How to Replace the Oil Collector

Anders686

So, we’ve determined that before any oil seals are replaced, we need to check and replace the oil trap. Let’s get started.

Note: Always disconnect the negative battery terminal before starting any major repair.

The oil trap is located under the intake manifold, so the intake needs to be removed. Photo 1 also shows the intake oil leaks around the top of the engine.

Disconnect the throttle cable (See Photo 3) and the hoses from the vacuum tree (See Photo 4) and intake housing. There were five vacuum hoses on our turbo model.

Remove the lower hose from the IAC valve, then remove the turbo intercooler to throttle housing tube. Be sure to check and clean all the vacuum ports on the tree and at the other ends of the hoses where they go into the turbo duct by the turbo (See Photo 5). The hoses will also become clogged over time.

The spark plug cover must be removed to access the hose that comes from the oil trap (See Photo 6). Oil all over the cam cover is a good indication that the oil fill cap gasket is leaking. This is also an indicator that the oil trap is plugged. (See Photo 7).

On this model, the fuel rail does not have to be removed. Just relieve the pressure on the system and disconnect the feed and return lines. Unplug the injectors and be sure not to lose the plug gaskets (See Photo 8).

While not necessary on some models, it’s easy to remove the cooling fan assembly, which gives you a lot more room to work.

If equipped, the EGR tube and EGR temperature sensor will need to be disconnected. Also disconnect the throttle position sensor. (See Photo 9).

Remove the upper intake bolts and loosen the lower intake bolts. The bottom bolt holes are slotted, so the bolts do not have to be removed. This makes assembly much easier.

There is also a bracket under the intake that will need to be removed before the oil trap can be removed (See Photo 10).

We are now ready to remove the two bolts that hold the oil trap to the block (See Photo 11).

Disconnect the hoses and remove the oil trap. This one wasn’t the worst, but it was bad enough. The lower port was plugged only halfway. This is the passage that goes down into the oil pan (See Photo 12).

If it’s plugged, the oil pan should be removed to properly clean the passage.

Our car had 160,000 miles on it, and all the hoses were very hard and brittle. We replaced the oil trap and all the hoses and clamps going to it (See Photo 13). There’s nothing worse than having to go in and replace them later.

You will need the engine serial number to order the correct parts. The serial number is located on the timing cover (See Photo 14).

Clean the passages in the block, being careful not to push any debris into the engine block.

Once the oil trap and related hoses are in place, the intake manifold can be replaced. Photo 15 shows the lower intake bolts holding the gasket in place to ease installation.

Reconnect the EGR tube and temperature sensor. Install the cooling fan and reconnect the fuel rail.

Once everything is back together, I recommend degreasing the engine and adding dye to check for any persistent gasket or seal leaks, which you can then repair.

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