Question about Geo Prizm
Posted by Anonymous on
Old posts day... old car , old engine. corolla in sheep skins/
Toy 4aFE engine. that is.
just head bolt torque, no cam caps or other parts on head.
not the squence, you have that, all this and all else is in the mitchells DIY online, why not just log in and read.
the proper question is:
can the be reused, are the TTY, bolts.
is it torque or is it ANGLE
this is the correct question today on all heads. and more.. read it.
not 4A GE ok>? just the FE, i will not do 3 engines. for you or anyone.
On 1988-92 vehicles, tighten the bolts in 3 stages, in the proper sequence. On the final pass, tighten the bolts to 44 ft. lbs. (60 Nm).
ill do the newer engine after all engine swaps are common
what I do is check engine serial number to be sure what is there for , LOOK then leap. stuff happens
On the 1993-97 vehicles, coat the head bolts with engine oil and tighten them in several passes, in the sequence shown, to 22 ft. lbs. (29 Nm). Mark the front of each bolt with a dab of paint and then retighten the bolts a further 90° turn. The paint dabs should now all be at a 90° angle to the front of the head. Retighten the bolts one more time a further 90° turn. The paint dabs should now all be pointing toward the rear of the head.
log in to mitchells and read all 67 steps. some are KEY.
Posted on Oct 23, 2016
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Posted on Jan 02, 2017
Buy a Subaru tech and repair manual $34.95 for 72hrs use I believe it can be downloaded i think around 250MB.. Dave www.techinfo.subaru.com/html/index.jsp
Posted on Aug 08, 2008
frajogag: First off, be aware that these bolts are "torque to yield" bolts (streach bolts). What this means is that instead of torqueing the head bolts to a specific torque specification, they are torqued down to a set spec and then tightened by rotating the bolts a certain angle, like 90 degrees. and all of them are turned the same amount.
This means that the shanks of the bolts must be checked to make sure they are not too thin (or the bolt has already stretched beyond limits and is prone to snap if used)
Here is how you check the bolts. Measure the bolt using a micrometer, at the base, or within the first 13mm from the end where it threads in. Then go to about 10mm before the threads end heading toward the top of the bolt. There should not be more than a 0.23mm (.0091 inch) or less difference or the bolt should be discarded.
Torque the bolts down to 98.1Nm ( 72.ft lb)
Looking at the head from the side, so you are looking at the full length from side to side, I will number the head bolts in this fashion.
#1 & 2 are directly in front of you and in the center of the cylinder head crossing it width wise.
#3&4 are to the left of #1&2, / #5&6 are to the right of #1&2
#7&8 are to the left of #3&4 / #9$10 are to the right of #5&6
Now, you have the sequence.
After the initial pull, back off all the bolts in the same sequence and then retorque them to 36 Nm ( 28 ft lb)
Using a torque angle wrench or having the ability to accurately judge turning angles. Rotate (clockwise) to a 75 degree angle. do this to all the bolts using the sequence I had provided.
Rotate the bolts (clockwise) 75 degrees again on all bolts in the same sequence. The proceedure is complete!
Posted on Apr 23, 2009
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