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2006 Scion xB, 1NZ-FE under the valve cover pics. #4107264 05/26/16 01:05 PM
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MichiganMadMan Offline OP
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I was visiting my family out of state and was chatting with my BIL about his car. Being a BITOG member, eventually OCI came up.
His trips are are never longer than 10 miles, and sometimes shorter than that. No expressway driving. In the winter, the engine may not get up to temperature for days. He was using bulk mineral oil, changed "about every 5K" at various quickie lube places. Total miles: 85K.

The car had a small weep from the back of the valve cover, so I offered to help by replacing it.
Pictures of what I found:





I'm going to have him do a couple of short changes with Rotella T6 to try to clean some of the gunk out of the engine. I'm not sure about the timing chain, it was a loose between the intake and exhaust cams. I'm not sure it is going to hold on for long.

Any thoughts?


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Re: 2006 Scion xB, 1NZ-FE under the valve cover pics. [Re: MichiganMadMan] #4107278 05/26/16 01:22 PM
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mehullica Offline
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The slack in the chain is normal in between the 2 gears. The chain tensioner is not full of oil when the engine is off. When it's running the tensioner pumps up & takes out off the slack.

Re: 2006 Scion xB, 1NZ-FE under the valve cover pics. [Re: MichiganMadMan] #4107289 05/26/16 01:37 PM
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LeakySeals Online Content
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There's no gunk just a little bit of varnish. Normal for that engine. I would just leave it alone and don't fool with it


06 Escalade 6.0L LQ9 AWD 170k M1 5w30
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Re: 2006 Scion xB, 1NZ-FE under the valve cover pics. [Re: MichiganMadMan] #4107305 05/26/16 02:03 PM
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Kuato Offline
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Not bad for all short trips on dino. "About 5k" tells me he goes over a lot. If he tightens up the interval to no more than 5k, it should be fine.


Thick vs Thin test: 15k / 43k miles complete
Re: 2006 Scion xB, 1NZ-FE under the valve cover pics. [Re: MichiganMadMan] #4107310 05/26/16 02:21 PM
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Chris Meutsch Offline
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Looks fine. Probably better than 60% of all engines out there.


2005 Honda CR-V EX, 280k
Re: 2006 Scion xB, 1NZ-FE under the valve cover pics. [Re: LeakySeals] #4107320 05/26/16 02:31 PM
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wemay Offline
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Originally Posted By: LeakySeals
There's no gunk just a little bit of varnish. Normal for that engine. I would just leave it alone and don't fool with it


+1


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Re: 2006 Scion xB, 1NZ-FE under the valve cover pics. [Re: MichiganMadMan] #4107324 05/26/16 02:35 PM
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cptbarkey Offline
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a little high on varnish but frankly not a concern. That engine will outlast their interest in it.

Last edited by cptbarkey; 05/26/16 02:36 PM.
Re: 2006 Scion xB, 1NZ-FE under the valve cover pics. [Re: cptbarkey] #4107384 05/26/16 04:02 PM
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simple_gifts Offline
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Quote:

I'm not sure about the timing chain,
I'm not sure it is going to hold on for long.


I think otherwise grin


2004 Prius; 126K; ALM
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Re: 2006 Scion xB, 1NZ-FE under the valve cover pics. [Re: MichiganMadMan] #4107394 05/26/16 04:13 PM
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Rand Offline
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just normal heavy varnish from too long with non-syn in that engine.

If he wants to forget oil changes have him step upto something like m1 EP.

That way when he forgets and his 5k oci becomes 9000miles... oil will hold up good.


2019 Jeep Cherokee Trailhawk 2.0T
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Re: 2006 Scion xB, 1NZ-FE under the valve cover pics. [Re: MichiganMadMan] #4107412 05/26/16 04:36 PM
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It looks fine for the service.


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Re: 2006 Scion xB, 1NZ-FE under the valve cover pics. [Re: MichiganMadMan] #4107461 05/26/16 05:55 PM
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Toaster_Jer Offline
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Looks pretty normal but definitely shorten the OCI

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