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Old April 20th, 2015, 01:59 PM
Landy_Andy's Avatar
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1999 D2, 1985 D100 Truggy & 1951 S1
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Location: Revelstoke, BC, Canada
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LS specific engine issues & discussion

Thought I'd start this as a seperate thread.

As I'm doing a freshen up of my cheap junkyard LM7 I've been learning a few things about these LS engines :

1. All early LS1's & iron blocks suffer from oil starvation to the passenger side rockers & pushrods, was fixed on later alum blocks. So, if you get a older/high mileage engine pull the rockers & check the pushrod tips for wear, they should be nice & shiny with no scoring

2. Most LS rockers use open cage bearings & it's common for them to loose needles. It's highly recommended to replace them, I'm using the Summit Racing bearing & trunion upgrade for a 100% fix, link

Good link here about both issues Retro LS Build: Rocker Arm Trunion Upgrade | CC Tech - Corvette Blog, Restoration and Repair

Hope that helps !

------ Follow up post added April 20th, 2015 11:04 AM ------

If you want to do a basic cam upgrade these are the parts the guys on Engine Power used in their 4.8 budget build, made a decent difference for not a huge $ input :



And if you need them, followers

Plus the trunion upgrade as noted in my first post.
D100 5.3 LM7 Gen III powered truggy under construction....
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