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Does anyone know if this engine is an "interference" engine, where if the timing belt broke, there would be impact between pistons and valves?

The VIN is 1HGCA5428HA021477
 

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I had a 1986 Accord 4 dr LX auto trans, 4 cylinder, I am here to tell you than when my timing belt broke, my engine suffered bent valves from the pistons hitting them.

I would say that the engine in my car was most assuredly an interference engine.

Your results may vary.
 

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Had a belt break on our '89. No damage. Put on a new belt and was good to go.

Consensus (?) on 3geez say it's non-interference



Some people think earlier engines with code BS/BT may have been different than the A20

https://en.wikipedia.org/wiki/Honda_Accord#Third_generation_(1985–1989)

The Accord's available engines varied depending on its market: Japan received the A18A, A20A, B18A, B20A and A20A3 (US imported cars); Europe received the A16A1, A20A1, A20A2, A20A3, A20A4, B20A2, and B20A8; Australia and New Zealand received A20A2 and A20A4; other regions received A20A2 and/or A16A1; while United States, Canada and Taiwan (US imported cars) received the A20A1 and A20A3. On Accord 1986 model year engine block was marked as BS and BT in the United States, BS1 and BT1 in Canada, this cars had chassis code BA. Since 1987 the engine block in Indonesia was marked as NA instead of A20A2. The engine block in Thailand was marked as A.
 

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Honda
• All Honda engines are interference except 3.0L & 3.2 which are Non-interference


Does Honda have interference engine?
All Honda cars from 1984 through 1996 have interference engines. The engine codes include ES2, ES3, A18A1, A20A1 and A20A3 in the 1984 through 1989 Accord and Prelude. The engine could be a 1.8- or 2.0-liter engine.

All Honda cars from 1984 through 1996 have interference engines. The engine codes include ES2, ES3, A18A1, A20A1 and A20A3 in the 1984 through 1989 Accord and Prelude. The engine could be a 1.8- or 2.0-liter engine. From 1990 until 1997, the Accord and Prelude used a 2.2-liter engine with an engine code of F22A1, F22B1 or F22B2. From 1995 through 2000, the Accord 2.3, Odyssey 2.2 and Odyssey 2.3-liter engines with engine codes F22B6, F23A1, F23A4, F23A5 and F23A7 are all interference engines. From 1995 through 1997, Honda also used a 2.7-liter V6 engine in the Accord, with an engine code of C27A4. Throughout the years, at least until 2000, according to AutoData’s Timing Belts for Domestic and Imported Cars, Vans and Light Trucks, Honda’s vehicles all featured interference engines.


 
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