Trouble in pushrods city with photo

[storm]

Recently built a 2027cc engine. Brake in predure went well. Nex day adjusted valves and repeat. Install into VW. Went on a trip in the country side driving at different speeds 40 to 55 mph. After about an hour heard a metallic sound coming from the rear. Number 3 cylinder was not working. Luckily I was not far from home. Took valve cover off and notice #3 exhaust pushrod disconnected from the rocker. Thease pushrods at heaven duty aluminum. Adjusted to .006. Have stock rockers. Wondering why this pushrod and the rest were not affected. Oil pressure at 55mph 48 lbs at 190 degrees. Like some info as what caused this. Thanks

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[modok]

pushrods are no good. Weaker than stock. You wasted your money buying those. Who was it? Empi?

[storm]

Glad that you chime in I like your article s. Yes, EMPI push rods.
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[modok]

AHA!
Begpack sold those darn pushrods for years, they just aren't made out of the right material.

Just the other day I thought..... since empi bought bugpack....I wonder what they are going to do with the remaining stock of those pushrods?
Hmmm yes I wonder

Nothing ever changes. Same shit different day.

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Those are aluminum, but they are not HD.
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[Dan Ruddock]

My pushrods won't do that along with others on the market. Looks like the steel end broke. Pushrods are parts that you CAN NOT getaway using cheap stuff regardless of what type of material they are. I have seen horribly soft steel pushrods.

Dan

[modok]

Yep. You can see from how it mushroomed so easily that it's not right.
Needs to be a high strength alloy of aluminum, and heat treated/aged.
A good hardened pushrod, if you break it, it nearly shatters.
True for steel OR aluminum.

[storm]

I purchased them from Fomoco. They said they are ok to use on single heavy spring s.
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[modok]

yep, just keep on shoveling, shovel it down the line.
It's a Dee/bugpack/empi/mofoco pushrod. And it's still weaker than stock no matter how far you shovel it.

[FreeBug]

Mine were in a SCAT packaging, iirc, and yes, even polished, they were turds. Mine failed exactly like yours, on n°3. I, too, was running "HD" singles.

I'm thinking, now, with this identical failure, maybe it has something to do with how the n°3 exhaust heats up more, the head expands most there, and valve clearance grows, and the pounding is what sets it off. Not worth thinking about, though, as there are so many good ally push rods out there now.

Live and learn..

[Ebel]

I’d check the cup in the rocker arm for damage too. Looks like the steel end snapped and left a piece in the pushrod. It might have chewed up the cup in the rocker.

[storm]

Thanks all for your comments. What other brands out there either steel or aluminum for single and double spring applications.
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[[email protected]]

You have 2 choices first, chromoly or aluminum. We developed HD Aluminum almost 20 years ago, it took us a while to find out what worked after many material failures. The big box stores never learned and continue to sell the stuff which doesn't work.

Chromoly are strong, but have a much lower expansion characteristic than aluminum, so typically valve lash increases as the engine gets hotter.

Aluminum expands at a more consistent rate than steel, so they tend to be quieter at operating temperatures.

We recommend


http://vwparts.aircooled.net/Manton-3-8-Chromoly-P...h-rods.htm as a great all-around chromoly PR, good for everything short of Chevy springs (Stock, HD Single, Beehive, Dual VW)

Chevy springs require a .058" wall, http://vwparts.aircooled.net/Manton-3-8-Chromoly-P...h-rods.htm


http://vwparts.aircooled.net/ACN-Heavy-Duty-Aluminum-Pushrods-Set-of-8-p/acnhdalpr.htm

for everything up to dual springs and 1.1 rockers (stock, HD SIngle, HD Dual w1.1 rockers).

If you go dual springs and 1.25+ rockers get the dual tapered http://vwparts.aircooled.net/ACN-Heavy-Duty-Aluminum-Pushrods-Dual-Tapered-p/acndthdalpr.htm
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It's just advice, do whatever you want with it!

Please do NOT send me Private Messages through the Samba PM System (I will not see them). Send me an e-mail to john at aircooled dot net

"Like" our Facebook page at
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[Dan Ruddock]

[nsracing]

For critical parts, buy the proper materials. The HD Aluminums from John/ACN really hold up well. I have used them on the larger motors over the years -provided by people for their motors. I have not seen failures in street use to date.

If nothing else, single spring application - just use the stock VW pushrods.

[slalombuggy]

I have a set of CBs HD aluminum pushrods coming out of my race engine. CB650 springs and no sign of wear. I cant use them any more so if you know your length shoot me a pm and I'll see if they are the same.

brad

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[maui]

I used cb ac.net and ruddeck and all super good but to me the ruddeck is the better ones but for you it’s overkill. Just get from John or cb perf.

[mark tucker]

do the mofoco roy deal. he has stepped up so do it. if you set the rocker end/side play @.002"-.004" they should be quiet at zero lash cold, thats zero, not loose

[storm]

Roy, thanks for the offer it sounds good. Mofoco has proven that it cares for the VW enthusiast. Good job.
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