This sucks

[zigzkidz]

Ok well i got the complete top end gasket kit sent my heads out about 2 weeks ago. Well today i got a call out of 16 valves 12 where bent! But anyways the heads are being cleaned, surfaced, valve set, vavle seats, and used valves so i guess its not to bad for the price

 

[hesutton]

Wooohh!

Why? Did the motor jump time and the valves kissed the pistions? Are the other pistons OK? There should be a reason for them to bend, they just don't do that because they are bored.....

Heath

 

[91f2504x4]

I don't see how there are 10 other valves bent, I would have only expected the 2 valves in that cylinder to be bent at most. Has the truck been running bad for a while? Did all the other pistons look Okay, with no valve stamps on them?

Do you know the shop you sent them to really well, are they reputable?

Something sounds wrong, either there was more wrong with your engine than you thought or someone is taking you for a ride.

I hate to sound negative but I hope you are not taking it in the tater hole. I have heard of transmission places replacing the Manual lever position switch, changing the fluid and charging the person for a full rebuild before so, there are bad guys out there.

 

[zigzkidz]

no the engine ran perfectly fine, i have no idea how they got bent and i sure didnt know anything was wrong. But ya there bent, the guy stuck them on the lathe and you could just c that they were bent, its crazy.

 

[zigzkidz]

Ok i talked to the guy again today, hes gonna polish the ports, machine 10 thousand of the surface, and regride the valve seats, and all the other stuff. For the same price as before

 

[hesutton]

Ok i talked to the guy again today, hes gonna polish the ports, machine 10 thousand of the surface, and regride the valve seats, and all the other stuff. For the same price as before

Be careful about machining the head surface. There is a minimum thinkness needed and it is easy to over do it. If I remember Gary's posted spec's:
Minimum head thinkness is 4.795 from the valve cover rail to the head/block mating surface. The warpage can be 0.006 overall or 0.003 in any 6 inch length of head surface.

Gary I need you to help my out here.

Anyway, why in the world would you have bent all those valves? That is the most important answer to find....otherwise it can happen again with your newly rebuild heads!

Heath

 

[icanfixall]

Heath.. You spoke correctly... Do not let some "guy" convince you to mill the heads. The minimum thinkness has to be 4.795 or up to 4.805. But if you must mill them.. Please save all the pieces and for sure post pictures of the aftermath. That goes for the machinst too. Has this guy even miced the heads for proper thickness yet??? They may have been cut before you owned it and thats why so many valves are bent. I'm just not buying what you have been told by someone that seems to know what they are talking about. Please believe this... I have been down this road trusting a machine shop "self proclaimed expert". Thats the idiots that caused my melt down because they installed the wrong freeze plugs and didn'y feel they needed the correct tool to do it... That was a $2300.00 lesson I paid for.... Now when I drive by they get this from me every time...;p

 

[Papabear]

Heath.. You spoke correctly... Do not let some "guy" convince you to mill the heads. The minimum thinkness has to be 4.795 or up to 4.805. But if you must mill them.. Please save all the pieces and for sure post pictures of the aftermath. That goes for the machinst too. Has this guy even miced the heads for proper thickness yet??? They may have been cut before you owned it and thats why so many valves are bent. I'm just not buying what you have been told by someone that seems to know what they are talking about. Please believe this... I have been down this road trusting a machine shop "self proclaimed expert". Thats the idiots that caused my melt down because they installed the wrong freeze plugs and didn'y feel they needed the correct tool to do it... That was a $2300.00 lesson I paid for.... Now when I drive by they get this from me every time...;p

they should've made good on the 2300.00 not you

 

[f-two-fiddy]

Also, If any Milling is done. The valve stems need to be ground to the proper length, also.

 

[zigzkidz]

ok i got to talk to him again and i had him check the valves again and only 2 were bent 10 of them the ends where messed up, i thought he meant all 12 were bent. I guess it looks like im calling him tomorrow about.

 

[typ4]

DO NOT let them take 10 off the heads, if they are dead flat dont surface them at all.
Mine took 3 thou to clean up and the ONLY reason this was done was the engine sat in the rain a while before I got it.
Ends of valve messed up = bad rocker arms. plan on replacing them with the 7.3 units.
Are they doing guides and what kind?
Also if it has lots of miles do valve springs cheap insurance, if he says he has never seen an IDI break a spring then he hasnt done many of them.
Oh and check the pushrods and lifters on that cyl the lifters could be damaged from the impact, you can disassemble and clean them and inspect easily.

 

[zigzkidz]

#*#$%&#! he already did it before i called him, i told him if he F###s it up i want new heads, and he said ok, i think he got my point. And he said he would make all the proper adjustments to compensate for the 10 thousands. I already got 7.3 rockers.

 

[icanfixall]

Someone needs to use a 4 to 5 inch mic and get a read on these heads. They might be ok for use. But... If you are getting replacement heads from them make sure you "see the measurements and the prove what they get. I know this is tuff to verify but its the only way to be sure of what you are getting. Just because they say its fine doesn't really mean anything.. How many times were you told... This isn't going to hurt...... I know most members can't read a micrometer or use one so they are at a disatvantage. So finding someone that you can trust is difficult at best. Now for more head information... Don't yet the shop knurl the guides. That is crap. They need guides installed and thats just the correct way of fixing worn guides. The crecups can be above or below the head surface 0.0025 and nothing mor or less. Thats 2 1.2 thousands. The intake valve must be set at a depth of 0.042 to 0.054 deep in the head. and the exhaust valve must be set 0.051 to 0.063 deep in the head. If the shop can't meet this 12 thousands tollerance then you don't want them doing any machine work for you. The 12 thousands is a country mile in the maching world. I have had tollerances that were less than 0.0005 and I could make them but it also depends on how good your mill or lathe is running. A worn out mill ways will not be able to hold a tollerance that close. I worked on a WW2 cannon lathe that was constantly upgraded but it still wasn't very accurate on the machining we did. Every time we started it up we had to zero out everything because the bushings were worn and the lube oil would make the shaft ride at differant locations. Doing a small cut it was fine but over a 2 or 3 ft long cut it was off lots. We finally installed roller bearings and it was spot of from there on out to infenity. Get dome measurements on the heads before you "buy anything". The shop should be pleased to show off what they can do and not be pissed that you are questioning them... Thats another sign of a good shop.

 

[typ4]

Look for the thickest head gaskets available and have them sink the valves to the correct depth. I have done automotive machine work for years and the "surface it so its pretty " factor doesnt play in my book, I tell people that there is no need to remove material if it is in spec.

 

[RLDSL]

The shop should be pleased to show off what they can do and not be pissed that you are questioning them... Thats another sign of a good shop.

That right there is the key! The weasels will get all defensive and try to convince you things will work that you know darn well won't .the owner of a good shop will go all ear to ear grins on you and act like they're showing off they're new kids/grandkids