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Answering "Where is engine coolant drain plug for a 1.8 Nissan sentra engine?"
The location is engine specific. Which model Sentra do you have and which engine does it have?
NO SE TU....
Should be a drain plug either at bottom or rear of radiator or remove lower hose
Has the Sump drain plug been put back in and tightened
0.044
SPARK PLUG GAP2002 Nissan/Datsun Sentra 1.8L SFI DOHC 4cylThe Spark Plug Gap.043 (In thousandths of an inch)
0.044
there's a fill plug on the front of the case. if your going to go through the work to add fluid, you should drain all of it and clean off the magnet on the end of the drain plug.
For a Nissan Sentra with a manual transmission, the transmission has two plugs . One is a filler plug, which is on its side near the front driver-side tire and clutch cable, and the other is a drain plug, which is at the bottom of the transmission. To add fluid, take off the filler plug and add fluid (most likely 4-GL). REMINDER: if you plan to replace the old transmission fluid, make sure you can remove the filler plug before you drain the transmission.
.044 for a 1997 model
31mm