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Acura Cl Fuel Injection Plenum Gasket Sets

Acura Cl Fuel injection plenum gasket sets

Starting at low prices, AutoBuffy stocks multiple fuel injection plenum gasket sets from top OE-quality brands. The plenum gasket seals the intake plenum to the lower intake manifold, keeping the air-fuel mixture pressurized and contaminant-free. A failed gasket causes vacuum leaks that trigger rough idle, poor fuel economy, and potential engine damage if ignored.

Signs your Acura Cl needs a new fuel injection plenum gasket set

  • Rough or erratic idle that worsens when the engine is cold or under load
  • Check Engine light with lean mixture codes (P0171, P0174, or similar) stored in the ECU
  • Noticeable hissing or sucking sound from the intake area at idle
  • Decreased throttle response or hesitation during acceleration
  • Fuel economy drops noticeably without any other obvious cause
  • Engine stalls at idle or struggles to maintain steady RPM in gear

Which fuel injection plenum gasket set should you buy for your Acura Cl?

The main decisions are material and kit completeness. Plenum gaskets are available in rubber, multi-layer steel (MLS), or composite, and sets vary in whether they include only the primary plenum gasket or every related hardware and o-ring needed for the job. Matching the correct material to your engine's operating temperature and the kit scope to your specific repair saves time and repeat teardowns.

OEM-equivalent composite gasket set
Best for
Daily drivers and factory-spec rebuilds
What you get
Correct thickness, pre-cut ports, and material matched to original specs
Multi-layer steel (MLS) set
Best for
High-output or modified engines with elevated heat cycles
What you get
Superior head-sealing pressure tolerance and resistance to combustion blow-through
Full plenum overhaul kit
Best for
High-mileage engines or complete intake service
What you get
Primary plenum gasket plus throttle body gasket, injector o-rings, and hardware
Basic single-gasket replacement set
Best for
Budget repairs when only the plenum-to-manifold seal has failed
What you get
Primary gasket only — lower cost, minimal hardware, fastest swap

Replacing a fuel injection plenum gasket set on a Acura Cl

Moderate⏱ 1–2 hoursSocket and ratchet set (metric and standard)Torque wrenchGasket scraper or plastic razor bladeIntake manifold cleaner or brake cleanerShop rags and a small pick tool for o-ring removal

Disconnect the intake air duct, throttle cable, and any vacuum lines or fuel injector connectors attached to the plenum, then unbolt and lift the plenum clear of the lower intake. Scrape all old gasket material from both mating surfaces carefully — any residue will cause an immediate leak — and install the new gasket set dry or with the sealant specified by the gasket manufacturer. Reassemble in reverse order, tightening plenum fasteners in the sequence and to the torque range listed in your Acura Cl service manual to ensure even sealing.

Frequently asked questions

How much does it cost to replace fuel injection plenum gasket sets on a Acura Cl?
Parts start at low prices for a Acura Cl plenum gasket set at AutoBuffy. Add shop labor, which typically runs one to three hours depending on engine accessibility, and total repair cost can range from moderate to significant. Doing the job yourself keeps the expense close to the parts price alone.
Can I drive my Acura Cl with a failed plenum gasket?
You can drive short distances, but it is not advisable. A vacuum leak from a failed plenum gasket causes the engine to run lean, which raises combustion temperatures and can damage oxygen sensors, catalytic converters, and pistons over time. Address it promptly to avoid compounding repair costs.
How long do fuel injection plenum gaskets last on a Acura Cl?
Plenum gaskets generally last many years under normal conditions, but heat cycling, coolant or oil contamination, and poor original installation shorten their lifespan considerably. Many fail between 80,000 and 150,000 miles, though engines with higher operating temperatures or previous improper repairs may see earlier failure.
Do I need to replace the throttle body gasket at the same time?
Yes, replacing the throttle body gasket while the plenum is already removed is strongly recommended. The parts are inexpensive and the labor is shared. Skipping it risks a second vacuum leak and another full disassembly soon after. A full overhaul kit for your Acura Cl typically includes both gaskets together.
What causes the plenum gasket to fail on a Acura Cl?
The most common causes are prolonged heat cycling that hardens and shrinks the gasket material, oil or coolant contamination that degrades rubber compounds, and over-torqued or under-torqued fasteners during a previous service. Using the correct gasket material and following proper torque sequencing during installation prevents premature failure.
Is replacing a fuel injection plenum gasket set a DIY job on a Acura Cl?
It is a moderate DIY repair requiring basic mechanical confidence. The intake plenum must be removed, mating surfaces cleaned thoroughly, and new gaskets seated correctly before reassembly. Most home mechanics with standard hand tools and a service manual can complete the job in one to two hours on accessible engine layouts.

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Fuel injection plenum gasket sets for other Acura models

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