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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 02-12-2005, 03:12 PM   #1
westrides
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Default 5.0 torque specs heads intake upper lower

im trying to put my engine back together i need the torque specs for the heads and intake upper and lower for my 88 5.0
thanks
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Old 02-12-2005, 03:22 PM   #2
roundman
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Default RE: 5.0 torque specs heads intake upper lower

from my '88 shop manual the specs are: cylinder heads - torque in two steps, 1st step 55-65 ft-lbs, 2nd step 65-72 ft-lbs.
intake manifold to cylinder head bolts - 23-25 ft-lbs. with a note to re-torque with the engine hot
upper intake manifold to lower- 12-18 ft-lbs.
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Old 02-12-2005, 03:29 PM   #3
westrides
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Default RE: 5.0 torque specs heads intake upper lower

thanks roundman can i put the push rods in at the same time as the head go on witout loosing off the rockers
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Old 02-12-2005, 03:34 PM   #4
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Default RE: 5.0 torque specs heads intake upper lower

NO, don't even try doing this!!! remove the rockers completely and install the heads and torque them down to specs using new head bolts as the factory bolts are "torque to yield" bolts which are only good for one use. then install the pushrods and the rockers and torque the rockers to spec and then install the lower intake.
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Old 02-12-2005, 03:41 PM   #5
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Default RE: 5.0 torque specs heads intake upper lower

i was told that 92 and up i cant use the original bolts but mine i could
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Old 02-12-2005, 04:17 PM   #6
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Default RE: 5.0 torque specs heads intake upper lower

You might be right as I've looked back in the shop manual and it doesn't say anything about not re-using the head bolts for the '88 model year 5.0 but I know I've read that stuff about torque to yield bolts for so long I thought it applied to all 5.0's, not just the newer ones.
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Old 02-12-2005, 04:24 PM   #7
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Default RE: 5.0 torque specs heads intake upper lower

What do you set the rocker arms at when you put them back on?
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Old 02-12-2005, 04:46 PM   #8
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Default RE: 5.0 torque specs heads intake upper lower

18-25 ft-lbs.
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Old 02-12-2005, 05:23 PM   #9
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Default RE: 5.0 torque specs heads intake upper lower

alright thanks
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Old 02-12-2005, 06:31 PM   #10
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Default RE: 5.0 torque specs heads intake upper lower

Tourqe to yeild bolts were used on fords aluminum head engines. The cast iron head engines used re-usable headbolts.
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Old 02-12-2005, 06:31 PM
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