1990 Honda prelude 2.0 4 cylinder is my engine interference
"All Honda engines are Interference except 3.0L & 3.2 which are Non-Interference."( but does not cover year 1990,) so is lie. (all means modern, not 1990)
not told which 2.0L is there VIN or country.
the names of gen3 car engines is here.
IN USA (are you) we had the SOHC and DOHC engines. both,(options)
they year some are.
in Gas world, DOHC are mostly interference.
there exceptions
B20A/B20A1 - 2.0L DOHC PGM-FI 160/143 PS (Japan/Europe)
B20A3 - 2.0L SOHC 12v carb 104 hp North America
B20A4 - 2.0L SOHC 12v carb 114 PS (84 kW)Global, except North America
B20A5 - 2.0L DOHC PGM-FI 135 hp (101 kW) North America (interference engine)
B20A6 - 2.0L DOHC PGM-FI 142 PS (104 kW) Oceania
B20A7 - 2.0L DOHC PGM-FI 150 PS (110 kW) Europe, New Zealand
B20A8 - 2.0L DOHC PGM-FI 133 PS (98 kW) Europe
B20A9 - 2.0L DOHC PGM-FI 140 PS (103 kW) Europe
B21A - 2.1L DOHC PGM-FI 145 PS (107 kW) Japan (SI States)
B21A1 - 2.1L DOHC PGM-FI 140 hp (104 kW) North America
the truth is,
we put on a new belt and do leak down test.
if fails look for bent valves.
NO belt there test.
or super brave and by HAND only
put crank and TDC mark 0 zero. at damper pulley edge scale
turn the cam cog wheel (cam) by hand, with socket wrench feel of valves hit. ( all interference engines will)
VVT on newer car is more complex answer but not here.
there is always luck.
belt slips a bit , retardds the cam and stalls before it hits. luck happens, like walking a cross a city street blind folded, I say why even ask, just do it.
most DOHC engines with 10:1 compression ratio are interference, but if is the turbo version those are not.
mostly, (vast engines types exist, and nobody knows that it seems)
if you watch a 4cycle engine simulator
see how the piston chases the exhaust valve closed
the piston wins, on some engines it bends it.
some engines with notched piston tops are free running engine.
also honda's this old had the B20B swap put in.
only you can read engine serials. b20b is interference.
Do I have to say do not crank any engine for sure on any DOHC if the belt fails.(slips or snaps)
do a leak down test. not cranking,
my mazda mx5 had 1.8 Liter, free running, engine
but was turbo version but no turbo fitted new.
had low natural compression . see?
One guy had DOHC engine and the PO wrecked the DOHC head and put on the SOHC head. (FREE RUNS)
33 YEARS OLD THINGS HAPPEN
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