Friend's 1990 Sentra - blown head gasket

[fredjacksonsan]

Hey all, a friend was coming to visit me and blew his head gasket along the way. I'm going to help him replace it tomorrow, but we don't have a tech manual with the head bolt torque specs.

Does anyone have the torque figures for the head bolts? Also, is there a figure for the valve train? Thanks much in advance....

[fredjacksonsan]

Sorry, it's the 1.6L 4 cylinder. Thanks...

[SR20B12]

Originally Posted by fredjacksonsan

Sorry, it's the 1.6L 4 cylinder. Thanks...

why even post??? if you don't know.

head bolts bynthe manny says.
bolt nos1-10 step1:22ft. step:2 47ft.
bolt nos11-15 torque last , to 72in lbs.

-5
3
------ 7 13 15 10 8

------9 11 14 12 6
2
-4 1


front of engine bay looking at head.

this is your loosen and tighting pattern.

hope this hlps need more info plz ask.

chip

[fredjacksonsan]

Originally Posted by SR20B12

why even post??? if you don't know.

I did know, just forgot to put it in last night.

(Thanks btw for the response) but I want to clarify:


1-10 22 ft-lbs, then 47 ft-lbs

then 11-15 to 72 inch-pounds?

We haven't taken it apart yet, so I'm thinking those bolts are a different size to have that much of a difference.

Also, this is the 12-valve motor, 3 valves/cyl. Do you know if this is the dohc version, and any specific tricks of note? (I've done inline 6's and V-8's, but they were all pushrod)

[SR20B12]

Originally Posted by fredjacksonsan

I did know, just forgot to put it in last night.

(Thanks btw for the response) but I want to clarify:


1-10 22 ft-lbs, then 47 ft-lbs

then 11-15 to 72 inch-pounds?

We haven't taken it apart yet, so I'm thinking those bolts are a different size to have that much of a difference.

Also, this is the 12-valve motor, 3 valves/cyl. Do you know if this is the dohc version, and any specific tricks of note? (I've done inline 6's and V-8's, but they were all pushrod)

No. I'm sorry I miss read the post It's not your falt. forgive the
rudeness . your trying to get help

the Ga16I is a SOHC . you could call it a bridge motor for the GA16DE
11-15 start at 22ls. than to a max of 72. the book says 56-72 so any
where in ther should be fine.

tighting them all to 22lbs and loosen than retighten to the 47 for 1-10,and 11-15.

trick ? I don't know any on this engine sorry. other than go out and buy a manual just in case you run into somthing you don't know.

hope this helps. chip


11-15 to 56-72 lbs.

[fredjacksonsan]

Thanks for you help; but it's for naught. He'd had the head gasket replaced before, and the head is warped. We're going to look for a junkyard motor for him.....

Appreciate the input! Didn't think you were rude.....