dieseldave71 Posted March 20, 2012 Share Posted March 20, 2012 Anyone know offhand what the lash #'s are for an early '90's 300 EM7 4 valve? I have the valve covers off of a friend's truck to look for problems with the Jake and I figured I'd better set the valves first but none of my books cover past the 2 valves. It has a 2 stage Jake (not a Dynatard) but the only way to tell that it is working is to roll down the window and listen. I drove the truck years ago and it seemed like it worked ok then, so something must have come out of adjustment since then. Any ideas? Quote Link to comment https://www.bigmacktrucks.com/topic/23970-300-em7-4-valve-valve-settings-and-jake-problem/ Share on other sites More sharing options...
smorse54 Posted March 20, 2012 Share Posted March 20, 2012 Hi, the exhaust is .024, the intake is .016. Make sure you use timing marks either on flywheel or on vibration damper.This depends on whether it's mechanical or electronic, early E-7 s were either way. As for the Jake I believe .080 is the proper clearance for that. you may want to check wiyh a dealer for that spec after you determine the specific engine model.Good luck, steve Quote Link to comment https://www.bigmacktrucks.com/topic/23970-300-em7-4-valve-valve-settings-and-jake-problem/#findComment-108874 Share on other sites More sharing options...
theakerstwo Posted March 20, 2012 Share Posted March 20, 2012 http://www.jacobsvehiclesystems.com/parts-service-support/ Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/23970-300-em7-4-valve-valve-settings-and-jake-problem/#findComment-108880 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.