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How do you take off the head on a Saturn dohc?

Updated: 8/18/2019
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13y ago

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OK, lets start with a few assumptions...like, you have a decent selection of tools and have a fair amount of experience. This is not a small job! It will take 4-6 hours and patience. Lets get started. Two things that are really important..1) the engine should be cold...aluminum will warp. 2) if you have a theft deterrent radio, you better have the activation code or make sure the system is shut off before doing anything. Here we go;

a) READ THIS PROCEEDURE OVER COMPLETELY BEFORE DOING ANYTHING!

b) WHEN SCRAPING OFF OLD GASKETS...BE EXTREAMLY CAREFUL NOT

TO GOUGE

c) THE ALUMINUM HEAD AND BLOCK. IT DOESN'T TAKE MUCH PRESSURE, SO

BE CAREFUL !!

0) Soak the exhaust manifold bolts, on the engine and on the exhaust pipe,

overnight with penetrating oil [PB Blaster]

1) Disconnect the battery, negative cable first

2) Remove the coolant from the radiator and the block. Make sure to keep it

covered as cats & dog like to drink it and it WILL KILL them!

3) Remove the exhaust manifold. Use a little caution as the nuts are devils! When

you put the tailpipe to manifold back togather, put a little Never-Seez on the bolts.

4) Remove the intake manifold. Be sure to mark the injector wires, IAC valve,

coolant sensor, MAP sensor, and the TPS sensors as well as all vacuum and

heater hoses.

5) Remove the valve cover. New gaskets will save you a blown engine down the

road.

6) Remove the timing chain. A new chain and sprocket would be nice if you

have high mileage.

7) Remove the Alternator. Make sure to mark the wires.

8) Loosen and remove the Power Steering pump, but DON'T take off the hoses.

Support the assembly with a little wire so it's out of the way.

9) After checking and removing any misc. wires, etc. now place a block and a jack

under the right side of the engine. Place a small amount of pressure to keep the

engine from dropping in the next step.

10) Now, remove the right engine mount.

11) Last, remove the cylinder head by loosening the 10 cylinder head bolts.

CAUTION !!! Loosen the bolts, one at a time [ 1/4 turn at at time ] in the following pattern. Start with the middle rear bolt, then the middle front, then the second from the left front, then the second from the left rear, DO YA SEE A PATTERN... You are working in an expanding circle outward from the middle. When you put the new head on put the bolts in and start the tightening sequence the same way...working from the middle out to the edges. DON'T FORGET, when you put the bolts back in to coat them with a little motor oil before insertion. Torque them first all to 20-25 ft-lbs, then all to 37 ft-lbs, and last an additional 1/4 turn.

NOW, lift the head slowly straight up and set on 2x4's or some wood...NOT ON

THE GROUND !!!

CLEAN EVERYTHING, REMOVE OLD GASKET MATERIAL ***CAUTIOUSLY***

Reverse the sequence above to reassemble. HAPPY MOTORING !!!!

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