BLOWN head gasket on 2002 nissan sentra 1.8 - Nissan Forum
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#1 Old Oct 13th, 2009, 10:30 AM
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BLOWN head gasket on 2002 nissan sentra 1.8

Hello guys and sorry if this is a double or triple post. I have search the forums here for a couple of days and I havent gotten any answer to my specific question therefore i figuere i better post it up before i make a bad decision.
I basically have a blown head gasket, my car has 106,000 miles on it. Which in my opinion thats not that many miles for a NIssan.
My question is... how involved is it to change a head gasket, is there a manual in particular that really helped you do the job if you have taken on this task? I have the dealer manual but i think is too detailed and im not sure i understand all the they are saying for example there is a piece on the manual that says something like
set NO. 1 piston at TDC on its compression stroke.
I mean there is got to be something a little simpler then this. I've worked on car for years adding and removing part but this just sounds like its crazy. can someone please help me. I cant afford a new car and i dont want to pay the dealer 1200 to do this job which im confident i can acomplish on my own.
Thanks in advance
everyone
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#2 Old Oct 13th, 2009, 03:39 PM
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BUMP
can anyone throw me a bone on this one?
#3 Old Oct 13th, 2009, 06:43 PM
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All that number one cylinder on compression stroke means is that the cylinder in number one bore is at the top of its stroke on compression [all valves on that cylinder are closed. This is very important for setting the timing and putting on the timing belt with all of the timing marks correctly aligned. All manuals will have a similar instruction. The factory manuals are a little harder to follow than some others. Just make sure you fully understand everything before starting work and you should be ok. Best of luck.

Aussie 1986 N12 PULSAR 24 years,250000km one owner, still going strong!
#4 Old Oct 13th, 2009, 08:00 PM
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Originally Posted by pulsar86 View Post
All that number one cylinder on compression stroke means is that the cylinder in number one bore is at the top of its stroke on compression [all valves on that cylinder are closed. This is very important for setting the timing and putting on the timing belt with all of the timing marks correctly aligned. All manuals will have a similar instruction. The factory manuals are a little harder to follow than some others. Just make sure you fully understand everything before starting work and you should be ok. Best of luck.
thanks Pulsar i just bought the haynes manual for the nissan sentra. it looks a little easier to follow but im not sure . Anywho I'm going to continue to study the book and hope i can get this done.
Thanks for the reply.
#5 Old Oct 14th, 2009, 04:13 PM
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Search and read some more.
One tip is to zip tie the chain to the cam gears so they dont move, make re-assembly and timing the camshafts easier.
Good luck.

2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold
#6 Old Oct 14th, 2009, 04:34 PM
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Unhappy

Thank you eveyone for the replies thus far. Does anyone know if i have to remove all the pullies on the side of the car or just the water pump pullie. I have removed all the belts and drained all fluids and pretty much disconect all electrical. and i have also remove the valve cover. now im at a standstill because I just dont know what to do next. do i start taking the cams apart or do I know i have to remove the front exhaust tube do i just remove the 4 bolts at bottom of the car? sorry for all my stupid questions i just hate to have to remove parts that at the end were unnessesary to remove...
Thanks everyone.
#7 Old Oct 14th, 2009, 04:50 PM
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I haven't done this to this engine but recommend you follow the FSM or haynes manual.
give me a few minutes and i will see what i can find

2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold
#8 Old Oct 14th, 2009, 04:55 PM
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I dont have this FSM, If I get time I will research and reply late tonight.

2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold
#9 Old Oct 14th, 2009, 06:23 PM
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i have the manual hell i'll even give you the manual if you want. but its not very clear... this is why im confused. i really appreciate you taking the time to reply to my questions i never felt so losed in my life.
Thank you.
#10 Old Oct 14th, 2009, 11:21 PM
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Ok how far are you down this list, more to follow

2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold
#11 Old Oct 14th, 2009, 11:22 PM
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2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold
#12 Old Oct 15th, 2009, 04:52 AM
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im on number 5 right now because i have two problems what is the front exhaust tube? it says to refer to ex3 but nothing on the chapter calls it front exaust tube... then i also have a problem with the timing chain do i have to remove it. Man i hope this post helps someone else down the line. this is almost a walkthrough. rocker bolts have been removed and that rocker is already off... you are the man IAN
thank you.

Last edited by miguel83; Oct 15th, 2009 at 04:55 AM.
#13 Old Oct 15th, 2009, 08:24 AM
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#6 disconnect the exhaust from the bottom of the exhaust manifold.
once all the intake connections are free it says remove exhaust manifold.
rear intake supports are underneath the intake

2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold
#14 Old Oct 23rd, 2009, 07:33 PM
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PHEW I got the head off.

OK guys the head is off i must say not the easiest job to do but i was able to get it done. Now i have a few basic questions.
Should i clean these parts if so how?
what kind of cleaner should i use?
also the car has 109,000 miles is it really nessesary to change the timing chain?
how do i know if I have a warped head if i do should i buy a new head? can i buy a new head? where would I buy a new head from? suggestions?
I really like to make sure that when i put the new gasket back everything the leak ceases but i guess there are not real guarantees thats why i like to take a few precatuonary measures before putting everything back.
Any answers to my questions would be really appreciated.
#15 Old Oct 23rd, 2009, 10:29 PM
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check the head for warpage with a straight edge and a feeler gauge.
If you cant do this take it to a machine shop and they can check it for you.

The FSM will say what the max warpage allowed is, normally about 0.004 inches

It also will tell you how much can be removed from the head to give a true surface.

2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold
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