Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk > Engine Tech

Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series.


Reply
 
Thread Tools Display Modes
Old 11-05-2009, 07:23 AM   #31
s14unimog
Nissanaholic!
 
s14unimog's Avatar
 
Join Date: Dec 2003
Location: In a place, near a river, over a lake
Age: 34
Posts: 2,415
Trader Rating: (22)
s14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond repute
Feedback Score: 22 reviews
Send a message via AIM to s14unimog
Quote:
Originally Posted by ericb382 View Post
The FSM gives procedures for a stock HG. We are talking about aftermarket HG's. I hope you wouldn't use the FSM's torque specs when torquing down ARP head studs.... Same concept.

Like I mentioned earlier, I called Apexi (the manufacturer of my HG) and asked them what they recomend for THEIR HG. They said not to use anything. I didn't and it worked perfect. Like I also mentioned earlier, there are some instances where I would deviate from their recomendations to match a specific application, but in a perfect world (head, block and front cover machined) you don't need it.
I am very aware of the differences between this installation and that of a standard OEM head gasket. With that said, I would think a MLS headgasket could use the additional "support" to seal that area. I spoke with Cosworth USA about my application and they recommended the use of liquid gasket on the front cover. I am not the kind of individual to do motor work without extensive research.

I appreciate your input and can end this debate with a few more words.

For all who read this write up:
If you feel you don't need liquid gasket and are confident that it will not leak, then don't use it. If you feel that you might need it, use it.
__________________
Fu*king ginger bread man stole my wallet...

SHIFTlock_slide to side

d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson
s14unimog is offline   Reply With Quote
Sponsored Links
Old 11-05-2009, 11:54 AM   #32
ericb382
Zilvia Member
 
Join Date: Oct 2005
Location: Mesa, Az
Posts: 293
Trader Rating: (4)
ericb382 is an unknown quantity at this point
Feedback Score: 4 reviews
So cosworth probably doesn't put the "additive" on their HG's that Apexi does. I was told by apexi that they put an additive on their HG so you don't need RTV. This is a perfect example of why you should contact the mfg our your particular parts for their recomendations, because every brand does things a little different.
ericb382 is offline   Reply With Quote
Old 11-06-2009, 01:15 PM   #33
s14unimog
Nissanaholic!
 
s14unimog's Avatar
 
Join Date: Dec 2003
Location: In a place, near a river, over a lake
Age: 34
Posts: 2,415
Trader Rating: (22)
s14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond repute
Feedback Score: 22 reviews
Send a message via AIM to s14unimog
^ good point! That's an interesting bit of information about Apexi; I never knew that.
__________________
Fu*king ginger bread man stole my wallet...

SHIFTlock_slide to side

d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson
s14unimog is offline   Reply With Quote
Old 11-13-2009, 07:00 AM   #34
s14unimog
Nissanaholic!
 
s14unimog's Avatar
 
Join Date: Dec 2003
Location: In a place, near a river, over a lake
Age: 34
Posts: 2,415
Trader Rating: (22)
s14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond repute
Feedback Score: 22 reviews
Send a message via AIM to s14unimog
just a bit of closure. I've put about 30 miles on the car since I've done the head gasket and all seems to be well. I will do a leak down soon and post those results.
__________________
Fu*king ginger bread man stole my wallet...

SHIFTlock_slide to side

d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson
s14unimog is offline   Reply With Quote
Old 11-13-2009, 12:39 PM   #35
ericb382
Zilvia Member
 
Join Date: Oct 2005
Location: Mesa, Az
Posts: 293
Trader Rating: (4)
ericb382 is an unknown quantity at this point
Feedback Score: 4 reviews
Quote:
Originally Posted by s14unimog View Post
just a bit of closure. I've put about 30 miles on the car since I've done the head gasket and all seems to be well. I will do a leak down soon and post those results.
And a bit more closure for the topic.... I leakdown tested mine after my HG install with 0% leakage (shitty harbor freight tester tended to stick on 0 then shoot all the way to 100 when there was a problem.) I drove it untill my fuel pump went out during HPDE and melted my CP piston. Yes, the HG held better than the piston. Don't take this as a bash on CP at all, I love them, it was just lean as shit, no piston will hold that.... but the HG did.
ericb382 is offline   Reply With Quote
Old 11-16-2009, 10:02 AM   #36
s14unimog
Nissanaholic!
 
s14unimog's Avatar
 
Join Date: Dec 2003
Location: In a place, near a river, over a lake
Age: 34
Posts: 2,415
Trader Rating: (22)
s14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond reputes14unimog has a reputation beyond repute
Feedback Score: 22 reviews
Send a message via AIM to s14unimog
That is no bueno, I had a "less than intelligent" roommate that had the turbonetics single kit on his 350Z with some random reflash (bought the kit used and not complete). Long story short, he had no wideband and has gone through 3 motors (from lack of understanding the problem) and in one of those, destroyed a set of CP pistons before any head gasket issues. Without confident and correct monitoring of your A/F's you are almost guaranteed to burn your pistons down.

"The correct air/fuel ratio balance of an engine is most critical for piston longevity, durability and proper engine operation. The combination of too much fuel or too little air will have the same result – thermal growth or piston crown erosion."

Engine Builder Magazine - Heavy Duty Technology: Piston Failure Analysis
By Dennis Nail


I've been draggin ass about doing a leak down test, but I've run the motor fairly hard with no issues.
__________________
Fu*king ginger bread man stole my wallet...

SHIFTlock_slide to side

d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson
s14unimog is offline   Reply With Quote
Old 01-04-2010, 04:25 PM   #37
91240sxhatch
Zilvia Member
 
91240sxhatch's Avatar
 
Join Date: Sep 2003
Location: santa cruz CA
Posts: 250
Trader Rating: (2)
91240sxhatch is an unknown quantity at this point
Feedback Score: 2 reviews
Send a message via AIM to 91240sxhatch
i have a few quick questions. i am about to do put my motor back together. i am reusing my apexi head gasket and arp studs. i am probably going to use the copper spray on the gasket and liquid gasket on the cover area as mentioned.

note: there was nothing wrong with the hg or head before. i am replacing the bottom end/shortblock.

my question is when you put the liquid gasket on do you let it dry at all before dropping the head on? it seems to me that the weight of the head would push it all out. and at what point of the liquid setting/drying do you start the torque sequence?

and one more thing. arp recommends their moly lube to install the studs. but its just an assembly lube so can i use my redline assembly lube in lieu of the arp brand?

i was able to seal a cometic hg on my last sr20 but it was brand new. any advice helps. thanks in advance.
91240sxhatch is offline   Reply With Quote
Old 02-12-2016, 10:38 PM   #38
Turb
Leaky Injector
 
Turb's Avatar
 
Join Date: Jun 2015
Location: Arizona
Age: 24
Posts: 88
Trader Rating: (0)
Turb is an unknown quantity at this point
Feedback Score: 0 reviews
Should I our rtv on my valve cover gasket?
Turb is offline   Reply With Quote
Old 02-12-2016, 11:39 PM   #39
cotbu
Post Whore!
 
cotbu's Avatar
 
Join Date: Sep 2005
Location: SWFL
Age: 47
Posts: 3,318
Trader Rating: (3)
cotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nicecotbu is just really nice
Feedback Score: 3 reviews
Rtv should only be needed on the half moons. You can use it as a bandaid, but why? Buy a new gasket!

Sent from my SM-N910T3 using Tapatalk
__________________

LoverTechnologies "Half Broken Things!"
cotbu is offline   Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 10:47 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™