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Old 01-04-2020, 04:37 AM   #1
James M
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Default Is this head destroyed

Question first then story time for my own entertainment: Is this head destroyed beyond usefulness?

20200102-224708


I've seen some some pictures of ported heads with some of the material edge of the combustion chamber removed, specifically the ones from John V.
Volvo-Evo-2-807

Seems that the damage to this head could be removed along with this material but I have no experience with porting yet much less with the combustion chamber landscaping this would take. Just looking for advice if I should pursue some radial combustion chamber work or use this as a practice head for normal porting.

How this came to be if anyone is interested:
B230f+t with a td06-20g. As mentioned when I asked about hot sides before buying the turbo the specific one I was asking about has very poor wastgate placement, only allowing it to open about 45° so boost creep is pretty much a given. I had my manual boost controller at 17psi but I knew it liked to creep to ~23. One too many hard pulls in 4th (ignoring the popping an open downpipe makes when detonating) and I was greeted with a loss of power, lots of smoke and oil all over my engine bay. As visible in the pictures ringland failure on cylinder 2. Not gonna say I wasn't asking for it, just wanna see if the head is useful for more then practice.

20200102-224700
20200102-224941
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Old 01-04-2020, 05:19 AM   #2
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Old 01-04-2020, 05:46 AM   #3
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Practice head it is then. Maybe ill mess with the chamber but likely just for the hell of it
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Old 01-04-2020, 07:31 AM   #4
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Doesn't look too bad. Just grind the sharp edges and send it. Though check the valves and seats, there might be aluminium pieces and they won't seal.
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Old 01-04-2020, 07:45 AM   #5
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Doesn't look too bad. Just grind the sharp edges and send it. Though check the valves and seats, there might be aluminium pieces and they won't seal.

agreed. grind down any protrusions on the head and maybe replace that piston (or grind down any protrusions). my biggest concern would be the valves and seats after that. The damage definitely isn't pretty or ideal, but I know we've all seen worse.
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Old 01-04-2020, 02:39 PM   #6
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I wouldn't be the slightest bit concerned about re-using that head. Have it skimmed to clean it up. Have a valve job done at the same time and you'll have a nice reconditioned head.
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Old 01-04-2020, 05:16 PM   #7
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I wouldn't be the slightest bit concerned about re-using that head. Have it skimmed to clean it up. Have a valve job done at the same time and you'll have a nice reconditioned head.
definitely, take it to a machine shop, have the head milled and valve job done. I would recommend doing any porting work before hand, and have the machine shop clean, do a valve job, and mill the head. no little sparkly bits inside the engine
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Old 01-04-2020, 06:30 PM   #8
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Inspect the valves and seats, clean off any aluminum, knock off the sharp edges and send it.

If you have plenty of disposable income take it to a head shop.

But first does any spray cleaner leak past the valves?

Check your turbo for any damage from piston bits....
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Old 01-04-2020, 08:13 PM   #9
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When stuff like that gets too deep in the head surface. It is repaired by welding and then the head is surfaced. I had a shop do that to save a 531 head.
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Old 01-04-2020, 10:37 PM   #10
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Yup, take it to a machine shop, easily reusable. Jump in on the valve GB, throw some nice valves and a little porting time into it as well, wake it up. Sorry, shameless plug for the valve GB going now...

That sucks man, glad you got a little time on it first. Definitely need more fuel for that setup though, 42's on that setup is pretty small.
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Old 01-04-2020, 10:44 PM   #11
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[QUOTE=James M;6029563]Question first then story time for my own entertainment: Is this head destroyed beyond usefulness?

20200102-224708


I've seen some some pictures of ported heads with some of the material edge of the combustion chamber removed, specifically the ones from John V.
Volvo-Evo-2-807

Thats more than just material removed. That chamber was filled in and reshaped and maybe longer valves installed. Looks like a sbc chamber on the good heads that are out there. The volvo chambers are so deep, its like a bathtub, lol
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Old 01-05-2020, 12:27 AM   #12
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When stuff like that gets too deep in the head surface. It is repaired by welding and then the head is surfaced. I had a shop do that to save a 531 head.

I'd say that would have to depend on how deep the gouges in the head are, and how much you can actually take off the head. If you have the room to take off the head, trim it up, close up the chamber a bit and bump the compression a little at the same time.
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Old 01-05-2020, 02:56 AM   #13
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agreed. grind down any protrusions on the head and maybe replace that piston (or grind down any protrusions). my biggest concern would be the valves and seats after that. The damage definitely isn't pretty or ideal, but I know we've all seen worse.
I don't think I can grind down this damage

20200104-224609

I checked the turbine wheel and its not damaged, nothing made it out of the chamber luckily. Ill tear the head apart later and check the seats and valve faces, but likly just use it as practice. Luckily I had a 95 b230ft Ide been waiting to put in so I dont have to make any of these parts work.

Time for more boost:
20200104-223646
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Old 01-05-2020, 02:59 AM   #14
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Originally Posted by gsellstr View Post
Yup, take it to a machine shop, easily reusable. Jump in on the valve GB, throw some nice valves and a little porting time into it as well, wake it up. Sorry, shameless plug for the valve GB going now...

That sucks man, glad you got a little time on it first. Definitely need more fuel for that setup though, 42's on that setup is pretty small.
I'll have to checkout the GB for those, I've seen it but never been in ready to buy them, sure am now.

80lb injectors should be here soon? Ordered on the 28th from Toronto, UPS ground without tracking so Ive been checking the mailbox every time a truck passes.
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Old 01-05-2020, 03:08 AM   #15
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Dude thats Knarly! Got melted. Cool picture though!
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Old 01-05-2020, 03:18 AM   #16
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That one tried to warn you.

Opportunity knocks..... Forged pistons and H-Beam rods are the clever way to solve weak stock bits.

Better engine management with more charge cooling will do wonders for keeping it happy while making lots of power in the future.
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Old 01-05-2020, 03:36 AM   #17
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That one tried to warn you.

Opportunity knocks..... Forged pistons and H-Beam rods are the clever way to solve weak stock bits.

Better engine management with more charge cooling will do wonders for keeping it happy while making lots of power in the future.
Your signature suits this recommendation. Definitely thinking about building a motor next time, but I'm hoping a late model ft will do better then a skinny rod with 300k on the clock. Charged air temps are pretty low with my new intercooler, but not running tiny injectors and waiting more then 3 miles after reconnecting the battery (ECU relearn) may help this one survive
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Old 01-05-2020, 03:37 AM   #18
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Dude thats Knarly! Got melted. Cool picture though!
The melted piston metal in the cylinder looks like JB weld, you can see some of it ran down the bottom of the piston too. Gonna make a cool paperweight
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Old 01-05-2020, 03:39 AM   #19
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The melted piston metal in the cylinder looks like JB weld, you can see some of it ran down the bottom of the piston too. Gonna make a cool paperweight
Clean that head and run it again.




Not cool
Restore it to stock
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Old 01-05-2020, 03:40 AM   #20
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Your signature suits this recommendation. Definitely thinking about building a motor next time, but I'm hoping a late model ft will do better then a skinny rod with 300k on the clock. Charged air temps are pretty low with my new intercooler, but not running tiny injectors and waiting more then 3 miles after reconnecting the battery (ECU relearn) may help this one survive
It’s the loose but behind the steering wheel
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Old 01-05-2020, 03:58 AM   #21
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It’s the loose but behind the steering wheel
Couldn't be my fault, it's hard to lift when with the sweet sound of an open downpipe. Detonation just sounds like antilag and I wasn't going to let that Lexus pass me.

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Clean that head and run it again.
Not cool
Restore it to stock
Then will you give me more then 250 for it?
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Old 01-05-2020, 10:41 AM   #22
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You can guarantee SOMETHING got out the exhaust.
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Old 01-05-2020, 01:19 PM   #23
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It’s the loose but behind the steering wheel
At least he blew it up for a reason and not from an oil leak.
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Old 01-05-2020, 02:33 PM   #24
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How much heat needs to be applied to a piston to make it like that?
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Old 01-05-2020, 03:48 PM   #25
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Wow, that's some nasty melting man! Tuning was definitely an issue there, big MAF, small injectors, and it was probably maxed out on the fuel side when that happened, given the turbo and boost levels you're running. Makes my valve failure seem tame. lol
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