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Old 02-10-2015, 01:47 AM   #1
alabama_lowlife
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Default Timing Chain replacement on KA24E

OK, these pictures are from me replacing the timing chain on my 1997 Hardbody with a KA24E. I did not take pictures of every single nut and bolt unfortunately. Some of them were simple enough, like the radiator, that I figured anybody should be able to handle. I will give a description of each picture, and hopefully this will help answer a lot of questions. If anybody has pictures of the bolt locations of the timing cover, I would love to add those because I didn't take pictures of all of them.

The picture below show the 10mm bolts that hold the breather tube

The bolts circled in red are for the power steering belt tensioner. They are 14mm. The ones circled in blue hold the idler to the head and will need to be removed as well. They are 12mm.

This is the alternator belt tensioner. They are both 12mm.

This is the pivot bolt for the alternator. It must be loosened in order to remove the alternator belt. The bolt is 14mm and the nut on the back is 17mm. The bolts circled in red are the oil pump. It gets removed AFTER the engine is set to TDC.

Fan clutch nuts. These are 10mm

Air conditioner compressor tensioner. The nut on the pulley is 14mm I think, and the bolt is 12mm. Nice oil leak huh?

These are the nuts and bolts for the power steering idler and the hook for lifting the engine. They are 12mm

The last 2 12mm bolts for the lift hook and some of the timing cover bolts.

Power steering pump bolts. These are 14mm.

Power steering pump bracket. These are 12mm. The blue arrow points to the biggest pain in the butt.

I didn't circle anything, but this is the thermostat housing.

This is how I break loose the crank shaft pulley bolt. It's a 27mm. I rest the breaker bar on the frame and bump the starter to break the bolt loose.

Now you can line the engine up at Top Dead Center. The pointer will be lined up with the mark I have painted white. The pointer will line up with the mark on the compression stroke and the exhaust stroke. You MUST make sure it is on the compression stroke. I show how to verify that in the next 2 pictures. Notice the red arrow pointing to the 10 degree before TDC mark. That's where the pointer should line up when you use the timing light to adjust the timing later. DON'T set it by the one I painted white.



The next 2 pictures show that the rotor is pointing to the #1 spark plug wire. This confirms that the #1 cylinder is at top dead center on the compression stroke. You can also look at the valves for the #1 cylinder and verify they are all closed. THESE PICTURES ARE APPLICABLE TO THE 96-97 HARDBODY. The 90-95 rotor will point to 4 o'clock because that's where the #1 plug wire is for those years.

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Old 02-10-2015, 01:47 AM   #2
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Old 02-10-2015, 01:48 AM   #3
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This is not complete. I'll finish it tomorrow.
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Old 02-10-2015, 05:01 AM   #4
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I've been thinking about the timing chain in my 91 king cab hardbody. Do you know what the recommended mileage is for the timing chain replacement? Mine is at 253k. I was also wondering if any body knew if a newer driveshaft with standard non staked replaceable u joints would fit my 91 auto 4 cylinder? Thanks in advance guys!
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Old 02-10-2015, 09:46 AM   #5
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There is not a recommended maintenance interval for the timing chain. Usually, people replace them because they start rattling frequently. You'll want to ask the driveshaft question in a new thread.
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Old 02-15-2015, 03:27 AM   #6
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did you take your oil pan off or just undo a few bolts and wedge something in there to pull the lip down "just enough"
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Old 02-15-2015, 12:24 PM   #7
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The first time I replaced it I just loosened the front bolts on the oil pan. The guide broke a couple more times and I eventually removed the oil pan to get all the pieces of plastic guide out of the bottom. To drop the oil pan you have to remove the front differential. That was the biggest pain in the ass ever. Which is why I never plan to own a 4wd again lol
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Old 02-22-2015, 09:34 PM   #8
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Thanks for the write-up. Hope to see it completed before I begin on mine.
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Old 02-28-2015, 06:30 PM   #9
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Finally getting to put timing chain in. Been apart for awhile. My question is on the crank does someone have a listing of how spacer/s, sprocket and
oil slinger go in. Thanks
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Old 02-28-2015, 07:01 PM   #10
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