Would you put THIS cylinder head on YOUR engine? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 07-08-2012, 11:48 AM   #1
Junior Member
Thread Starter
iTrader: (10)
 
Join Date: Jun 2011
Location: Detroit Burbs
Posts: 300
Total Cats: 3
Default Would you put THIS cylinder head on YOUR engine?

Alright,

I bought this cylinder head last week, and it arrived a couple days ago:

https://www.miataturbo.net/miata-par...-%24100-66768/

It is cracked, and I was planning on having a professional fabricator from work weld it back up. But, when I took it apart to clean it, I noticed that the cylinder #2 cam bearing was destroyed. All the other cam caps show signs of embedded particle damage, but the #2 exhaust is toast - with both the cylinder head and camshaft being damaged.





So, quoting the seller from a PM he sent me:

"I jsut talked with my mechanic. He said the head should still run fine after the cracked is fixed. In fact, the head had been running in my car for a year. I had no problem with it. at this point, since the head could still run fine after cracked is fixed, i would not accept return."

So, ignoring the crack in the cylinder head - would you put THIS cylinder head on YOUR engine?
Frank_and_Beans is offline   Reply With Quote
Old 07-08-2012, 11:53 AM   #2
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Not with that damage.
hustler is offline   Reply With Quote
Old 07-08-2012, 11:59 AM   #3
Elite Member
iTrader: (12)
 
Join Date: Apr 2008
Location: Springfield IL
Posts: 2,750
Total Cats: 24
Default

Can they be line honed?
chpmnsws6 is offline   Reply With Quote
Old 07-08-2012, 12:25 PM   #4
Senior Member
iTrader: (1)
 
BogusSVO's Avatar
 
Join Date: Mar 2012
Location: Pensacola Fla.
Posts: 590
Total Cats: 191
Default

Sorry, I do not have a dog in this fight but I deal with heads daily.

I have heads in my scrap pile with less cam tower damage.

There is not enough material left in the cam tower picture for a align hone or bore.

The cost to have it align honed would cost more than the head is worth

I would concider this a parts head at this point, pull the valves and springs and send the head casting to the scrap yard to be recycled.

If the seller reads this, I would have to say the mechanic did not see this damage, or if he did he is a fool. (also the short block this head came off should be pulled apart and have the oil galleys cleaned, and the oil pump inspected for metal trash and debris )

This is just my .02 cents
BogusSVO is offline   Reply With Quote
Old 07-08-2012, 12:45 PM   #5
Trackspeed Engineering
iTrader: (9)
 
Join Date: Jan 2008
Location: Bay Area, California
Posts: 937
Total Cats: 10
Default

Quote:
Originally Posted by chpmnsws6 View Post
Can they be line honed?
Not with that much damage.

Quote:
Originally Posted by BogusSVO View Post
Sorry, I do not have a dog in this fight but I deal with heads daily.

I have heads in my scrap pile with less cam tower damage.

There is not enough material left in the cam tower picture for a align hone or bore.

The cost to have it align honed would cost more than the head is worth

I would concider this a parts head at this point, pull the valves and springs and send the head casting to the scrap yard to be recycled.

If the seller reads this, I would have to say the mechanic did not see this damage, or if he did he is a fool. (also the short block this head came off should be pulled apart and have the oil galleys cleaned, and the oil pump inspected for metal trash and debris )

This is just my .02 cents
+1
crashnscar is offline   Reply With Quote
Old 07-08-2012, 12:50 PM   #6
Senior Member
iTrader: (1)
 
Join Date: Jan 2011
Location: Chattanooga, Tn
Posts: 1,038
Total Cats: 157
Default

Yea. I bought one from a local guy that looked about like that. I trashed it and bought another. Before I bought the next one I had the guy take the cam caps off and send me pics. You could weld the journal up and then have it line honed / bored but you would need to find a new cam. Buy the time you were done with that you would have WAY more in it that it was worth.
TNTUBA is offline   Reply With Quote
Old 07-08-2012, 02:06 PM   #7
Junior Member
Thread Starter
iTrader: (10)
 
Join Date: Jun 2011
Location: Detroit Burbs
Posts: 300
Total Cats: 3
Default

The seller has now closed the original for sale thread. I assume because he was not really feeling support from the community.
Frank_and_Beans is offline   Reply With Quote
Old 07-08-2012, 02:38 PM   #8
Junior Member
iTrader: (1)
 
Join Date: Aug 2011
Posts: 93
Total Cats: 0
Default

Agreed^
silvermazda is offline   Reply With Quote
Old 07-08-2012, 03:04 PM   #9
Junior Member
Thread Starter
iTrader: (10)
 
Join Date: Jun 2011
Location: Detroit Burbs
Posts: 300
Total Cats: 3
Default

Here are some pics from under the camshaft:





As you can see, the oil supply port for the cam bearing is covered up with mangled aluminum, so I assume this was going to be catastrophic soon.

Also note the scoring on the #3 exhaust cam bearing.
Attached Thumbnails
Would you put THIS cylinder head on YOUR engine?-img_8633.jpg   Would you put THIS cylinder head on YOUR engine?-img_8631.jpg  
Frank_and_Beans is offline   Reply With Quote
Old 07-08-2012, 03:26 PM   #10
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,806
Total Cats: 183
Default

Quote:
Originally Posted by Frank_and_Beans View Post
The seller has now closed the original for sale thread. I assume because he was not really feeling support from the community.
Or because he clearly listed the fact that he took a vise grip, and clamped it on the cam to remove or install his cam gear.
thirdgen is offline   Reply With Quote
Old 07-08-2012, 03:40 PM   #11
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

If you paid with Paypal, hit him with a dispute. Box it up and ship it back with certified mail.
hustler is offline   Reply With Quote
Old 07-08-2012, 03:44 PM   #12
Junior Member
 
Join Date: Jan 2005
Location: Fort Worth, Texas
Posts: 242
Total Cats: -1
Default

wow. so i wounder if it was making noise on the top end? i have seen far less make alot of racket.
fwMiata is offline   Reply With Quote
Old 07-09-2012, 01:29 AM   #13
Trackspeed Engineering
iTrader: (9)
 
Join Date: Jan 2008
Location: Bay Area, California
Posts: 937
Total Cats: 10
Default

Quote:
Originally Posted by thirdgen View Post
Or because he clearly listed the fact that he took a vise grip, and clamped it on the cam to remove or install his cam gear.
And that caused this damage, how?
crashnscar is offline   Reply With Quote
Old 07-09-2012, 01:40 AM   #14
Junior Member
 
Join Date: Jan 2005
Location: Fort Worth, Texas
Posts: 242
Total Cats: -1
Default

Quote:
Originally Posted by crashnscar View Post
And that caused this damage, how?
not the cam damage, but generally just dumb.
fwMiata is offline   Reply With Quote
Old 07-09-2012, 06:53 PM   #15
Senior Member
iTrader: (9)
 
Join Date: Oct 2006
Location: Lexington SC
Posts: 1,003
Total Cats: 14
Default

Outch!
Rallas is offline   Reply With Quote
Old 07-09-2012, 07:13 PM   #16
Senior Member
 
Join Date: Aug 2008
Location: Baton Rouge
Posts: 700
Total Cats: 17
Default

No. Paypal dispute time.
golftdibrad is offline   Reply With Quote
Old 07-14-2012, 02:40 PM   #17
Junior Member
iTrader: (1)
 
Join Date: Jan 2012
Location: Ireland
Posts: 465
Total Cats: 16
Default

wow thats pretty awful... how does that even happen
rhysmate is offline   Reply With Quote
Old 07-14-2012, 06:09 PM   #18
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,846
Total Cats: 1,787
Default

Quote:
Originally Posted by fwMiata View Post
not the cam damage, but generally just dumb.
it's kinda what you gotta do to install one. but I'd use a wrench sized for that spot on the cam and not let it torque up against the head wall.
Braineack is offline   Reply With Quote
Old 07-17-2012, 08:53 PM   #19
Junior Member
 
Join Date: Jan 2005
Location: Fort Worth, Texas
Posts: 242
Total Cats: -1
Default

Quote:
Originally Posted by Braineack View Post
it's kinda what you gotta do to install one. but I'd use a wrench sized for that spot on the cam and not let it torque up against the head wall.
me too, works just fine... I/we even had one that we ground/filed to fit really good on there just for that.
fwMiata is offline   Reply With Quote
Old 07-17-2012, 11:26 PM   #20
Newb
 
Join Date: Jan 2011
Location: Phoenix
Posts: 15
Total Cats: 0
Default

If he never said anything about the cam and cap in the ad, can you dispute it? The mechanic probably didn't take the caps off.
natesturbo is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
elesjuan's mediocre 95 Miata adventure (google fiber edition) elesjuan Build Threads 8 02-16-2016 09:36 PM
wiring wideband ground to battery terminal btabor ECUs and Tuning 10 09-28-2015 06:33 PM
Partial Turbo kit for a 1.6 and dual headlight kit. Andifer Miata parts for sale/trade 8 09-23-2015 06:43 PM
In what world... curly MEGAsquirt 11 09-22-2015 12:54 PM
Mystery Engine Trouble. Halp, mt.net! vehicular General Miata Chat 12 09-14-2015 04:17 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:30 PM.