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So did some investigation of my own, first thing was getting my hands on the relevant Hino TSBs for this issue. The coolant sensor in my truck is supposedly the "correct" most recent sensor according to the production date and color coded marking on the sensor. While inspecting the sensor I...

We have two late model Hino L6's in rollback service, and both of them have had multiple coolant level sensor replacements, yet the problem continues to pop up at random times. And yes, we check the coolant level. If you haven't had the wonderful experience of a late model Hino low coolant...

So I replaced the MAF sensor, along with it's housing. When I went to replace the sensor I found one of the mounting screws boss on the housing had cracked and fallen apart, the insert pulled out, and the sensor was cocked in the housing bore. Since the housing was available (with sensor) I...

I was a BMW tech for 20-some years before the frustration made me decide towing suited my mental health better, and during that time we had several OE Bridgestone applications that had unusual wear issues (inside edge wear, cupping, etc.), but the side to side thing is just bizarre. I'm curious...

Both trucks had this odd wear with the OE tires, I'm not sure but I believe they were Bridgestone's. Which would make sense since the truck that is now getting its second set of front tires has Bridgestone's on it, and they were probably replaced like-for-like. Tire life seems consistent at...

If I might ask a follow-up question . . . The MAF sensor on this truck is a Denso 22204-E0010, also identified as 197400-5301. We have a Toyota dealership, so obviously I can obtain this sensor (it is a good Toyota number, for some of the Hi-Lux diesels I believe) substantially less...

Thank you sir, I will discuss these with our repair facility. I believe they tested the charge air cooler as part of the diagnostics that led to replacement of the charge air hoses and clamps, but I will confirm this with them. I doubt this truck has ever had a valve adjustment, and I find your...

If you haven't figured it out yet, if there is any wheel speed at all the system will not let you in the setting menu. It's a safety thing . . . Gregg

I have a 2012 258 in rollback service with a lack of power . . maybe. The truck runs fine, no Check Engine light, rough run, or other obvious symptom. However compared to another, virtually identical truck, and to our other Hinos in general, this truck feels down on power. It accelerates with...

I have two 2025 L6 trucks in rollback service and both seem to have unbalanced front tire wear. The left front tire is wearing notably faster than the right front, to the point that while the left front is nearing or at replacement (3-4/32) the right front measures 6/32. Tire wear on the...

I would read the Hino sub-forum in the Truck Talk section - there is a TON of good information there, and since you didn't give model/year for your truck you can sort through it based on what you have. Gregg

2012 258ALP - when on a long hard pull, for instance loaded on a long grade on the Turnpike, Check Engine light comes on, engine de-rates into limp mode. Checking codes returns the P0087 low rail pressure. If I clear the faults the truck will usually be ok for a while, however sometimes the...

Something to keep in mind: Emissions legality is based on the year of manufacture and equipment required in the VEHICLE - NOT the driveline. In other words, when you put a 2002 driveline in a 1968 Nova this is fine because you are exceeding the required equipment for the 1968 vehicle. On the...

Greetings all I also posted in the Hino specific forum, but thought a post here might also be useful Recently started basic repairs and maintenance on a small fleet of Hino 258 rollbacks. Having a hard time finding resources - like used parts and aftermarket parts. Seems like not a lot of...

Greetings all Recently started basic repairs and maintenance on a small fleet of Hino 258 rollbacks. Having a hard time finding resources - like used parts and aftermarket parts. Seems like not a lot of Hino parts available aftermarket - for example front air brake hoses to the...

First thing I would look at is the ground cable - engine to frame. We have a couple of 258's with starting issues that had bad ground cables.