons thru the flush ears so I should be allset. I also poured 2 gallons down the thermostat hole

 

[HT32BSX115]

Re: 98 7.4L MPI. I found 4 blue engine drain plugs.

Make ABSOLUTELY SURE that you remove the block plug/valves and poke a piece of wire in there enough to clear any rust flakes and sand.

Mine had so much sand and rust in it that it was partially plugging the drain valves and the engine was NOT draining completely!

Before I installed the engine I removed ALL of the soft plugs (3 on each side.....I'm NOT suggesting you do this) and found almost a half inch of sand/rust in places around the base of the back cyls. (and it's fresh water only engine) On the right side the sand/rust had risen up to the level of the drain valve on the right side of the block!!

I flushed A LOT of "stuff" out of those holes with a hose. Mine had actually been "drained" last winter but the original owner didn't get all of the water out and a soft plug popped out on each side. There were no cracks (luckily!!)

The popping plugs did not (save me) and does not save you from cracks.
Those plugs are only there to close holes required during the casting process.....they are NOT freeze plugs.


Finishing up with Anti freeze is a GREAT IDEA. It puts A/F in areas that pool water like the risers, water pump, heat exchangers , and the drive (although most water should drain from the drive if it's lowered when you store it).....etc.


Cheers,



Rick

 

[muskie hunter]

Re: 98 7.4L MPI. I found 4 blue engine drain plugs.

there are 5. I found them all

I have the same engine 1996 7.4 where is the 5th plug? one on each block and one on each exhaust manifold.


Thanks Steve,

 

[Shaun78]

Re: 98 7.4L MPI. I found 4 blue engine drain plugs.

2 on the left(looking at the engine from the front of boat) 3 on the right(manifold,block, and lower cooler or pump(not sure what it is but it's there.)