My latest discovery (occurs daily) on my 86 4Runner is that my exhaust manifold has a 1 inch crack in it right above the O2 sensor. I slopped on some patch in a tube from AutoZone, but will want to replace it shortly.

I'll likely get one local at a scrap yard. However, when researching online on ebay I was noticing that many were listed as 88-95. I was expecting 85-95 to be same.

Can someone tell me what year range I should be sourcing a replacement from?

Thanks!

 

I believe 89-95 should not have an O2 sensor port on the exhaust manifold. The 85-88's should have the port. I believe you need to get the y-Pipe that goes with its year.

 

I believe that in or around 1988, the EFI system was modified from using one O2 sensor to then two. Not 100% sure about that fact but I think that in the later models they do have an O2 placed right around the Catalytic converter either before or after...Like I said not 100% sure could totally be wrong.

If I were you, be sure to purchase an exhaust manifold that does have the O2 sensor bung in the original location. Had a heck of a time myself with this issue when installing an OBX header, and my truck ran like a datsun for two weeks before a $8 bottle of seafoam and 35 miles of redline driving cleaned everything out.

Plenty of reasonably priced exhaust manifolds on ebay for the 86 pickups starting around $60 for the cheapest.

 

I was hoping my 88 and 94 would crack so I can replace it with a header. lol

 

Sounds like you're the guy to confirm whether 88 and 94 are different

 

'85-'87 22res had the O2 sensor in the exhaust manifold. '88-'95 had them in the down pipe.

My '88 22re was similar to my '95 22re.

 

Hey guys bringing this back. Got an 87 22re that I wNt too put headers on. Will the exhaust port from a 90-95 match with my 87?

 

To be clear want too know if they match, not if they are close. Time is my biggest enemy. Don't wanna have to screw around with returns (buying on eBay)

 

You can put the Oxygen sensor bung where ever you need to to match what you have.

 

So beside O2 sensor location they should match up?
My stock manifold has the o2 bung, the header I want has it in the exhaust pipe. Not worried about that, the bolt and exhaust port holes matching are my only concern.
Thanks for the quick reply