Anyone tell me how bad this head/valve is?

chknhawk · 02-10-2014, 01:08 PM

Can anyone tell me from the looks of this what might need to happen. This is a water damaged Z (think it was a flood vehicle). Just checking for a friend to see if anyone has seen anything like this. I have opened engines before and my advice to him was drain all the fluids.. check for any rust or really off colored fluid. Do a flush of major parts and pieces and check compression. Maybe new plugs and minor stuff here and there... i don't know what else to tell him. Maybe a rebuild needs to be done? Thanks in advance!

1slow370 · 02-10-2014, 04:47 PM

clean the carbon check for cracks and warpage, looks like in needs spark plug hole repair, check to see if the valves are bent or rusted, if the valves are good its fine. Its very hard to get the intake valves serviced (nissan doesnt sell parts) so if the intakes are bad shes gonna cost a lot. clean it up first and check to see if the head is warped.

DEpointfive0 · 02-10-2014, 05:03 PM

If you need a driver's side head, give me a heads up

IDZRVIT · 02-10-2014, 05:53 PM

Looks like chunks missing on the edge of the combustion chamber at the 4 and 8 o'clock position and in the quench area. Severe detonation or corrosion?

Rusty · 02-10-2014, 06:56 PM

Quote:

Originally Posted by IDZRVIT

Looks like chunks missing on the edge of the combustion chamber at the 4 and 8 o'clock position and in the quench area. Severe detonation or corrosion?

Looks like the metal was pulleout.

OldBoy · 02-10-2014, 09:26 PM

Are they fixing the flooded car? Or just stealing the engine from it? More background info?

My guess is, it's detonation (specially since damage seems to be present on the exhaust side only). Water damage would have probably bent a rod and/or damaged the piston. Is there only one cylinder that shows signs of damage like this one?

I'm concerned about the edges of the combustion chamber and how small that gap is between the chamber and the water jacket. It's salvageable, but he would need to get it TIG welded and machined. Personally, I'd just buy a new head (or a long block depending on the rest of the engine).

1slow370 · 02-10-2014, 09:56 PM

are those chunks missing? i thought it was just hella carbon if those are missing chunks you have way bigger issues.

chknhawk · 02-10-2014, 10:14 PM

Im getting pueced together info too. God sent him my way so I could be of assistance. I just happened to bump into him. So.... I will relay all the info so far. Im thinkjng head replacement at this point might be ok... but if he is going to do that he might as well rebuild the engine so he can also chech bearings, cam, crank, and all that too?? Just my thoughts. I havent rebuilt and engine for quite some time and definately not worked on any z engine since the 280zx.

Sent from my SAMSUNG-SGH-I337 using Xparent Skyblue Tapatalk 2

Rusty · 02-10-2014, 10:58 PM

Water damage motor. If it was running when or tried to start it with water in the motor. Chances are some of the rods maybe bent.

phunk · 02-10-2014, 11:03 PM

i wouldnt run that head

Rusty · 02-10-2014, 11:09 PM

Quote:

Originally Posted by phunk

i wouldnt run that head

What was your first clue?

1slow370 · 02-11-2014, 02:28 AM

if it was water damaged but not hydrolocked at a bare minimum you are going to need to check or replace the rings, if there was water in the cylinder there was water in the rings and that will rust them, it will cause hell on the bores, so it my need a hone too, dropping it off at a machine shop at this point is the sensible decision

Jordo! · 02-11-2014, 04:41 AM

one valve looks trashed, but you'dd really need to clean off all the carbon deposits to get a better idea.

Compression test? leakdown?

IDZRVIT · 02-11-2014, 08:34 AM

I suspect there was damage to the heads/engine before the engine was water logged.

falconfixer · 02-11-2014, 08:58 AM

paperweight

02-10-2014, 04:47 PM	#2 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	clean the carbon check for cracks and warpage, looks like in needs spark plug hole repair, check to see if the valves are bent or rusted, if the valves are good its fine. Its very hard to get the intake valves serviced (nissan doesnt sell parts) so if the intakes are bad shes gonna cost a lot. clean it up first and check to see if the head is warped. DEpointfive0, luigi90210 and chknhawk like this. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

02-10-2014, 05:03 PM	#3 (permalink)
DEpointfive0 Premium Member Bitches Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17151	If you need a driver's side head, give me a heads up chknhawk likes this. __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

02-10-2014, 05:53 PM	#4 (permalink)
IDZRVIT A True Z Fanatic Join Date: May 2009 Location: Halifax Posts: 1,659 Drives: '13 CTS-V, '76 Vette Rep Power: 27	Looks like chunks missing on the edge of the combustion chamber at the 4 and 8 o'clock position and in the quench area. Severe detonation or corrosion? __________________ "America.... still builds rockets!" Vette: 355 cid, 400 rwhp '13 CTS-V Coupe: 6.2L LSA, 556HP

02-10-2014, 09:26 PM	#6 (permalink)
OldBoy Base Member Join Date: Feb 2012 Location: Ontario Posts: 61 Drives: '10 Nissan 370Z M6 Rep Power: 13	Are they fixing the flooded car? Or just stealing the engine from it? More background info? My guess is, it's detonation (specially since damage seems to be present on the exhaust side only). Water damage would have probably bent a rod and/or damaged the piston. Is there only one cylinder that shows signs of damage like this one? I'm concerned about the edges of the combustion chamber and how small that gap is between the chamber and the water jacket. It's salvageable, but he would need to get it TIG welded and machined. Personally, I'd just buy a new head (or a long block depending on the rest of the engine). chknhawk likes this.

02-10-2014, 09:56 PM	#7 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	are those chunks missing? i thought it was just hella carbon if those are missing chunks you have way bigger issues. chknhawk likes this. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

02-10-2014, 10:14 PM	#8 (permalink)
chknhawk Track Member Join Date: May 2012 Location: Kentucky Posts: 541 Drives: Like a batouttahell! Rep Power: 14	Im getting pueced together info too. God sent him my way so I could be of assistance. I just happened to bump into him. So.... I will relay all the info so far. Im thinkjng head replacement at this point might be ok... but if he is going to do that he might as well rebuild the engine so he can also chech bearings, cam, crank, and all that too?? Just my thoughts. I havent rebuilt and engine for quite some time and definately not worked on any z engine since the 280zx. Sent from my SAMSUNG-SGH-I337 using Xparent Skyblue Tapatalk 2 __________________ \| AEM \| INVIDIA \| GREDDY \| STANCE \| NISMO \| SETRAB \| STOPTECH \| HAWK \| TOYO \| HANKOOK \| BRIDE (wishlist) \|

02-10-2014, 10:58 PM	#9 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,170 Drives: 2011 Nismo GM 6M Rep Power: 2684437	Water damage motor. If it was running when or tried to start it with water in the motor. Chances are some of the rods maybe bent. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

02-10-2014, 11:03 PM	#10 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,668 Drives: 370 Rep Power: 974723	i wouldnt run that head Chuck33079 likes this. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

02-11-2014, 02:28 AM	#12 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	if it was water damaged but not hydrolocked at a bare minimum you are going to need to check or replace the rings, if there was water in the cylinder there was water in the rings and that will rust them, it will cause hell on the bores, so it my need a hone too, dropping it off at a machine shop at this point is the sensible decision __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

02-11-2014, 04:41 AM	#13 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	one valve looks trashed, but you'dd really need to clean off all the carbon deposits to get a better idea. Compression test? leakdown? __________________ Enjoy it. Destroy it.

02-11-2014, 08:34 AM	#14 (permalink)
IDZRVIT A True Z Fanatic Join Date: May 2009 Location: Halifax Posts: 1,659 Drives: '13 CTS-V, '76 Vette Rep Power: 27	I suspect there was damage to the heads/engine before the engine was water logged. Chuck33079 likes this. __________________ "America.... still builds rockets!" Vette: 355 cid, 400 rwhp '13 CTS-V Coupe: 6.2L LSA, 556HP

02-11-2014, 08:58 AM	#15 (permalink)
falconfixer Track Member Join Date: Feb 2012 Location: 10aC Posts: 978 Drives: Taco Rep Power: 76	paperweight

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
FS: Valve Covers	SxExCx	Parts for sale (Private Classifieds)	5	11-24-2010 12:50 PM
Valve Adjustment	370zFORme!!	Engine & Drivetrain	34	04-22-2010 03:21 AM
Valve coming to Mac?	theDreamer	The Lounge (Off Topic)	12	04-02-2010 09:12 PM
Head-to-head pics: 05 350Z vs 370Z	xDIEGOx	Nissan 370Z Photos / Spyshots / Video / Media Gallery	12	01-02-2009 05:58 AM