Sup,
So im planning a freshly brand new fully rebuiilt, sleeved, bored, block. Althogh the head i currently have is used. It is a JG Built head. After talking with the shop about the set up, they said they are worried about the valves on the head not being good. They said i should replace the whole valve train or at least the valves that way the valves dont drop at start up. They said even if you take it to a machine shop to et it pressure tested, etc..... there is always a possibility that a valve will drop. Should i replace the whole valve train or just the valves? Should anything be replaced at all? Im worried as soon as i start the car the first time on my set up that it will damage the newly built block, which in other words is about 4,000 dollars down the drain.

What do yyou guys think?

 

quick bump before class resumes....

 

When using a used built head, what can i watch out for before i put it in the car?

 

I thought you would be able to help me.... But whatever.

 

well, how old is the head? you could take some valves out to check them out, look at the retainers for wear, take it to a shop(preferebly not the same your using) and have them vaccum test it.

I dont know your relationship/reputation of the shop, they could be trying to get more money out of you.... or not..

 

wouldnt valve "drop" refer to binding your retainers and slapping yoru piston...? There trying to make a buk on yur ***, tell them to go fluk themselves

 

yeah, thanks alot for advice. So there are tests out there to guarantee that i dont drop a valve or soemthing like that right? he said the only way to guarantee it is if i replace the valve train.

 

We are the shop that recomended it. We are not selling him any valves or anything since someone else will be doing the work. The thing is that we are buidling the block which we stand by 100% and tony1 is goin to tune it. You know all the cars we have done are some of the best and again, we stand by our work.

Here is the problem, the customer wants a set up that will never have any problems, ever! Again, we stand by OUR work 100%. If we build the block and something happends to the valve train or the head, or damages the block then we can not do anything about it since that was out of our hands.

Many people know both me and tony's reputation and we are not trying to take money from anyone. Its just some people try to take the cheap way out and in the end it ends up being more expensive.

Again, we stand by OUR work 100%.

art

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Arturbo &raquo;</TD></TR><TR><TD CLASS="quote">We are the shop that recomended it. We are not selling him any valves or anything since someone else will be doing the work. The thing is that we are buidling the block which we stand by 100% and tony1 is goin to tune it. You know all the cars we have done are some of the best and again, we stand by our work.

Here is the problem, the customer wants a set up that will never have any problems, ever! Again, we stand by OUR work 100%. If we build the block and something happends to the valve train or the head, or damages the block then we can not do anything about it since that was out of our hands.

Many people know both me and tony's reputation and we are not trying to take money from anyone. Its just some people try to take the cheap way out and in the end it ends up being more expensive.

Again, we stand by OUR work 100%.

art</TD></TR></TABLE>

Thanks for Info Art. I was trying to get more opinions on the fact if i should get new valves or not. Yes you guys do stand by your work 100%. I always take your shop's reccomendations in to fact, although i still do not understand why there isn't a test to determine if the valves will drop before spending $1000+ on a new valve train.....

What other risks come into mind when running a used head?

Thanks

 

Sam, I think you are misunderstanding how it all works. Valves don't just "drop". Springs can become weak, retainers can crack, valves can start to pull through retainers, etc. It's not a simple will a valve "drop" or not. You could completely disassemble that head, have everything inspected, have the valve springs tested on a spring tester, replace the keepers, etc. I believe art recommending it stemmed from your wanting 100% assurance that nothing will happen to the motor. You having an old used head with valvetrain of an unknown condition could potentially become a problem. You are the type of customer that wants to be 100% sure about everything happening, and that's fine, but that's what Art is trying to do for you.

And remember, even when it's all said and done, anything can happen. I have a car here that had new Rev retainers in it and the valves started pulling through the retainers. There is no guarantee that nothing will ever happen, that's part of the game. What we can guarantee is the work that is done. That's all anyone except the manufacturer can guarantee.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">Sam, I think you are misunderstanding how it all works. Valves don't just "drop". Springs can become weak, retainers can crack, valves can start to pull through retainers, etc. It's not a simple will a valve "drop" or not. You could completely disassemble that head, have everything inspected, have the valve springs tested on a spring tester, replace the keepers, etc. I believe art recommending it stemmed from your wanting 100% assurance that nothing will happen to the motor. You having an old used head with valvetrain of an unknown condition could potentially become a problem. You are the type of customer that wants to be 100% sure about everything happening, and that's fine, but that's what Art is trying to do for you.

And remember, even when it's all said and done, anything can happen. I have a car here that had new Rev retainers in it and the valves started pulling through the retainers. There is no guarantee that nothing will ever happen, that's part of the game. What we can guarantee is the work that is done. That's all anyone except the manufacturer can guarantee.</TD></TR></TABLE>


I completely understand that. I am the type of guy taking all the proper precautions to make sure nothing happens. I obviously take Art's advice into consideration greatly, and i will be doing all it takes to keep the chances low on something going bad. That is the reason for the research, i wll be taking the head to the machine shop and getting it tested, taken apart etc. What else should i do to prevent something from happening?

 

All you can do is inspect everything the best you can, use good parts, work with good people, and hope for the best. Unfortunately, there is NEVER a guarantee nothing will happen.