24th Aug 2008, 04:37

Mike. Just buy a new radiator. I did and it fixed everything in my 1990 B2600i, all overheating problems fixed. It gets hot quickly if sitting still. Freeway is cooler cause of the air. It acted weird also. Knocked sometimes and other times was fine.

15th Sep 2008, 14:29

I currently own a 1990 Mazda B-2600i 2WD. Great running truck. When I bought it the dealer sold it to me with a blown head gasket, clogged radiator, stuck thermostat, and a busted fan clutch. I bought it at roughly 130K Miles and now it has a little near 154K Miles. I replaced the spark plugs, wires, and distributor cap and the fuel mileage went to about 20 MPG in city. Right now the timing chain needs replacing and I am having some slight trouble with a valve in the first cylinder, but it is still running fine. Has plenty of power for everything I need. Gets around great. Very nice little truck, definitely worth keeping up.

19th Oct 2008, 20:50

I love the little truck too, but I just can't find a rear end. I'd like to get another so I can drive it again. Mine just rolled over 200000 and it runs great and loves the redline. It's a 1990 Mazda B2600i 4x4 SE-5. I just want to find another rear end.

12th Aug 2009, 16:49

I have wanted one of these trucks for a long time!! My goal is to bag one of them!

I have a 1991 Mazda B2600i that I bought with 110k. It has 176 now!!!

It overheated when I bought it! New thermostat and radiator fixed the overheating problem!

I've had to put in a new clutch, spark plugs, brake pads, rear differential (due to me abusing it in the beginning), oil changes! That's it!

I've put two auxiliary fans inside the radiator and one on the AC condenser!

It never overheats, the A/C never gets hot, even sitting for a long time!! I would seriously not trade my truck for anything, I wish the Blue Book on them were higher :-)

I just recently purchased a 1990 Mazda B2600i with 145KI. Had to put in a new ECM, water pump, RADIATOR, thermostat!

I recommend any time you see one of these trucks go up for sale, get it! You might have a few problems in the beginning, but once you work out the bugs they are very dependable vehicles...

PS I would not buy a carburated Mazda; I've owned three and they are hard to pass emissions. My opinion.

29th Sep 2013, 13:29

Most likely you have a head gasket problem.

19th Jan 2018, 22:21

I have a 1990 Mazda 4x4 SE 2.6 fuel injected. It has about 300 thousand miles on it. Last summer it went missing on number 3 cylinder. It is getting spark, it has 150 PSI on number 3, but it misfires. I have been trying to troubleshoot my problem, but I'm at a crossroad; it has 90 PSI on #1, 30 PSI on #2, 150 PSI on #3, and 120 on #4. Anybody have any suggestions?

6th Apr 2019, 02:04

If it was a bad head gasket, it would run hot all the time, not just up hills; it's probably the radiator causing it to run hot.