Cylinder wear

Didn't know if this would interest anyone as much as me....Been out of a Tacoma since 2012 and recently picked up a 2010 sr5 4.0 auto with 110k miles. Had a pretty well documented maintenance schedule since previous two owners always had oil change at the dealership. 1st owner average was 3k per change and 2nd was 5k. Overall pretty impressed by the lack of wear. Took pictures while doing plug change. Note about the plugs, they were all denso so I assume they had been changed before but had worn to the point the gaps were .059.

 

https://www.youtube.com/watch?v=P2Lp01qZ3MQ

https://www.youtube.com/watch?v=3S_iXxLhG8Y

 

Nice. Thats a cream puff!

.059 is nothing compared to some I've seen pulled out. These 4.0's run without a clue of degraded driveability.

 

I suspect many 1GRFE Tacos on the road are running on worn plugs. I enjoy working on vehicles but even I feel like 30k plug replacement intervals are a bit much these days.

 

I tore apart a 4L at 190K to do a rebuild (mostly to clean it due to someone failing to tighten the chain tensioners after a head gasket…they fell off and were ground into dust)…the cylinders were fine. I didn’t even need to hone them…just new pistons/rings/bearings/gaskets…it’s got 250K on it now and is perfect.

 

just gap n go every 100k until idle gets rough

my plugs lasted 220k

 

I see iridium plugs all the time go 70k+ miles with hardly any wear.

 

I don't change my iridium plugs but ever 100k miles

 

a long time ago, I was changing mine in all of my vehicles every 50k or so and every time, i saved all of the used ones, because (in hindsight) I think the change was unnecessary. I probably could have just cleaned them off and checked if the gap was within spec.