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Discussion Starter · #1 ·
OK I found a 99 4.2 V6 at the junkyard. The front end on the truck doesnt look like it was smashed or anything so I have a few questions.

1. What can I do to figure out if this motor works?
2. When I pull this thing and do the 3.8-4.2 swap should I just tear down the whole thing?
3. is $440 a good price for this thing?
 

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440 is a pretty good price for that but I would do a compression test and just have somebody really look it over I'm wondering the same thing now I'm trying to put a yr 99 3.8 in my 94 3.8 also look around on the thing is there's any oil leakage around the gaskets you don't want
 

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Discussion Starter · #3 ·
440 is a pretty good price for that but I would do a compression test and just have somebody really look it over I'm wondering the same thing now I'm trying to put a yr 99 3.8 in my 94 3.8 also look around on the thing is there's any oil leakage around the gaskets you don't want
How would I do a compression test in the junk yard?
 

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Pulling a spark plug and draining the oil can also tell u a lot. I mean if it's still mostly together bring a battery with and try starting it
 

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Discussion Starter · #5 ·
Pulling a spark plug and draining the oil can also tell u a lot. I mean if it's still mostly together bring a battery with and try starting it
I am pretty sure they drain all fluids before its brought in. Seeing if it will roll over won't tear it up will it? If they have drained the oil? I mean as long as you don't keep on doing it.
 

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If you spin in manually with like a wratchet you'll be fine but the only thing that proves is that it's not locked up. See if they have any info about the mileage and look into more info on that motor because I know some of the earlier 4.2s had a lot of problems but I'm not sure about the 99's
 

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Discussion Starter · #7 ·
I would have to get a battery to check the mileage. Thats not hard to do. I have seen that the 99 4.2 and my 00 3.8 will be good. But I didnt want to go pull a motor in a junkyard, just to get it home and be screwed.
 

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Yeah I know what you mean. It's always a gamble getting one from a junkyard. I was looking at swengines.com and they would ship a 4.2 out of an 04 f150 to me for 1500$ with a 1 year warranty. Yeah it's a lot more than 500 but you get that extra insurance
 

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Discussion Starter · #9 ·
Yeah I know what you mean. It's always a gamble getting one from a junkyard. I was looking at swengines.com and they would ship a 4.2 out of an 04 f150 to me for 1500$ with a 1 year warranty. Yeah it's a lot more than 500 but you get that extra insurance
The only issue with that is I dont think the warranty would cover me tearing the engine down and making the Stroker I want to with my 3.8.
 
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