I know that. That wasn't my question. I was curious if you'd every heard of some place checking the casting numbers?
What donor engine for a 4.6 stroker build?
- Thread starter Bammo68
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I know that. That wasn't my question. I was curious if you'd every heard of some place checking the casting numbers?
i have never lived in a nazi smog county.always just apon bringing it into the state or selling/buying. When doing engine swaps smog referees can and do check things like engine numbers to see if it is what you claim though.283 or a 400?part of why the stroker 6 is nice. You aren't applying for an engine swap.
We have no idea what its like over there. He'll have to tell us.hopefully the links we provided can get him a block his accessories and motor mounts will work with.
I know nvh means noise vibration harshness and my ‘92 block stroker definitely makes a little more mechanical racket than the stock motor in my 97. But what other differences are there? Is the newer block stronger, more reliable etc?
A stronger block with more material in the mains and other places. Does it really matter for either of us? Probably not.
I did some more reading and it sounds as if the main bearing girdle was one of the big changes and that can be added to older blocks but also needs to be shimmed to run the nearly .5” longer stroke 4.2 crankshaft which, in turn requires oil pan mods. Any of that sound correct? I think I saw @SkylinesSuck modified the oil pan for girdle clearance?
Girdle is nice but not necessary if you don't slam it too hard.
Yep,we both used a hammer on the front of the pan for the little bit of clearance. It isn't a big deal. Keep in mind that changing main bolt torque and fastener type can change bearing clearance and bore shape. Thats the kind of thing you do on a bare block so you can measure it
At present, this is purely curiosity on my part. But thanks. I enjoy the discussion.
Figured I'd better throw in the warning. It reminded me of guys tossing arp bolts into connecting rods and having hit or miss clearances.
Good links. Appreciate that. Your profile says 3.0 under engine; Toyota, BMW, Hurricane…typo?
OP
Smog isn't really a thing here in Western Australia - we get a honking sea breeze every day that blows fresh air off the southern and Indian oceans across the entire city. Also helps we have 1 city of 2M pop in a state that's larger than CA, NV and TX combined! We have emissions controls but they were introduced in the early 1980's and aren't incremental in the way they are in the US.
So long story short, there are no real impediments to doing an engine swap from one year to another here - if its fundamentally the same engine just with slightly different plumbing that's OK.
You are going to have to massage the pan if you run a girdle regardless of what year the block is. But at everyone says, is really a non-issue. Running no girdle won't kill you either though. Many 4.2s and 4.0s lived long lives from the factory with no girdles.
Not me? Don’t know wtf that even is? Yeah a typo, my yj has the stroker, it came from my cj that got totaled. The lj will probably stay stock.
Dude, that’s just wrong….
The engine, I do have a 4.2 crank and rods, stroker pistons, but the pcm program is a pita so I will be happy with a 4.0
OP
I've tracked down a couple of motor options locally. One is from a running 98 and the other is from a wrecked 02 (both TJs). I've read through @Chris guide to block interchangeability and noted the warnings about engine mount locations being different between the XJs and ZJs over that transition period.
Its not clear to me if the 2002 TJ 4.0 block going into a 99 TJ would have these same issues? Does anyone know for sure? I'd also like to be able to move all my 99 accessories across including the new A/C system I just got working but its the engine mount locations I'm really focused on if anyone knows...
Its not clear to me if the 2002 TJ 4.0 block going into a 99 TJ would have these same issues? Does anyone know for sure? I'd also like to be able to move all my 99 accessories across including the new A/C system I just got working but its the engine mount locations I'm really focused on if anyone knows...
Post in thread 'What donor engine for a 4.6 stroker build?' https://wranglertjforum.com/threads/what-donor-engine-for-a-4-6-stroker-build.67980/post-1263887
OP
Cheers guys - just found the Jeep Strokers website and starting the deep dive now! My wife saw the title of the website and I think its just confirmed in her mind that Jeeps = Porn addiction... 
hardtailpan
TJ Enthusiast
I believe @Chris guide is pretty thorough. So in my opinion, these are the only ones you should consider if you want to make this as easy on yourself as possible:
- 1991 to 1995 Wrangler YJ and 1997-1999 Wrangler TJ 4.0 blocks will interchange in XJ / ZJ and vice versa.
Anyway, I'd stick with one from the vehicles mentioned above. Good luck and be sure to start a build thread!