so a rod was thrown and the piston it the head and valves. do i just need to replace these valves or is there more extensive damage?

 

Just replace the valves and have the springs and seats inspected.

 

what about the guides?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16matt &raquo;</TD></TR><TR><TD CLASS="quote">what about the guides?
</TD></TR></TABLE>

LoL...bronze sounds nice to me.

Yeah I'd inspect those and replace the valve seals on the entire head.

 

Well I would just take it to a machine shop for inspection.. given you hit the top of the head you might of damaged your valve train.. ..


I would check the all the valves, springs, camshaft lobes, guides, and valve seats.

 

This is terrible, but it is fix-up problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Root79 &raquo;</TD></TR><TR><TD CLASS="quote">This is terrible, but it is fix-up problem.</TD></TR></TABLE>

huh?

 

your best bet would be take it to a machine shop ... did the spark plug get bent by the piston, and did you scrape away the carbon on the valve ends? it doesnt appear that the damage is to the aluminum head at all (sohc motor?), its just the valves and you need to look at the valve stems to see if they are bent any.. I doubt there would be any damage to the retainers or the lifter because of the springs

there might actually be a little damage to the head where the valves seal, and if so then that could be a problem

 

http://huh?

?

 

shot peed the thing and clean it off a little, machine shop.

 

Dang....that head looks good compared to heads I have seen from blown up engines. The chamber doesn't look to have any damage. To me it just appears you can change valves, but the valves don't look bad...are they bent at all?

 

heh, well this is a z6 head i bought thinking it was in fine condition. i picked it up with it assembled to the blown block so i didnt check it right there. the seller told me it was good soo :/ anyways i dont have money for machine shops and whatnot so i guess ill take it apart and see how bad it is.

and i dont believe the spark plug is bent ill check tomorrow.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jaxle &raquo;</TD></TR><TR><TD CLASS="quote">heh, well this is a z6 head i bought thinking it was in fine condition. i picked it up with it assembled to the blown block so i didnt check it right there. the seller told me it was good soo :/ anyways i dont have money for machine shops and whatnot so i guess ill take it apart and see how bad it is.

and i dont believe the spark plug is bent ill check tomorrow.</TD></TR></TABLE>

Lots of interesting replies. As mentioned earlier, if you don't know what you are doing with it, drop it off at a machine shop. The valve face, necks, and stems will all need to be checked. If they are bent, then you are looking at new valves, new guides and new seals... Possibly new valve seats as well. There is also the chance that you got REAL lucky and nothing is wrong with it at all. Drop it off and fine out for sure.

 

Was the piston in pieces? Or was it still one solid piece?

The spark plug doesn't show signs of the normal type of damage from a broken motor. Looks more like the the rod broke, the picton hit the head and valve, but doesn't look like it hurt the head. Of course if the piston hit the valves, they could be slightly bent.

 

yea the rod was thrown, holes in the block and oil pan, but the piston is one solid peice still, atleast looking at it from the top. havent been able to take the oil pan off, its stuck or sumthing :/ you can see marks on the piston tho where it hit the valves tho.

so if i were to replace the valves myself, take it to a machine shop and have them check everything out, how much would that cost?

 

I'd say your best bet would be to sell the head and get a B18C.... ()
However though, its hard to see if vavles are bent in person, nevermind on the internet through a picture. A good way to check (posted her a cupple days ago) is to flip the head upside down (with the plug in) and fill the combustion chamber with water, make sure the cam is out to insure all the valves are closed fully. Obviously if water leaks out, then you're going to have to take it to a machine shop cause valves are bent....

-edit-
Is the cam in when you took that picture? if it isn't I'd say you have valves bent pretty bad (the exhaust valves on the # 3 are casting a pretty big shadow to be fully closed.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jaxle &raquo;</TD></TR><TR><TD CLASS="quote">the piston is one solid peice still, atleast looking at it from the top. </TD></TR></TABLE> sounds like the piston may have stayed in onepiece and may have in fact not damaged the head or valves at all.... but there are high chances that there is some damage to the valves in that cylinder head. better safe than sorry and I woudl replace them and the retainers almost without question.

 

Take the head to a machine shop and have it checked for straightness,cracks,other bent valves,guide damage and wear,spring pressures,and replace the seals.Chances are you'll need a resurface at least,since the head has to come apart you should have a valve job done also,as long as there is no guide damage it should be less than 200-300$ for a valve job,surface and new seals.

 

Im fixing a head for a guy right now
He bent all his Ex valves and the guides was cracked
New ex guides and Valve job and new Ferrea Ex valves $350
Thats what I charge 200 for labor 50 for guides and 100 for ex valves

 

Its hard to say, I took some pics of a damage head once before, but me, not knowing what to look for, I took it to a head specialist, aka MAX_CFM....its best you sent the head out rather than slaping some new valves, headgasket and the time to re-do it all over.

-Bert

 

the head is completely assembled with the camshaft and all. i just took off the camgear.

maybe i should just try to get teh 75$ i paid for it back :/

 

If you dont have the cash to fix the head then returning it would be best.But remember any junkyard or used head or block really shouldn't be used w/o having them checked, why risk using something that might cause damage to the rest of the motor or not even work at all.