mr baer

So it looks like one of my frost plugs in the head of my 4.0L has given up the ghost. Ive taken it to a couple of local mechanics and theyll either not do it or have quoted $2K. Its the one on the back of the head between the firewall.
Does anyone know how I could fix this without pulling the head, or should i drop my spare engine in it cause this ones been neglected quite badly it seems.

DFlintstone

Don't they make rubber plugs you put in the hole and tighten a nut?

mr baer

If they did that would be awesome as, Ive never heard of frost plugs untill the other day

trans_am7935

They are called "Freeze Plugs" not frost plugs. also pulling the head is not that difficult. also you could throw some new lifters in there and new head gasket if you do pull the head if this motor has indeed been neglected. if you took the head to a machine shop they would pop it out, clean it up and replace it, also have then surface the head to make it nice and flat!

mr baer

Sweet as frost plugs is just the term the mechanics use on this side of the world, dont know why they always call **** by the wrong name.
Ive been talked into dropping my newer engine into it now

jronald

http://www.dormanproducts.com/c-354-...al-rubber.aspx

Ron

thakmfb

$2000 to pull the head and replace the freeze plug? That is easily a 4-5 hour job if you are mechanically inclined and $100-$150 in parts..

mr baer

So Im looking at the ones in the 50mm range???

Yeah stuffs expensive as down the bottom of the world. $1100 + tax for front calipers, over $8 a gallon for gas

Gota love those 4.0L though

DFlintstone

Ah...So your up side down...and can hear us all the way over here. I don't know the size but recently used clay to get an imprint of a hard to reach gap I needed to cut a shim for. 50mm sounds big for a head, but don't know. There are only so many EXPANSION plugs.(Ok, I made that up)

(calipers here can be under $25)(slave labor)

Spoonman

Not to hijack the thread or take away from your post at all and what you know but I was just told that you should not put new lifters on an old cam?

tiwvr1

Old school spoon man, doesnt think it really matters anymore. BUT I wouldnt bother replacing the lifters if they seem to be pumping up good.

mr baer

Im gana rip the engine outa the parts Jeep I have this weekend and start making it shiny n stuff ready for a transplant. Just really want to get as much life outa this engine as I can before swapping them.

UsmclovesXJ

Lol...uhmm post a pic of a frost plug anyone

thakmfb

I just put new lifters on an old cam and no problems. One of my lifters collapsed after head replacement. So I replaced them all with new push rods. runs awesome!

peep

U can put new lifters on an old cam, not old lifters on a new cam. As for the frosy freeze plugs, can also acces with trans pull and engine in. A good write up with pics on the gojeep-xj-info site. Mute point is your puttin in a fresh engine, new plugs in the swap in engine? Good luck with the swap.