Shop Line - Engine Builder Magazine

Shop Line

I’ve had complaints of a strange rattling noise on some 4.0L Rover engines, any ideas?

The AERA Technical Committee offers the following information regarding rocker arm noise on 1997-2001 4.0L Rover engines. Customer complaints of a rattling/tapping noise from the engine have been found to originate from the rocker shaft area. The noise may result from a hardened push-rod cup not being secured in the rocker arm.

To resolve this type of condition update the valve train with the revised rocker assembly. Replace all rocker arms manufactured prior to date code ’00’ with new rocker arms having a date code ’00’ or above (Such as ’01’ See Figure 1). Revised components are available using p/n 602154 for the LH rocker arm and p/n 602153 for the RH rocker arm.

Chart 1:” Range Rovers with these VIN codes may need the rocker arms replaced”,

Figure 1 & 3

Caution: only rocker arms with date codes ’00’ or later may be used to repair valve train noise; discard all other rocker arms. Use of early production rocker arms may result in a recurrence of the problem.

Why is there a hole drilled through the crankshaft on LS1 and LS6 engines?

The AERA Technical Committee offers the following information regarding the rear crankshaft oil plug and pilot bushing for 1997-2005 GM 5.7L VIN G & S engines. These high performance engines are also known by their LS1 and LS6 RPO codes.
These engines use a unique crankshaft design that when installed it allows for free air movement between the lower crankcase portions. To facilitate that function the crankshaft is drilled from the rear centerline toward the front, passing through the rear four main journals. The hole created in doing so must be sealed with a cup style plug to prevent oil from leaking externally.

Depending on the engine application, a pilot bushing (p/n 14061685) is required for vehicles with standard transmissions. This bushing is 1.0940″ (27.790 mm) on the bronze outside diameter and houses a steel needle bearing assembly inside. It is also important on all applications that the previously mentioned cup plug is installed to a depth of 1.228?-1.240? (31.2-31.6 mm) as shown in Figure 3.

For information on receiving all of AERA’s regular monthly technical bulletins and other association services and benefits, call toll free 888-326-2372 or send an e-mail to [email protected] AERA’s Web site is www.aera.org.

You May Also Like

Passion Runs Deep

Having had the distinct opportunity to view this industry from my chair as editor of Engine Builder has certainly opened my eyes to a lot of great things this industry has going for it. However, my favorite thing about it – hands down – is the passion. Whether it’s passion for covering the industry (as

Having had the distinct opportunity to view this industry from my chair as editor of Engine Builder has certainly opened my eyes to a lot of great things this industry has going for it. However, my favorite thing about it – hands down – is the passion.

Whether it’s passion for covering the industry (as we do), or passion for manufacturing components (as so many of our partners do), or passion for creating horsepower and engines (as all of our readers do) – there’s certainly no lack of passion here. That all said, where I’ve seen the most passion for what our industry is all about is on the track. That’s where the proverbial rubber meets the road, and where the manufacturing, the engines, the cars, and the people all come together to earn a longed-for result.

PRI 2021: What a Show

First things first – Happy New Year to you all. I sincerely hope you got to be with friends and family during the holidays and that you all had a safe and fun end to 2021. We’ve now officially welcomed 2022, and as the holidays have quickly come and gone, as they always do, I

New Year’s Resolution

It’s crazy to think that 2021 is coming to a close. The days and weeks in a year always feel long, but the months and the year itself, absolutely fly by. It’s strange how that always is the case. There’s no stopping Father Time as they say! All we can do is forge ahead and

Not Your Father’s Engine Builder

I’ve actually lost track of how long it’s been since people started claiming print was dead. It’s been a while! Now, I understand the ‘print is dead’ claim might be different for newspapers than it is for magazines, but I can tell you this – the content landscape has certainly been shifting. Related Articles –

Experience Always Wins

Formula 1 racing often tells smaller stories within each individual race; the final stretches of the Russian Grand Prix proved in my eyes that experience always wins.

Other Posts

Protect Yourself as a Small Business

This month’s column is for all those folks in automotive performance with a small business, as well as those looking to get into this segment of the industry. Automotive performance is this gray area that comes with risks and rewards as well as customers who don’t know what they don’t know. If you’re not careful,

April Has Been Good to Me

Two years ago this month, I was promoted to editor of this fine publication and brand we call Engine Builder. After having been in the managing editor role for the five years prior, I got my chance to run the ship, as they say, when Doug Kaufman accepted an editorial director role within Babcox Media

The EPA and Hot Rod Culture

This is kind of a gray area for me. Obviously, being a passionate car guy who’s willing to throw turbochargers on anything and really enjoys performance, it creates this internal conflict between wanting to be somebody who participates in a greener view of the future and the well-being of my passion, career and industry. Related

One Year of COVID

As we all know, March 2021 marks a full year since the Coronavirus began altering what we used to know as ‘normal life.’ I don’t think any of us will forget March 2020 when we began hearing that this then foreign flu strain was starting to make the rounds in the U.S. I remember we