GX - 1st Gen (2004-2009) Discussion topics related to the 2003 -2009 GX470 models

Tune-up - What to replace?

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Old 02-21-19, 05:50 AM
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gofrisch
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Default Tune-up - What to replace?

Hi all,
What are the standard items to replace when doing a tune-up on the 1st gen GX470? Thanks
Old 02-21-19, 11:05 AM
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ALAN553
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Spark plugs and maybe a PVC valve..not much else...that’s the extent of a tune up these days.
Old 02-21-19, 11:43 AM
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vwynn
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replace engine and transmission.
Old 02-22-19, 05:40 AM
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supperfly1
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Originally Posted by vwynn
replace engine and transmission.
Not helpful
Old 02-22-19, 08:43 AM
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vwynn
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Originally Posted by supperfly1
Not helpful
how so? replacing engine and transmission with new one guarantees that the GX will run better than before.
Old 02-22-19, 11:57 AM
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dchan865
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Well I dont think you can really call it a complete tune up, may be a partial. About 1.5 years ago when my rig had about 225K miles, give or take a few, I did a timing belt job(also included radiator, coolant, water pump, belts, alternator seals, tensioner, idler replacement) and got the spark plugs replaced for the first time, Other than the sparkies people usually replaced during tune up , never really done anything else. My rig has been pleasure to drive and my vehicle that has the most milege, got my money's worth for sure.
Old 02-22-19, 02:22 PM
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ALAN553
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Originally Posted by supperfly1
Not helpful
i agree, not your typical response on this message board...most are friendly and helpful....the service tune-up is not the same as it used to be....computers and electronics...it’s pretty much just spark plugs...the maintenance schedule spells out needed services and when...
Old 02-22-19, 03:50 PM
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chiph9
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Spark plugs at 100k Or just do them with the timing belt service at 90K (since you're opening your wallet wide anyway..)

Use factory spec NGK iridium plugs (Denso is fine too). Do NOT use Bosch or Champion.

They're expensive, but they last a very long time.

Chip H.
Old 02-22-19, 05:13 PM
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RushNatU
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If youre after top running condition and preventative maintenance, I would do MAF sensor and throttle body cleaning, change engine air filter, change all fluids including transmission, transfer case, and both differentials. Change battery if old. Retorque valve cover bolts if not leaking, replace valve cover gaskets if leaking. I also like to run seafoam once in a while thru gas tank, intake, and crankcase right before I change the oil.
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Old 02-22-19, 06:45 PM
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ALAN553
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No points, rotor, condenser, distributor cap or checking the timing?
Old 02-23-19, 06:25 AM
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chiph9
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It has coil-on-plug, so there's no points, no rotor, no condenser, no cap. Timing is set by the computer based off the camshaft position sensor, the ambient temperature sensor, and a few other inputs.

The how-to video talks about gapping the plugs, but I've never seen a NGK that was wrong. So you just want to check the gap and check for the off chance it's wrong.

Old 02-24-19, 06:30 AM
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ZiaMan
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Additionally replace your accessory belt, idler pulley and tensioner or tensioner pulley as well. I like to through in the gas cap just as preventative.
Old 02-26-19, 02:51 PM
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RushNatU
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Originally Posted by ALAN553
No points, rotor, condenser, distributor cap or checking the timing?
Is this dude serious? I’m dying
Old 02-26-19, 05:05 PM
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ALAN553
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Originally Posted by RushNatU


Is this dude serious? I’m dying
no sense of humor in Indiana? And not a dude!
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