not suitable for veiwers under 15 lbs of boost

[gst96spyderman]

All car info on profile is correct.

Just replaced HG and had Timing belt replaced by someone else. So I'm heading out to Panama City Beach for New year's @ 75-80 running 5-10lbs. Then the car dies on me. I fugure since the way it died, there was a loose connection somewhere or something along the lines of ignition... Well, I'm stuck on side of road and start looking under hood. I find that the TB is very loose. Flatbed car to mechanic who installed TB. Next day, find out that the head has a lot of damage. I pretty much expected that since the TB snapped. The head is at a machine shop right now and hopefully is not cracked. Anyways, I have NO idea why the TB snapped...

I now have the head off and come accross this. Tell me what is wrong here.

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Seems my NGK's melted in cyl #2 to the point where it got to the piston head and started the catastrophic chain reaction you see here. Also known as the DSM effect.

Here is where my questions come. I know I should research this more. I'm doing so right now and would like any and all input on this.

I'm pretty comfy with extremepsi.com since they ship pretty quickly and I've spent thousands with them. Found some replacement pistons, valves, valve seals and valve guides. All are topline products. Who has used or know anything about this company? This is my DD and want to be @ 300 ish whp until further notice. I'm not shooting for 10 seconds 1/4's, or looking to best my lap times... yet. I'm real pissed that I ####ed up my wiseco's and that this even happened.

 

[Tanro]

Looks like you dropped a valve. I would be pissed too. I would make the mechanic pay for it.

 

[mindset]

Well that's a waste. I'd just buy a stock rebuilt head from DSM Graveyard for $300.

 

[gst96spyderman]

spark plug melted... no grooves in cylinder wall. Block is fine. Or rebuild the head that was on there for $200. Need new valves, seals and guides. cams, rockers, lobes, cam shaft, springs and retainers and lifters are fine. Any opinions on Topline as a product?

I've got a labor claim going thru Gates Racing corp. We'll see how that goes. Mechanic is going to do rebuild for free. Only way he gets paid is if Gates comes thru.

 

[Tanro]

Cheapass taiwaneese garbage.

 

[gst96spyderman]

I guess thats better than cheapass chinese garbage.

 

[95tsiemad]

NPR are who made are factory pistons I think

 

[Tanro]

No not really.

 

[gst96spyderman]

npr made 420a pistons

 

[delta448]

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This is what happens when your timing jumps.

Red circles: where the exhaust valves kissed the pistons
Blue circle: a valve head embedded in the piston crown.

That valve head stuck in your #2 piston probably destroyed the spark plug, I'd doubt it was the other way around. I'd also venture to say that the TB getting blown off was related to the timing belt jumping, not sure exactly how that happened, but when combustion pressure goes through the wrong valve, bad stuff happens.

As for the rebuild, I'd stay away from topline if at all possible. I don't really know how they would hold up at 300ish fwhp, but they're a definite liability when you start wanting more power.

 

[gst96spyderman]

I looked at the TB and there were no noticable grooves in the threads. So it didn't look to have jumped on me. Thanks for the advice and help. No word from machine shop as of today because of MLK day. I'll hear something by tomorrow hopefully.

 

[williillii]

[ I'd also venture to say that the TB getting blown off was related to the timing belt jumping, not sure exactly how that happened, but when combustion pressure goes through the wrong valve, bad stuff happens.

. Thats what I thought at first. I think he means Timing Belt....

OP....good luck with the motor, thats crazy to see that valve stuck in the piston like that..

 

[gst96spyderman]

so two weeks later, I'm waiting on parts from DSMgraveyard.com. I do not recommend doing business with them. buying a rebuilt head from local shop, pistons from vendor listed, and still looking for a safc for less than $150 shipped. and yes, TB= timing belt. Sorry.

 

[delta448]

My bad... must have been half asleep when I replied before.

Hope all goes well with the rebuild.

 

[MY1GDSM]

No not really.

Actually Yes, YES Really

 

[97ebaygst]

would he be able to reuse those pistons? well all except the one that got the valve stuck in it. I had my valves kiss my pistons to and it did a little damage, really just gouged them a little. could I just sand and polish it down to make sure they don't there are no place for hot spots.?

 

[MY1GDSM]

But WHY?

 

[gst96spyderman]

negative on reusing pistons. U might be able too... but why would you? I'd love to reuse my wiseco's,

 

[gst96spyderman]

wiseco's oredered via extremepsi.com