[RockDoc]

Did the engine by chance have Mobil in it before? Looking through the virgin oil analysis at BITOG, I noticed that the Mobil that they ran had lots of Na in it, could some be lingering in sample you sent in?

Originally Posted by Bryan062087

Update:

Got the test back from Blackstone, it looks like they screwed up my report. They put down I had a "3sfe" 2.0 4 cylinder engine with 145,000 miles when it should have been 3fe with 195,000. They did have the right oil listed and vehicle. - 15w40 and land cruiser. Anyone should be able to tell that a land cruiser would not have a 4 cylinder engine running 15w40 in it...

Whatever its worth ,the test shows OK wear and a trace of sodium indicating that there is very slight presence of coolant in the oil. But who knows if they compared my oil to the avg #'s a 3SFE should be seeing.

Basically inconclusive.. but possibly it is my headgasket.





Edit: I dunno, the whole report doesnt make any sense. My wear numbers do not look that good to me when their sample for average was run for 4900 miles. But who knows if those are the right universal averages...

Also the Sodium is not even that high... 43 instead of 33?

Why would the boron be so high?

[Bryan062087]

Thanks for keeping me in mind, but no I've never run mobil. I'm going to send in another report to blackstone after 3k miles and see what it says, then get serious about either doing the headgasket or figuring out whats causing the problem if thats not it. I've got a long while before I'll get 3k miles too, only driven 200 or so since I changed the oil for that sample.

[Cruiserdrew]

I'd be Ok with that oil analysis. Your wear levels are very low. See what the sodium level is next time you send one in.

[Aseif007]

If your engine had headgasket work done to it before could they have put the HG on incorrectly blocking one of the coolant passages? Just a thought. I would think fan clutch or air in the system but you seem to have that covered. What is the part number of the OEM clutch you've got in there? As mentioned before, how is your timing? Do you have an air leak causing a lean condition? If the cold start injector were adding gas I think that would have a cylinder cooling effect since when you run rich you generally run cooler cylinder temps. And your temp sensor is on the stock location? I would still think fan clutch since it only happens in summer. Good luck!

[Bryan062087]

Just found a possible cause of this problem thanks to Bobby of The Cruiser Company (cruiserco.com).

My timing was way off, advanced to 36 degrees!!!

Weird thing was the truck ran fine didn't ping or anything just overheated as described.

Hopefully this will help my running hot issue with the timing back down to normal.

Also, if anyone is having the same issue, check your timing!

[cruisercobobby]

Well I shot the timing on the truck because his truck idled a bit high (1100) and I couldn't find anything to cause the high idle so on a whim I shot the timing with an adjustable timing light....36 degrees advance.

Now the next problem....I reset the check connector and adjusted the timing according to factory specs and provided a few extra degrees of advance (12) for a little more pep....and now its totally gutless unless its set way up there. Do these trucks just get 'used' to being driven like that, Bryan has informed me hes had it like this since 05'

I have had a few customers Fj62 that just refuse to run correctly at the specified timing specs but nothing this drastic and I dont want to set his timing way back up there just to get his power band back like it was before because I confident that was the root cause of the overheating problem.

Tommorrow Im going to check his fuel filter. fuel pressure, tps setting, his physical idle on the air horn and possibly remove his cats to see if they are clogged. His air flow metter looks untouched so I dont think anyone has messed with the fuel metering setup in there.

Any suggestions would be appreciated

And we have just finshed a manual swap so the kick down cable has been removed from the equation.

[augirthedude]

Maybe physically confirm that the timing mark on the front pulley/harmonic balancer is correct ?

[Aseif007]

Maybe a vacume leak?, or a problem with the ISC? Or maybe somebody "adjusted" the mixture screw on the throttle body. Has the distributor ever been removed? Maybe it is a tooth off? Just throwing out ideas.