Does a 1989 daihatsu hijet have an interference engine?

#1 · January 7, 2022, 8:44 pm

I am learning new things as I go, with the kei trucks, and in the process of exploring and learning the Daihatsu Hijet, I find myself with a bunch of questions. One of them is distinguishing between interference and non-interference engine, and as to whether a 1989 Daihatsu Hijet runs on an interference engine.

#2 · January 7, 2022, 8:58 pm

Indeed everyone goes through the steps of learning and understanding the vehicles that they have. Vehicle engines can either be classified as either interference or non-interference engine types. This depends on how the synchronization of the valves behaves when it is lost. The most notable difference that should be clear to you is the positioning of the valve. For a non-interference engine, there is a gap between a fully open valve and the piston which is on top

Usually, a non-interference engine, in case you have a scenario where the timing belt breaks, the engine stops running. This is usually seen as a big advantage as compared to the interference engine system which will not stop the engine. For a non-interference engine, you will just have to replace the belt in most cases and at worst do re-timing on the engine. This is not the case for an interference engine system setting which demands a lot more.

#3 · March 15, 2022, 7:02 am

Yes of course, for an interference engine on Daihatsu hijet, timing belt has to be changed out every 60,000 miles.

#4 · March 15, 2022, 6:04 pm

Daihatsu Hijet is equipped with an Interference Engine. When belt snaps, you are going to face hoards of problems as the pistons and valves occupy the same space at different times. Remember to check the condition of belt and change it early on detecting defect to avoid expensive maintenance cost.

#5 · March 17, 2022, 2:40 am

Interference Engine is widely accepted by most manufacturers to reduce cost and to increase the vehicle's efficiency, as it doesn't require any other stand-alone part to control the engine. Daihatsu Hiject has also implemented this interference engine model. Here timing belt synchronizes all the other parts of the engine. So if it breaks, your power steering, power brake, and everything fails. No need to worry, we just have to replace it every 50,000 or 60,000 Km for safety.

#6 · March 17, 2022, 12:05 pm

An interference engine is one that has insufficient clearance between the valves and pistons if the cam stops turning due to a broken timing belt. This makes the engines more efficient by boosting compression ratios.

#7 · March 30, 2022, 2:56 pm

Yes Hijet models have interference engine as well. Timing belt synchronisation is the most important thing in interference engine. Because it synchronizes all the other parts of the engine such as power steering, power brake etc.