4.7 head removal
#42
Join Date: Jul 2007
Location: South Georgia/East Florida
Posts: 24,686
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I dunno how in the hell you got the heads off. The 4.7 in my Grand Cherokee dropped a valve seat and I couldn't even fathom pulling the heads with the engine stuffed in that tiny compartment.
I just pulled the engine over the holiday weekend. This weeks project is pulling both heads and sending them both to a local shop to be rebuilt. I'm not about to go through all this just to have a valve seat go in the other head three months down the road.
BTW, haven't determined if I'm gonna need a piston yet but I wouldn't be surprised. I can find standard pistons cheap but can't find any for the HO version. Dealer wants $290 for one!!!
I just pulled the engine over the holiday weekend. This weeks project is pulling both heads and sending them both to a local shop to be rebuilt. I'm not about to go through all this just to have a valve seat go in the other head three months down the road.
BTW, haven't determined if I'm gonna need a piston yet but I wouldn't be surprised. I can find standard pistons cheap but can't find any for the HO version. Dealer wants $290 for one!!!
#44
Hey all. Little help, please. I got a 03 4.7 (91k) that the PO overheated and blew the head gaskets (at very least). It did run when I got it, just very poorly and sounded awful. No noise from the bottom end, though. Compression was all over the map (155 on #5 all the way down to 15 on #3 and everything in between).
I've got it almost completely torn down now. However, when I went to put it in TDC, the mark on the crank does not correspond to #1 piston being all the way up. I don't want to proceed until i know if i'm going to screw something up by continuing w/o TDC. Its almost as if someone was in there before and screwed it up (possibly causing the problems in the first place).
Should I just continue and not worry about it and fix TDC later?
Thanks!
Kat
I've got it almost completely torn down now. However, when I went to put it in TDC, the mark on the crank does not correspond to #1 piston being all the way up. I don't want to proceed until i know if i'm going to screw something up by continuing w/o TDC. Its almost as if someone was in there before and screwed it up (possibly causing the problems in the first place).
Should I just continue and not worry about it and fix TDC later?
Thanks!
Kat
#46
Hey all. Little help, please. I got a 03 4.7 (91k) that the PO overheated and blew the head gaskets (at very least). It did run when I got it, just very poorly and sounded awful. No noise from the bottom end, though. Compression was all over the map (155 on #5 all the way down to 15 on #3 and everything in between).
I've got it almost completely torn down now. However, when I went to put it in TDC, the mark on the crank does not correspond to #1 piston being all the way up. I don't want to proceed until i know if i'm going to screw something up by continuing w/o TDC. Its almost as if someone was in there before and screwed it up (possibly causing the problems in the first place).
Should I just continue and not worry about it and fix TDC later?
Thanks!
Kat
I've got it almost completely torn down now. However, when I went to put it in TDC, the mark on the crank does not correspond to #1 piston being all the way up. I don't want to proceed until i know if i'm going to screw something up by continuing w/o TDC. Its almost as if someone was in there before and screwed it up (possibly causing the problems in the first place).
Should I just continue and not worry about it and fix TDC later?
Thanks!
Kat
Bob