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You are watching: 2003 toyota highlander spark plug replacement

thought long and also hard about this job: then determined to offer it a walk after much research. Some say girlfriend can readjust the plugs without removing the entry manifold - however i have actually no idea just how that would"ve been possible on my "03 3.0L V6 1MZ-FE, perhaps a slight difference from the ?"04 and also later 3.3L 3MZ-FE? mine hands space not big or thick however my finger are fairly long and there was just not sufficient room in between the firewall and the behind of the manifold come even start to get any kind of work excellent such together disconnecting harness from coil packs, or even if you leave them associated - i just wasn"t able to view a means to maneuver.Invaluable resources:-YouTube by jimthcarguy "
" -TN "V6 plugs without removing intake manifold" by Hayabusafalcon-TN "3MZ-FE 3.3L v-6 spark plug adjust with photos" by Camrybill15 (but it no much longer has any pics)-TN "DIY 2GR-FE V6 Spark Plug Replacement" by Sweenypi post my experience doing my "09 3.3L 3MZ-FE V6 Highlander Hybrid in the Hybrid forum under "DIY 3MZ-FE "09 Highlander Hybrid Spark Plug Replacement". Ns did the "09 Hybrid after ~ doing the "03, therefore the "03 was kind of mine trial run.i used mostly 1/4" drive sockets, a few 3/8, and also had to go to Wally-world in ~ 23:35 come buy a pass-through socket set (you"ll see). I did not use any universal joints.red: cross-strut brace - eventually had to come outgreen: need to twist the entire emblem to get it disconnectedyellow: cruise control cable mechanismwhite: lot of hoses come disconnect. Ns was obsessive-complusive around marking anything i moved/disconnected as i"ve learned native past work where i skipped rebuild procedures bc i forgot where something went.
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front bank, driver side one has actually been cleaned:
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harness connector has record only on one side:
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backside is smooth:
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coil pack: is this cracked bad? i have no idea yet it is still working. 2 of lock looked like this:
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cut a plank to lie on together i suspect what a bitch those earlier bolts would certainly be from my research. I spent a lengthy time face-down simply carefully feeling for those fasteners and, many importantly, not dropping any type of of them:
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after disconnecting the cruise regulate cable and bracket (green), i attempted come "just see" if i can even gain to the driver behind plug as i could actually check out that one. Well, eventually i got it adjusted but then regulated somehow come not have the ability to extract my socket+6" extension (red). I couldn"t get them come disconnect from each other and i couldn"t obtain the totally free end the the extension to find enough room in the direction of the firewall to ever get it out. Therefore that"s once i establish - no choice now yet to do the whole manifold removed process:
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throttle human body hoses that had actually to come off:
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these space the just hoses/connections that i required to take off the upper support bracket (or every little thing you call it):
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eventually it every looked prefer this from the driver"s side (see the obsessive-compulsive labeling?)
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diagram that the fasteners that essential to come out: i"ve seen various statement regarding their sizes that seem come not constantly be correct - these are what mine were:blue: soil wires 12mmred: the bitch bracket!!! completely blind remove 14mmpurple: blind cable 10mm - has some play when loosegreen: hardline-to-back-of-throttle human body bracket 10mm slightly slotted and the brake lines provide a little, blindbrown: parentheses on driver next of accelerator body 12mm
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throttle/manifold bound up and to the right:
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(using exact same colors as previous)red: the Bitch. The bracket"s upright edges room scrolled rearward as a stiffening measure. Yet this reasons the bolt head to it is in "recessed" because that all will so you have the right to only gain a socket top top it, however not a wrench. Further, there to be so small room between the bolt and also the firewall that i couldn"t simply ago the bolt out bc the thickness of mine socket+driver to be ramming right into the firewall. Thus the trip to Walmart to get the pass-thru socket set. This combo was about 3mm less in complete depth and also i supplied until it too jammed up versus the firewall. At that point, the bolt was the end far sufficient that the head cleared the lip the the curve on the bracket and i got a stubby ratchet gear-wrench ~ above it.purple: cable is loosened so it is flopping over to the left a littlegreen: brake heat bracket, it flexes a tiny which assisted to align and also re-installbrown: throttle body bracket
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another look:blue: floor wiresred: the Bitchpurple: cable
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as you have the right to guess by now based upon all that fluorescent duct ice cream labeling, i don"t have a many engine repair experience. Are the intakes supposed to look favor this in ~ 174,000? (yes, the plugs have actually never been readjusted - oops):
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$400-500 saved by DIY
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