2fastz06

Hi guys been watching and reading the site for over a year..picked up an 09 with 30k.

I've been doing research on the valve issue. didn't think much of it till I seen all the blown engines.

There was a video on here I seen and figured i'd check the heads. 3 are really bad from the top veiw with springs off.

Now I got to pull the heads. Was gonna send off to WCCH till this was posted. Not sure what to do as this guy on ls1 tech said he flat out won't touch the guides.

So my ? is what is the fix? The car I have had guide work done. not sure what valves were used but does have bronze valve guides.

The guy that posted this thread on ls1 tech, I'll link if thats ok not sure on rules about that. said to try the moldstar 90 guide..who sells these? I seen AHP has them, Will they sell out right or have to send them in? any help would be great..This sucks. here is the link I'm referring to.

http://ls1tech.com/forums/generation...ls7-heads.html

08mojo

I didn't see cam specs mentioned in that thread. An aggressive, really high lift cam is going to wear out guides faster. It also didn't mention how the car was used.

I have wcch stage 2 heads. If the guides wear out, I'll try the moldstar 90 guides next. Give AHP a call, they are great to talk to directly.

2fastz06

Thanks for the reply. I will be calling AHP in a few hrs thanks. Got to pull the heads now I quess. This sucks

MTPZ06

Kohle at AHP will take care of you...they are the only ones using MS90 guides to my knowledge, but I'm sure others will follow at some point. I had Kohle install MS90 guides in my heads last year...I sleep well now.

American Heritage

We are the only ones using our Proprietary Moldstar90 valve guides.

We do sell our Moldstar90 guides out right but the final honing of them is different than any guide material most have ever seen or worked with.

Moldstar90 work hardens over time so the longer you use it the stronger it gets. The more you beat on it the better it is. Moldstar90 is top tier stuff!!! With that said you have to take the "work hardening" into consideration when machining/ final honing them. In all honesty it is probably easier to send in a set of heads to us or use one of our core heads.

If your looking for no down time you could always put down a deposit on one of our core sets. We would then send it out to you and once you complete the swap send back in your old heads for your core deposit back.

Give us a call we are always glad to talk with customer and potential customers about our heads and our process:
310-326-2399

or if email is better for you:
HP@americanheritageperformance.com


http://www.americanheritageperformance.com/

Frans96ss

We have our entire HCI packages in stock. NO waiting WEEKS for heads like a lot of the head porters. We use Advanced inductions. Our package has been 9.81@142.5

fattiremike

I went with AHP stage 4 with Moldstar 90 guides. No regrets, awesome product.

outhouse

great company


Call Kohle and you will get a down to earth walkthough to meet your goals.

Undy

The guy you were talking to was booted off this site three times or so for being confrontational with people and going against board rules. He hasn't had much luck with LS7 heads, hence his refusal to work on them. Myself, I don't place much stock in his opinions. Nothing personal against him though. I definitely wouldn't let him work on my stuff.

I don't think you could go wrong with AHP. I'd also go with their Moldstar90 guides too.

Unreal

I would do AI heads if I had to. Next choice would be WCCH package.

Mamo heads also show promise and if you can swing the coin for his full package that is a decent option.

2fastz06

Thanks guys!..Guess should have said the heads already have been ported.
I just want to fix the heads.
In my eyes the heads had already been taking care of. This car is already is to much car payment for me, Now this. Thanks guys for your info

ian08

Those are my heads and have been taken off every year andvgiudes come threw for 3 years everytime I have had excessive worn guides in under 10k miles and I know a handful of people like me with heads from every vender with worn guides still even chads heads the porter in pic sent his to wcch the last time and guess what 10k later is pulling them off cause they are out of spec these new ms90 guides sound very promising and I wish I could post pics of the great work from chad but I allready tired that and the mods deleted it

ian08

My cam is aggressive 660 lift and I race the crap out of mine lives at 7k lots of 1/2 mile runs street 30-160 car it's what u build it for so pulling the heads in a day is easy for me to do every winter car previous had heads done by IPS with there cnc work car as been 165 1/2 and 139 1/4 with chads new head work and my single plane build I expect to see 170 1/2 and 142+ in 1/4 should make somewhere in 630-650 whp on 93 still stock CI

2fastz06

So Those are your heads in the video that's been done 3 times? F that.

2fastz06

The guy I got the car from said the heads had been worked by advanced induction.
I have the paper work from him.
One reason that thread got my got my attention. Because they take that swirl thing out in the bowl as well.
I'm gonna go with AHP on this as soon as I get the heads off.

ian08

AHP AND NGP seem to be the ones with the best track recorded or not wearing out guides and they offer a great wareenry program I think blows my mind over a decade later this is still a problem I have seen it on the aftermarket castings also

Unreal

If AI already worked your heads, I wouldn't touch a thing. AI is top notch.

ian08

[QUOTE=2fastz06;1593768575]So Those are your heads in the video that's been done 3 times? F that.[/QUOTE


some to a lot of fixed heads still wear guides it's just the design of the heads I feel no body wants to admit that and are imbaressed about to admit it thing is with SS exhaust valves they don't break generally might wanna see my YouTube page before U say **** that I mess up so many cars inthis 10y old NA car it isn't even funny anymore not that I am not happy about pullInf heads every year it's easy to do every car has its weak spot

apexman

I took my car to AHP for head work. Great shop to work with and won't hesitate to go back when it's time for a cam.

Derek

JerriVette

You can NOT check the valves with the heads on the car. You do not have a problem. The internet has you crazy.

Good luck and if you want new heads then just say it but you don't need them for a design or production flaw based off of checking the valves with the heads on the car.

Of course no one here listens and many will chastise me...