replacements for Cracked heads on 3.4 S/C'd
10-16-2004, 09:13 PM
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replacements for Cracked heads on 3.4 S/C'd
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I have been reading about many who have SC'd their rigs and wound up with cracked heads, but no one has said what they did about their heads for replacement. I have 105k on my 3.4 v6 motor and about 35-45k on my S/C. I had excessive fluid in my exhaust and figured I had leaky head gaskets. I took it to a friend's shop to replace the head gaskets because I'm way out of my warrantee. After careful inspection I find out my radiator and water pump have been overpressurized and i need to replace those
, then I find out I have cracks in my #3 and #4 cylinders between the intake and exhaust valves 
. I'm reading it's common with s/c'd 3.4's w/o the help of fuel mods, correct? I have my 4Runner in my friend's shop waiting for me to figure out what to do. HELP!!!!! I don't want this to happen again (duh!!) and I'm already looking at a few grand to replace the heads (Toyota stealership $980 PER head BARE!!!#$%^... TAP $480 PER head BARE USED!!! 
AARGHHHHHH) I'd like to keep my motor as it is way fun to drive with, but a motor swap might cost me less than new heads, radiator water pump, URD fuel mod kit etc 
. Any advice would be greatly appreciated. I am hoping to come up with a long term fix so I'm contemplating having it towed back to my house while I figure out what to do.
I have been reading about many who have SC'd their rigs and wound up with cracked heads, but no one has said what they did about their heads for replacement. I have 105k on my 3.4 v6 motor and about 35-45k on my S/C. I had excessive fluid in my exhaust and figured I had leaky head gaskets. I took it to a friend's shop to replace the head gaskets because I'm way out of my warrantee. After careful inspection I find out my radiator and water pump have been overpressurized and i need to replace those
, then I find out I have cracks in my #3 and #4 cylinders between the intake and exhaust valves . I'm reading it's common with s/c'd 3.4's w/o the help of fuel mods, correct? I have my 4Runner in my friend's shop waiting for me to figure out what to do. HELP!!!!! I don't want this to happen again (duh!!) and I'm already looking at a few grand to replace the heads (Toyota stealership $980 PER head BARE!!!#$%^... TAP $480 PER head BARE USED!!! AARGHHHHHH) I'd like to keep my motor as it is way fun to drive with, but a motor swap might cost me less than new heads, radiator water pump, URD fuel mod kit etc . Any advice would be greatly appreciated. I am hoping to come up with a long term fix so I'm contemplating having it towed back to my house while I figure out what to do.
10-16-2004, 09:19 PM
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Which heads are available for 3.4L
My most urgent question is this: Can I use 3.0 heads on my 3.4? PROS vs CONS? Are they just as succeptible to cracking as the 3.4 heads? What else can I use? Are there any other companies that offer heads for the 3.4L besides TAP ($480/head) and the stealership ($980/head)?
10-16-2004, 10:03 PM
#3
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Originally Posted by Cougarfreak
My most urgent question is this: Can I use 3.0 heads on my 3.4? PROS vs CONS? Are they just as succeptible to cracking as the 3.4 heads? What else can I use? Are there any other companies that offer heads for the 3.4L besides TAP ($480/head) and the stealership ($980/head)?
10-17-2004, 04:24 AM
#6
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Originally Posted by Cougarfreak
copy dat, I'm thinking the engine replace is the quickest, and probably cheapest bet. Thanks!!! I'm still open for options.
Do yourself a favor and do the fuel mods before putting the S/Cback on tho! :pat:
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