Gen 2.5 blew my engine, replacement engine prep question

BOPOH

Explorer
So it was confirmed by two shops both heads and block are way out of specs and beyond repair. This project will be on hold until summer time, thank you for your help
 

BOPOH

Explorer
We got snow and my DD is not good for it so i search all around for another engine and nothing that looks like mine so i picked up 99 montero 3.5L hoping it will work. So far i had to replace oil pan (top and bottom), oil pick up tube, and oil filter adapter because mine has 2 extra connectors. Engine seems good, even though completely covered in oil, timing belt looks new and only small amount of oil from front driver side cam seal.

I'm thinking to use Ultra Gray Gasket Maker P/N 82194.What sealant would you recommend to use for oil pan?

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BOPOH

Explorer
the first motor i returned without a problem and then we walked around to see if they had like mine which they didn't so they agreed to honor 30 days on the second motor as well. Speaking of that second motor, i got it all together with all accessories except AC compressor and ready to put it in. There is one thing that bothering me, i'm afraid my oil cooler may still have sand in it, do you think i should wash it out first (if so - how) or should i just switch oil filter adapter back to regular one without cooler adapters?
 
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vanatee2000

Observer
Oh that's great!! So many places do whatever they can to get out of used part warranty obligations.

Do you mean sand inside the cooler where the oil goes or in between the fins of the aux cooler? If the sand is internal I don't really know...because that could mean it might be in other places as well and I can imagine few things worse for a motor than sand in the crank case and heads. If it's just in the fins, you might think about getting a new aux cooler since they are pretty affordable. It depends on how you use the truck, but I always think that oil and trans aux coolers are a wise investment
 

BOPOH

Explorer
that's the part of my problem, my 98 winter package has those aux coolers. My original engine that got sand in it is nor repairable because sand shaved/grind everything beyond safe resurfacing limits, that's why i got another engine all together. At this point the only part of powerplant that is still contaminated (i think) is that aux factory cooler, which apparently was not so common because no other engines at the junk yards had adapters for it.

Is it safe not to use factory engine oil cooler?
 

vanatee2000

Observer
If it were me, I wouldn't use it if I even had the slightest worry it was contaminated. I also wouldn't run it without a cooler...I would go to the local parts store or pick one up online, since they are only $60 or $70
 

vanatee2000

Observer
If you had sand in there, are you sure that it's not in the lines as well? I would think that if the cooler had sand in it, and the motor had sand in it, then the lines may have sand in them too...and I can't recall of the top of my head but most cars also have oil cooling lines that are build into the radiator...so you have to make sure those are all clean too.
 

BOPOH

Explorer
If you had sand in there, are you sure that it's not in the lines as well? I would think that if the cooler had sand in it, and the motor had sand in it, then the lines may have sand in them too...and I can't recall of the top of my head but most cars also have oil cooling lines that are build into the radiator...so you have to make sure those are all clean too.

This is the thing i'm talking about, other engines don't seem to have it. If i dont connect it i'm good, as this is the last thing was connected to my oil lines in the old engine
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vanatee2000

Observer
I would be cautious not running it because the oil has to cool somehow..usually this is through a built in cooler system inside of the radiator, which you cant see. If your radiator doesn't have this because of the aux cooler then you will have problems without an aux cooler. I have a 99 and it has a cooling system built internally, inside the bottom of radiator, in addition to the aux cooler. This radiator cooling line may be enough to keep the oil cool, or it may not...I don't know. But if you have an oil line that goes to the bottom of your radiator, you need to make sure there is no sand on their either.
 

Jay Ayala

Explorer
Bopoh,
I would clean out the oil cooler with water and good old liquid dawn dish soap. Supply and return lines included. I would want to continue using that oil cooler. I'm not not an expert with sand contamination, but I'm not exactly sure you will have much contamination. I suppose you won't actually know until you try to clean it out.

I would recommend flushing a few gallons of soapy water through the oil cooler and the hoses with one of those cheap manual fluid transfer pumps you can get at Harbor freight. Use the hose to dump the remains oil in the cooler and the soapy water into a coffee filter so you can monitor how much sand is being removed from the interior of the oil cooler.

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1989 Dodge Raider 3.0L
1997 Mitsubishi Montero 3.5L
 

BOPOH

Explorer
thanks for advices guys! i think you are right and i will use it, but later. I'll use this engine as it came it - w/out aux cooling for now. It's 5F here and got really sick working on this engine. My idea is that if it came like this it will be good for now at least until summer. I'll defenetly flush my radiator, i have that pump and didn't think of it. By the way at the bottom of radiator at least in mine it's transmission oil cooler.

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vanatee2000

Observer
As long as there is something for cooling...you can buy a new aux cooler with all the hose for really cheap, so I would do that rather than using the possibly contaminated oem, if it were me
 

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