Tip & How-To about Cars & Trucks

Rusted bolts

When you see a bolt or screw is rusty or corroded ( such as bolts going thru aluminum) try this. Tighten the bolt or screw a couple of degrees, then loosen and remove. Using this technique presses the rust and corrosion against the back side of the threads, and then the bolt comes out much easier. This stops the rust and corrosion from balling up in the threads and making the bolt bind up.

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torque specs 2003 olds silhouette rocker arm 3.400


Here is a suggested updated torque spec for this engine's rocker arm bolts;
Rocker arms
Step one: Torque to 11 ft lbs then tighten an additional 90 degrees of bolt head rotation. Some guys don't fuss with the torque specs and just get them good and tight. Either way, be careful, as the heads are aluminum. You do not want to over tighten these bolts

Oct 07, 2016 | 2003 Oldsmobile Silhouette

1 Answer

1998 mercury grand marquis cylinder head to engine block torque specs


Tighten in 6 steps. These are torque to yield bolts and new bolts should be used.
1 Tighten all bolts to 28-31 ft lbs
2 Turn all bolts 85-95 degrees
3 Loosen all bolts 360 degrees
4 Tighten all bolts 28-31 ft lbs
5 Tighten all bolts 85-95 degrees
6 Tighten all bolts an additional 85-95 degrees
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Nov 29, 2015 | Mercury Cars & Trucks

1 Answer

Please explain on a 96 cavalier 2.2 it say to torque heads 90 degress?


You are referring to the cylinder head bolt-torque sequence. Here is the instructions, then I'll clarify.

  1. Install cylinder head bolts finger-tight. New cylinder head bolts are recommended.
  2. Tighten bolts in sequence, tighten the long bolts to 46 ft. lbs. (63 Nm) plus 90 degrees. Tighten the short bolts to 43 ft. lbs. (58 Nm) plus 90 degrees.

The cylinder head is made of aluminum. Over-torque of bolts can result in warping or cracking of the head. Also, some of the head bolts go into the water jacket. Those bolts requires a teflon sealer or water will come up through the threads and result in coolant leaks. Use a thin wood dowel to probe the cylinder head bolt holes to see if they bottom out or go into the water jacket.

When you tighten the bolts, do it in the sequence directed, up to the toque specified for each length bolt. Once that has been done, you will make one more circuit of the bolts, tightening each one by 90 degrees. The easy way to do this is to place your torque wrench on a bolt with the handle pointed at 6 o'clock. Tighten the bolt another 90 degrees, or when the handle reaches 9 o'clock. 90 degrees is 1/4 revolution of the bolt. (You can start the wrench anywhere that is convenient to make the 90 degree advance without interruption.)

Hope that helps!

Nov 14, 2013 | 1996 Chevrolet Cavalier

2 Answers

thermostat housing bolts wont tighten up


Pull the housing off and check if the threads are stripped where the bolts screw in. On aluminum, threads can get easily stripped from over tightening. A shop can use tap and die tools to rethread the holes. It shouldn't cost too much.

Oct 21, 2013 | 2001 Dodge Dakota

1 Answer

what is the torque sequence for a ford f250 6.0 motor 2004 model


New Bolts Must Be Used
Step 1 : Tighten bolts 1-10 to 65 ft lbs
Step 2 : Tighten bolts 1,3,5,7 and 9 85 ft lbs
Step 3 : Tighten bolts 1 - 10 Clockwise 90 degrees
Step 4 : tighten bolts 1 - 10 an aditional 90 degrees
Step 5 : tighten bolts 1 - 10 an aditional 90 degrees making this a total of three times in a row 90 degrees.
Step 6 : Tighten bolts 11 - 15 to 18 ft lbs
Step 7 : tighten bolts 11 - 15 to 23 ft lbs
I asume your wanting the head torque.

Jan 13, 2010 | 2004 Ford F250

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