Camaro V8-350 5.7L (1989)
2.
Disconnect throttle, T.V. and cruise control cables. Remove cable retaining bracket.
3.
Remove the 4 throttle body retaining bolts.
4.
Disconnect Throttle Position Sensor (TPS) and Idle Air Control (IAC) valve electrical connectors.
5.
Remove right intake air runner.
6.
Remove air plenum retaining bolts.
7.
Remove plenum and gaskets. (discard gaskets)
8.
Remove EGR vacuum line.
9.
Remove EGR retaining bolts.
10.
Remove EGR valve.
EGR VALVE INSPECTION AND CLEANING
CAUTION: If EGR passages in the inlet manifold indicate excessive build-up of carbon deposits, the passages should be cleaned. Care should be taken
to ensure that all loose particles are completely removed to prevent them from clogging the EGR valve or from being ingested into the engine. Do not
use chemicals or solvents to clean the EGR valve or intake manifold passages chemicals may cause damage to system.
Clean EGR and passage as follows:
1.
With a wire wheel, buff the exhaust deposits from the mounting surface of the EGR valve and around the valve.
2.
Look for exhaust deposits in the valve outlet, remove deposits as needed.
3.
Clean intake manifold mounting surface.
4.
With a suitable tool clean EGR passages in intake manifold, blow ports clean with compressed air.
EVAPORTIVE CANISTER FILTER REPLACEMENT
Every 24 months or 30,000 miles, the filter on an open bottom canister should be replaced.
1.
Remove all hoses from the top of the canister and mark. Remove the canister.
2.
Remove the filter element by squeezing it out from under the lip surface at bottom of canister and from under retainer bar, where used.
3.
Squeeze the new element under retainer bar, where used, and position it evenly around the entire bottom of the canister. Tuck the edges under the
lip of canister.
4.
Reinstall the canister to its original position on the vehicle, following normal service procedures.
5.
Reconnect the hoses to the top of the canister, according to the labeling on top of canister.
PCV VALVE & FILTER REPLACEMENT
The PCV system should be checked every 15,000 miles and also during regular engine tune-ups. If the PCV system includes a breather filter, located in
the air cleaner housing, this filter should be replaced whenever the PCV valve or air cleaner element is replaced. When a periodic inspection indicates
the PCV is not functioning properly, it should be serviced by replacement only.
