Intake manifold is leaking...
Thread Starter
Team Owner
Joined: Feb 2000
Posts: 51,504
Likes: 6
From: Sacramento CA
Intake manifold is leaking...
Is replacing the intake manifold gasket a hard job for a hack?
Already planned on having the injectors rebuilt.. is there anything else I should look into while down there?
Whole new set of vacuum lines is a good Idea...
It's leaking on the passenger siide between the runners, i can catch the coolant pooling up there on top.
[Modified by Nevermind, 12:49 PM 11/29/2002]
Already planned on having the injectors rebuilt.. is there anything else I should look into while down there?
Whole new set of vacuum lines is a good Idea...
It's leaking on the passenger siide between the runners, i can catch the coolant pooling up there on top.
[Modified by Nevermind, 12:49 PM 11/29/2002]
Melting Slicks
Joined: Oct 2000
Posts: 3,426
Likes: 4
From: Heidelberg PA
Cruise-In V Veteran
Re: Intake manifold is leaking... (Nevermind)
If you are pulling your injectors for cleaning, then the intake is just one more step.
The hardest part is being sure the intake seals in front & back. These cars are notorious for leaking in these areas.
Do not use the end pieces supplied with intake gasket sets. Instead, clean up the ends and use a punch on the block and intake about every 1/2 inch to give the sealer something to grab. Good Luck.
The hardest part is being sure the intake seals in front & back. These cars are notorious for leaking in these areas.
Do not use the end pieces supplied with intake gasket sets. Instead, clean up the ends and use a punch on the block and intake about every 1/2 inch to give the sealer something to grab. Good Luck.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Intake manifold is leaking... (Nevermind)
If an L98 get the FelPro intake gasket set, a little extra Black RTV and some gasket sealer.
After you chase the intake bolt and hole threads apply a little gasket sealer to the Torx bolt threads.
Put a thin layer of Black RTV on each side of the gaskets around each water passage hole from the heads.
Clean the front engine lands thoroughly with carb cleaner to remove all old RTV and soil.
Once you have applied the Black RTV to the front and rear block lands, set the intake base onto the gaskets; do NOT move or slide the base once it has thouched the front and rear lands as this can cause leaks.
Torque by sequence to spec and let it stand overnight; retorque the base the next day and reassemble the rest of the intake.
If you see any oil at the rear of the block you might want to pull the oil senders and releal them.
This would be a good time to cut the Grn wire from the EGR temp sensor between the connector and the thick wire harness; splice in a piece of wire to bring that connector up to the right of the dist. for easy access in case you later need to service the EGR temp sensor.
Use a syringe to extract all coolant from the thermostat housing to minimize coolant into the lifter valley when you pull the intake base.
After you chase the intake bolt and hole threads apply a little gasket sealer to the Torx bolt threads.
Put a thin layer of Black RTV on each side of the gaskets around each water passage hole from the heads.
Clean the front engine lands thoroughly with carb cleaner to remove all old RTV and soil.
Once you have applied the Black RTV to the front and rear block lands, set the intake base onto the gaskets; do NOT move or slide the base once it has thouched the front and rear lands as this can cause leaks.
Torque by sequence to spec and let it stand overnight; retorque the base the next day and reassemble the rest of the intake.
If you see any oil at the rear of the block you might want to pull the oil senders and releal them.
This would be a good time to cut the Grn wire from the EGR temp sensor between the connector and the thick wire harness; splice in a piece of wire to bring that connector up to the right of the dist. for easy access in case you later need to service the EGR temp sensor.
Use a syringe to extract all coolant from the thermostat housing to minimize coolant into the lifter valley when you pull the intake base.
