Engine radiator Koyo or OEM Toyota

I just bought a Koyo, goes in tomorrow and appears to be great quality

Bout to hit 300k tomorrow on my 2012 and I’ll I’ve ever replaced is the radiator and a transmission sensor. All the pulleys are oem

Seems like a loose ground, my s13 did this when the grounds randomly came loose. That said my s13 cluster is so damn slow to react so I run an aftermarket gauge. I have a koyo rad which came with a slot for an aftermarket sensor.

Also i would hope it's not the case, however you mentioned this after an alternator change. I had a 96 civic with a turbo setup and I had an alternator with a failed voltage regulator, all of my aftermarket gauges and temp gauge was acting like this. I would check the volts from the alternator if this is the case, it also ballooned the hell out of my battery..

Koyo Radiator A2807. Great brand and very affordable.

My opinion koyo rad. But any with the heart symbol are favorites.

It’s got an actual Koyo radiator which is a good sign.

My only recommendation after testing several different radiators is to go with Koyo.

My '09 had the bad number, so I bought a Koyo radiator and spent an afternoon swapping it all. That was ~6-7 years ago.

Mine developed a small slow leak out of that nub two weeks after I bought it. Koyo gave me the run around on their warranty, insisting on photos of a destroyed radiator for replacement. I gave up. It’s a shame because it fit awesome and looked great.

My first new car was an ‘82 Toyota Celica. I put 3 radiators on that car within 10 years. The OEM radiator had a copper core and plastic tanks, held onto the core with a crimped clamp all around. I don’t think that they paid much attention to expansion rates and coefficients of expansion of different materials when they designed these, and the seals would eventually give out and begin leaking.