tsquared38016

iTrader: (8)

I would say after all the input here it was probably due to the .041 gasket and failure to verify clearances.

Thanks for all your help guys! I appreciate the honest feedback. I will post some pics once the car lives again.

TT

JakeFusion

iTrader: (7)

No, if it gives stock PtV at 62cc, you're only losing .011" of clearance with the thinner gasket. I have a .040" gasket. That's not the problem.

Either the Tsunami has almost 0 PtV clearance on a stock motor, the heads don't have anywhere near that much clearance, or the cam was installed wrong (or ground wrong). Either way, that's why you measure.

maxpower_454

iTrader: (7)

+1 It's definitely not solely because of the gaskets. I thought the Tsunami cam was huge and flycutting is required. This proves it.

And to say those valves were 'hitting' the pistons is an understatement! I can't believe it ran as long as it did. I can't believe anyone would assemble an engine without checking PTV. It really doesn't take long at all.

That said, sorry to hear about this OP, that's a heck of a loss especially after doing all that work to install the parts and engine.

ckpitt55

iTrader: (4)

It's a tough loss OP, but it's a great learning opportunity. No engine combination is exactly identical....everything has tolerances. While parts may bolt on, they are certainly not "bolt-ons". There are implications with nearly everything when building a motor, regardless of what a vendor says. Unless they blueprinted it and have the documents to prove it, I would still check everything.

Measuring / blueprinting an engine is absolutely critical if you want it to last. Worst case scenario, you waste your time and find that everything is in specification, and you sleep peacefully at night. By going down this road, you learn about the intimate workings of your engine and you save yourself countless energy/time/$$$$ down the road in repairs.

If you have questions, don't be afraid to ask. This is what this forum is for. There are many many knowledgeable guys on here to help you out.

Here's to a speedy recovery

Burken01

iTrader: (88)

this is what I do with my build, I re-did my oil pan 3 times just to make sure it was done right because I wasn't satisfied with it when I let the first person do it for me..

CattleAc

iTrader: (7)

I know...but I didn't want to be rude and say something like..."Ray Charles could see those pistons were hittin' the valves".


And to the OP...I really am interested in finding out what caused your carnage. I'm about ready to install a used Z06 cam in my 5.3...I WILL be checking PTV clearance. (I wasn't going to before your post.)

maxpower_454

iTrader: (7)

Again, I can't believe anyone would not. It really takes like 15 min and costs about $25 to get a dial indicator and base at harbor freight or even less if you get calipers and use the clay method.

Paul Bell

iTrader: (9)

OK folks, lets chalk this up to inexperience and relying on everybody else (component sellers) saying "sure, it'll work/fit/not hit"

Expensive lesson for the OP and we can all take away from all this is the importance of test fitting and measuring parts and assemblies.

KCS

iTrader: (20)

Timing set dot to dot?

tsquared38016

iTrader: (8)

I did check the alignment when I installed the cam and also on tear down. Dot to Dot both times. I just had the cam inspected at Comp Cams. It was bent in the failure.

TT

tsquared38016

iTrader: (8)

Anyone have a good link to using both methods? One of the poor reasons I did not was the lack of having solid lifters lying around. I read you could not accurately use hydraulic lifters.

TT

gagliano7

What length were your pushrods? That sucks the valve were definately hitting the pistons. That really sucks good luck.

tsquared38016

iTrader: (8)

Comp Cams 7.55

tsquared38016

iTrader: (8)

No noticible noise at idle. Acclerating it made a sewing machine noise. I was told by CC tech and Tex Spd tech this was due to the aggresive lobes of the cam and the lift.

tsquared38016

iTrader: (8)

I took a picture of this. I ordered a Tsunami on 111 LSA. The cam has two makes on it. The one is for a Torquer V3 on 114. On know cams can be reground. Did not think the LSA could be chaned?

EricYJ-TA

iTrader: (10)

How did you get that pushrods length? Did you measure?

pauls99z28

iTrader: (32)

I was thinking the same..Seems pretty long but could be because of the 227 heads.

tsquared38016

iTrader: (8)

I watched the video on Comp Cams site multiple times. Used a checker. Verified pattern on top of valves using a black marker and rotating the crank. Removing the rocker and checking the wear pattern.

I thought the same thing about them being too long. The stock 7.40's were way loose. 7.45 still had slack when the bolt was tightened.

poltergeist 02

iTrader: (65)

Did you check with a solid lifter?

badazz81z28

iTrader: (6)

This is horrible...but like already said, you never trust anyone's word when assembling an engine. ALWAYS check your clearances. What fits on one, may not fit on another. It's purely obvious you had PTV issues. The LS6 short block did not come with pistons w/valve reliefs, the cam made those for you.

Really unfortunate to learn the hard way. But there are post in this section every single day asking "do I need to check PTV" and "What length push-rods do I need"...The info is on here.