Sunday, August 31st, 2014



- It is currently Sun Aug 31, 2014 2:15 am

All times are UTC - 4 hours


Jump to:  


Post new topic Reply to topic  [ 26 posts ] 
Author Message
irvthecurve
PostPosted: Mon Mar 19, 2012 12:19 pm 
Offline
Riding on 13's

Joined: Thu Jul 19, 2007 10:34 am
Posts: 4
hey i have a 2004 xtrail , engine type qr20 4wd ,the problem is this the head gasket fail about a month ago ,i sen t it in and pressure tested the head for cracks and so on ,had to shave the head cause it was warped a bit ....no cracks !!!! used the original head gasket bought it from the motorist ,low and behold the head gasket went bad again three weeks after ,has anyone had a similar problem ,any experiences like this with the xtrails ?????
your input would be greatly appreciated !!!!


Share on FacebookShare on Twitter
Top
 Profile  
 
ruffnek
PostPosted: Mon Mar 19, 2012 3:15 pm 
Offline
Trinituner Peong
User avatar

Joined: Fri Jan 14, 2005 11:24 am
Posts: 445
Location: Bumper 2 Bumper
Buy some aftermarket head studs and torque it high.....problem will be fixed


Top
 Profile  
 
irvthecurve
PostPosted: Tue Mar 20, 2012 9:37 am 
Offline
Riding on 13's

Joined: Thu Jul 19, 2007 10:34 am
Posts: 4
ok cool ill mention that to my mechanic ,anyone else with any suggestions ,trying not to go down the buying a new engine ,they kinda hard to get and very expensive !!!!


Top
 Profile  
 
Strugglerzinc
PostPosted: Tue Mar 20, 2012 1:20 pm 
Offline
18 pounds of Boost
User avatar

Joined: Fri Jul 01, 2005 11:11 am
Posts: 2374
Location: Second star to the right.
ruffnek wrote:
Buy some aftermarket head studs and torque it high.....problem will be fixed


and the reasoning behind this is what again?


Top
 Profile  
 
krack korn
PostPosted: Tue Mar 20, 2012 3:23 pm 
Offline
3NE2NR is my LIFE
User avatar

Joined: Tue Sep 20, 2005 9:56 am
Posts: 748
resurface the block, with cast iron blocks you usually dont have a issue but aluminum blocks will warp just like the head and metal gaskets need to have precisely mating surfaces, you can get away with a small amount of warp using composite gaskets but not metal headgaskets


Top
 Profile  
 
irvthecurve
PostPosted: Thu Mar 22, 2012 7:46 am 
Offline
Riding on 13's

Joined: Thu Jul 19, 2007 10:34 am
Posts: 4
thanks


Top
 Profile  
 
krack korn
PostPosted: Thu Mar 22, 2012 4:31 pm 
Offline
3NE2NR is my LIFE
User avatar

Joined: Tue Sep 20, 2005 9:56 am
Posts: 748
also, I have not heard this being a problem with the nissans but it has happened with the toyota camrys etc, on over heating the threads in the block become weak and fail, this will cause the head bolts and studs to loose tension hence the head gasket will not seal. This problem will be obvious to the mech though by bits of aluminum in the head bolt threads and/or difficulty in removing tightening the head bolts. The fix for that is to helcoil the block threads or have studs remade with a larger thread diameter.


Top
 Profile  
 
Red Dawg
PostPosted: Wed Apr 04, 2012 4:09 pm 
Offline
Chronic TriniTuner
User avatar

Joined: Tue Apr 22, 2003 5:26 pm
Posts: 586
Location: On the inside at Zorce
Had this problem before.
The QR20 uses torque to yeild bolts and have specific torque regimen.
Also it may be necessary to deck the engine block in addition to shaving the head.
All of the head bolts have to be checked for stretch and replaced if necessary.
I will post the nissan specs.


Top
 Profile  
 
jefjams
PostPosted: Mon Apr 09, 2012 12:56 am 
Offline
Riding on 13's

Joined: Mon Feb 27, 2012 3:04 pm
Posts: 9
as a xtrail owner, i eventually did an engine conversion after 3 gasket and 1 complete engine replacement, I think when gasket goes cylinder sleeve in block is also damaged #justsaying Good Luck


Top
 Profile  
 
Red Dawg
PostPosted: Mon Apr 16, 2012 9:46 am 
Offline
Chronic TriniTuner
User avatar

Joined: Tue Apr 22, 2003 5:26 pm
Posts: 586
Location: On the inside at Zorce
jefjams wrote:
I think when gasket goes cylinder sleeve in block is also damaged #justsaying Good Luck


Exactly, that is why you may have to machine the deck surface of the engine block in addition to the cylinder head.

Here are the torque specs and the instructions on how to inspect the cylinder head bolts for the Xtrail.

Image


Top
 Profile  
 
Ted_v2
PostPosted: Sat Apr 28, 2012 9:36 am 
Offline
TriniTuner 24-7

Joined: Tue Mar 30, 2010 8:58 pm
Posts: 7266
jefjams wrote:
as a xtrail owner, i eventually did an engine conversion after 3 gasket and 1 complete engine replacement, I think when gasket goes cylinder sleeve in block is also damaged #justsaying Good Luck


converted to? sr?


Top
 Profile  
 
irvthecurve
PostPosted: Thu May 24, 2012 12:48 pm 
Offline
Riding on 13's

Joined: Thu Jul 19, 2007 10:34 am
Posts: 4
ok guys so i got the head and block shaved , its about two weeks now and every things seems to be working fine , water level is still the same temp is not moving from half way mark ,so fingures crossed it solved the problem .


Top
 Profile  
 
pioneer
PostPosted: Tue Jul 03, 2012 12:22 am 
Offline
TriniTuner 24-7
User avatar

Joined: Fri Apr 18, 2003 12:27 am
Posts: 16148
Location: OM-TT.COM
I'm having these same issues again, happened 2 years ago. The head n block was shaved, new gasket. However it seems they're warped again. Temp gauge never pass half. There's coolant in the oil. Rough idle and power loss. Shaving this head n block again making no sense to me...

What's the avg price of a head n block?

I also read on other forums the cat converter disintegrates (was part of a recall) and messes up the cylinders. Also read the bit about the head bolts stretching.

What do I do?


Top
 Profile  
 
Ted_v2
PostPosted: Tue Jul 03, 2012 5:51 am 
Offline
TriniTuner 24-7

Joined: Tue Mar 30, 2010 8:58 pm
Posts: 7266
Best bet is look into gettinga fu head and block if possible , along with some arp bolts or some type of new bolts, the firm might have. This needs to change along with a head and block.

an idea is to pm anil sooknanan on the forum, as he knows where you should start to look for the head and block or a possible engine conversion to a sr20vet if you like, seeing these vehicles came with them on certain model


Top
 Profile  
 
FullStop
PostPosted: Tue Jul 03, 2012 10:10 am 
Offline
3NE 2NR Power Seller
User avatar

Joined: Sat Aug 11, 2007 8:47 pm
Posts: 3089
for the guys who've been having the head/block warping issues with the QR20, may I ask what oil you're using? You'd think its unrelated, but please state, these engines are NOT supposed to overheat/warp to the extent that this is occurring. Please post your oil brand and body, also the coolant you use. Thanks


Top
 Profile  
 
pioneer
PostPosted: Tue Jul 03, 2012 9:33 pm 
Offline
TriniTuner 24-7
User avatar

Joined: Fri Apr 18, 2003 12:27 am
Posts: 16148
Location: OM-TT.COM
ended up getting a head n block in le bamboo for $6k

brb swappin


Top
 Profile  
 
pioneer
PostPosted: Tue Jul 03, 2012 11:15 pm 
Offline
TriniTuner 24-7
User avatar

Joined: Fri Apr 18, 2003 12:27 am
Posts: 16148
Location: OM-TT.COM
ghostbusters wrote:
for the guys who've been having the head/block warping issues with the QR20, may I ask what oil you're using? You'd think its unrelated, but please state, these engines are NOT supposed to overheat/warp to the extent that this is occurring. Please post your oil brand and body, also the coolant you use. Thanks


Castrol Edge 5W50 syntec

Prestone coolant...was using "genuine nissan coolant" first time it happened...


Top
 Profile  
 
pioneer
PostPosted: Wed Jul 04, 2012 12:19 am 
Offline
TriniTuner 24-7
User avatar

Joined: Fri Apr 18, 2003 12:27 am
Posts: 16148
Location: OM-TT.COM
As someone mentioned earlier, and as I read on other forums...I believe the culprit is crappy head bolts...because in both cases my head gasket was fine...no signs of "blowing" per se...but the head n block warped a bit...temp gauge never moved either...


Top
 Profile  
 
FullStop
PostPosted: Wed Jul 04, 2012 12:35 am 
Offline
3NE 2NR Power Seller
User avatar

Joined: Sat Aug 11, 2007 8:47 pm
Posts: 3089
I've noticed a very high rate of failure on the nissan lean burn engines. Thing is lean burning engines would run hotter, but I would think they'd be engineered to handle the high temperatures. This is very interesting. makes sense that it could be head studs, many factory head studs are the stretch type. I wonder if the extra heat coupled with the stretched head studs could be the cause of failure...Any of you guys ever tried upgrading to some ARP studs?


Top
 Profile  
 
pioneer
PostPosted: Wed Jul 04, 2012 12:48 am 
Offline
TriniTuner 24-7
User avatar

Joined: Fri Apr 18, 2003 12:27 am
Posts: 16148
Location: OM-TT.COM
Also I'm reading the cat converter also disintegrates (on older models) and can wreck your cylinder walls...

http://www.nissanforums.com/x-trail/798 ... lem-2.html

They suggested getting rid of the stock manifold/headers and go with an aftermarket cat. converter setup...question is...where do we get it locally?

A local mech also told me get rid of the cat converter totally...


Top
 Profile  
 
FullStop
PostPosted: Wed Jul 04, 2012 8:41 am 
Offline
3NE 2NR Power Seller
User avatar

Joined: Sat Aug 11, 2007 8:47 pm
Posts: 3089
the local mechanics are on to the fact that cat converters contain precious metals, the scrap iron buyers pay a premium for cat converters now, hence why mechanics are widely recommending the removal(might be different in this case though).

So I read the thread, you might really be better off removing the cat. Would be very important to use a good coolant as well, silicate free, to maintain maximum cooling...Zeerex for asian vehicles is really good.(check MG man). Looks like materials problems from reading the thread though.


Top
 Profile  
 
Red Dawg
PostPosted: Wed Jul 04, 2012 8:24 pm 
Offline
Chronic TriniTuner
User avatar

Joined: Tue Apr 22, 2003 5:26 pm
Posts: 586
Location: On the inside at Zorce
My experience with these engines leads me to believe that one of the causes of this problem is the reuse of the stretch head bolts.
When I trained at Renault in France they advocated replacing stretch bolts every time they were removed. We all know that that is not going to happen here in T&T. but the factory service manual shows how to measure the head bolts to determine if they need replacing.
The problem with the bolts is that after many heat cycles and reuse, they do not have the same tensile strength and clamping force as when they were new, add that the fact that not every mechanic uses the specific tightening routine for these heads (which I posted earlier) and the result is recurring head gasket failures.


Top
 Profile  
 
pioneer
PostPosted: Wed Jul 04, 2012 8:46 pm 
Offline
TriniTuner 24-7
User avatar

Joined: Fri Apr 18, 2003 12:27 am
Posts: 16148
Location: OM-TT.COM
So if say one had a fairly newish engine...wait for the headgasket to blow then change the headbolts?


Top
 Profile  
 
web_phantom
PostPosted: Mon Jul 09, 2012 8:40 am 
Offline
Chronic TriniTuner
User avatar

Joined: Mon May 19, 2003 11:10 pm
Posts: 588
The rule of thumb is that when you TTY head are supposed to be changed when removed because of the stretched threads. I am not sure if this engine carries the three pc metal shim type head gasket, if it does than the this type of gasket does not help seal off any imperfections on the head of any change in clearance due to a slight raise of temp. as the older paper type/composite type gaskets used to .


Top
 Profile  
 
pioneer
PostPosted: Wed Jul 11, 2012 12:55 am 
Offline
TriniTuner 24-7
User avatar

Joined: Fri Apr 18, 2003 12:27 am
Posts: 16148
Location: OM-TT.COM
Yeah it's metal shim, so what do we do?


Top
 Profile  
 
FullStop
PostPosted: Wed Jul 11, 2012 9:41 am 
Offline
3NE 2NR Power Seller
User avatar

Joined: Sat Aug 11, 2007 8:47 pm
Posts: 3089
the fel pro head gaskest(blue) have a coating that when heated up flows and seals minor imperfections in the head. I dont know if its available for your application though.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 26 posts ] 

All times are UTC - 4 hours


Who is online

Registered users: 25 to LIFE, aisaii, akil.mno, auto connection011, Autobot, Bing [Bot], blooddrunk1990, cruelzz, Curtisj60, Custom Options, Dapper, Exclay TT, Google [Bot], Google Adsense [Bot], Google Feedfetcher, gt4tified, kk80king, metalhead, mragoobir, natio, novastar1, rambo88, rookie7270, safik20, scareboy007, snipes swagger, Spitfir3, thelem, TriP, Yahoo [Bot], ztune


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group
3NE-2NR