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  VW Parts Catalog > Engine Parts >

ACN Heavy Duty Aluminum Pushrods, Dual Tapered, Set of 8 (both ends out)
ACN Heavy Duty Aluminum Pushrods, Dual Tapered, Set of 8
 
ACN Heavy Duty Aluminum Pushrods, Dual Tapered, Set of 8 (shipped with both ends out) are the strongest Aluminum Push Rods available for Aircooled Engines. These keep your valve lash consistent at all temperatures, unlike Steel and Chromoly who's gap increases with engine temperatures. Valve lash with chromoly push rods can be "Loose Zero" when cold, but be over .020" when hot (CLACK CLACK CLACK). These prevent that. Our Dual Tapered Version is so strong it will take anything you can throw at it! Typically the Straight Ones are fine for VW size springs, but if you run Chevy Springs or BOOST, get the Dual Tapered!

Are you sick of the clackity-clack clack clack valvetrain noise that steel push rods give you when the engine gets hot? SO WERE WE! That's why we designed these aluminum push rods to assure that the valve clearance is constant regardless of temperatures (PR expansion is the same as stock)! These 3/8" 2024 T-3 heat treated .095" wall thickness pushrods are good to 400-500 lbs of spring pressure for you guys with HUGE valves and valve springs! Get the benefit of proper expansion and quiet running in a push rod that can handle any valves, RPMs, and springs that you throw at it!

We successfully use these even on Chevy Valve Spring equipped engines, with ratio rockers, up to 9500 RPM! These are over 3X stronger then the other Aluminum "HD" pushrods available (which we stopped selling due to failures). Run these at .006" cold, same as stock, which will give you .002" when hot. These pushrods are designed by and are exclusive to Aircooled.Net.

IMPORTANT: Measurements given are TIP TO TIP measurements (assembled length), but the sets are shipped with BOTH ENDS OUT. These pushrods have a counter bore, so IF YOU CUT OFF TOO MUCH LENGTH FROM EITHER END, THE TIPS WILL NOT INSTALL. For this reason, you will need to get the shortest push rod that is longer than you need.

Also available in custom lengths! ORDER CUSTOM LENGTH HERE.

Price: $219.95


: ACNDTHDALPR

Choose Pushrod Length


Also available in custom lengths! ORDER CUSTOM LENGTH HERE.

Special Order Item Agreement

I AGREE TO THE SPECIAL ORDER / NON-RETURNABLE TERMS FOR THIS ITEM
Special Order Items are NON-CANCELLABLE once initiated. All sales of Special Order Items are final (non-refundable and non-returnable), and may be subject to pre-payment by non-refundable payment method.

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Overview
 
ACN Heavy Duty Aluminum Pushrods, Dual Tapered, Set of 8 (shipped with both ends out) are the strongest Aluminum Push Rods available for Aircooled Engines. These keep your valve lash consistent at all temperatures, unlike Steel and Chromoly who's gap increases with engine temperatures. Valve lash with chromoly push rods can be "Loose Zero" when cold, but be over .020" when hot (CLACK CLACK CLACK). These prevent that. Our Dual Tapered Version is so strong it will take anything you can throw at it! Typically the Straight Ones are fine for VW size springs, but if you run Chevy Springs or BOOST, get the Dual Tapered!
Item Features

SPRING PRESSURE: We have no limit yet on the dual tapered design with spring pressure. One main reason for running these is to reduce valvetrain mass so you can drop spring pressure, so don't go nuts on the spring pressure!

WEIGHT: For reference, in a 11.600" length, the weight of a stock pushrod is 39.1g, ACN HD Aluminum are 47.8g, ACN Dual Tapered HD Aluminum is 55.8g, Manton Chromoly Straight are 90.2g, and Manton DT Chromoly are 100.5g.

WARNING: These steel push rod tips are case hardened .012-.015" deep to a 60-62 Rockwell on the C scale (that means they are HARD). YOU must check them for smoothness, and MAY have to smooth them (polish) with some fine emory or sandpaper prior to installation for best results.

Valve lash is critical on aluminum push rods. It is possible to have a push rod failure even though you haven't exceeded our RPM or spring pressure limits, and this is always due to excessive valve lash. If your valve lash gets over .010", the tips of the push rods WILL get pounded into the push rod. This is not a problem if your valve clearance is the way it's supposed to be, but a swivel foot failure, or loose valve adjusting screw, can cause excessive lash which can ruin these push rods quickly.

The end of these push rods have an OD of the pushrod body of 3/8" (.375") for those concerned with pushrod tube interference. For reference, the stock push rod is 10.935 inches long on the 1300, 1500, and 1600 engines. Before you make the jump to Aluminum push rods, be aware that valve tapping can be caused by valve lash, AND ROCKER ARM SIDE PLAY. Make sure your sideplay is tightend to .005", a loose rocker (side to side) will sound just like a loose valve adjustment.
Average Customer Review: Average Customer Review: 5 of 5 5 of 5 Total Reviews: 1 Add your review too!

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  1 of 1 people found the following review helpful:
 
5 of 5 Only product at the time that fit my requirements July 30, 2015
Reviewer: Andrig Miller from Louisville, CO United States  
I recently came back to the custom VW scene, because I decided to build a custom VW with my daughter.  In designing the engine, I did a lot of research into thermal expansion.  The stock engine was designed with proper thermal expansion in mind and a new high performance engine should too.  Lots of reliability issues can arise if you don't take it into account.  These have worked great on our 2110cc engine with ACN L5 heads.  We are running an Engle FK-41 cam with 1.4 ratio rockers (just over .510 lift at the valve).  These are really nice.  I set the valve lash at .004 and the engine valve train is nice and quiet, especially when it reaches operating temperature.  Instead of getting more noise at operating temperature and less valve lift, along with more stress on the valve train components, you get less noise and less stress, along with better performance and reliability.  You cannot beat these.

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