I need toruqe specs and sequence on turbo 350

SOURCE: I need the torque specs and sequence on a 1998 chevy 350 vortec

Vortecs are a little different that old school small blocks, grab a Haynes or Chiltons, the cross patterns and specs are simply diagramed. Vortec, as any really, start with 25# then 45# and then final torque which I believe is around 70-75# but to be sure verify with the manual. AutoZones, Murry's, Adavance auto all carry the books, Cheap insurance.
Dan

Steve Sweetleaf

• 1212 Answers
• Posted on Oct 10, 2009

SOURCE: what is head torque sequence and spec for a 2007

first two.last two middle tighten them slowly not all at once.

SOURCE: I got this far with out a book but now I need specs.

Hello Triker.
Here are the specs on the head bolts.
Using a 10 mm bi-hexagon wrench, install and uniformly tighten the 10 cylinder head bolts and plate washers, in several passes, in the sequence shown. Torque 58 lbft.

Then mark each head bolt and turn each one an additional 90 degrees.
(new head bolts are a good idea to install here)


There you are Triker. Hope your repair goes well for you.
Take care.

KL

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SOURCE: reaplaceing head gasket I need toruq specs for

the final torque setting is approx 80 foot/pounds incrementally if they are tty torque to yield bolts) Depending on the manufacturers of the replacement head bolts some require besides the obvious torque sequence followed either a TTY or a degree tightening after an initial sequence tightening while using the proper 30w , 10W-30 or manufacturers own mixture of molybelenum. Hope this helps.

SOURCE: head bolt torque specs and sequence for early 350 malibu motor

There are two different torque specs for this engine depending on which bolts you are torquing. This engine uses three different length bolts, the two sets of longer bolts can be torqued to 70 foot pounds, the short set of bolts that go along the bottom of the head should be torqued to 65 foot pounds. Head surface and block surface should be clean, straight and the a new head gasket should be used.

An easy way to guide yourself in the proper sequence is to make a cheat sheet of sorts. Take the headgasket and piece of cardboard about the same size. Using the headgasket as a template, mark each of the bolt holes on the cardboard with a sharpee marker, pencil or pen. Also outline the headgasket and mark the top of your drawing. Now starting from the center bolt as number 1, move either to the right or left, up or down to the next bolt hole and mark that as number 2. Now move to the bolt hole diagonally across from number 2, past Number 1 and mark it as number 3. Continue this sequence of moving diagonally back and forth across the headgasket outline until all of the bolt holes are marked with a number. What you are trying to do is start at the center of the head tightening it down in steps of about 15 foot pounds moving out from the center.

I have built a lot of these engines over the years and they are very forgiving of the head torquing sequence. As long as you start at the center and move out left and right, up and down alternating back and forth, you will have no problems. As a final check once you are done, check the torque on each head bolt to make sure you have not missed one. This does not have to be done in any sequence and you will then be sure that you have it completed properly. Good luck.