Licensed to kill Posted June 30, 2021 Share Posted June 30, 2021 I did a search and found a thread that lists 16thou intake and 24thou exhaust for a 676. Sounds reasonable but just want to confirm that this are the proper settings for a 1981 E6-350. Since the valves pretty much straddle the manifold ports it is not obvious as to which are int and which are exh but i am assuming that the ones with the big honking jam nut and some goofy looking centre with a snap ring are the exhaust, is this correct?. Quote Link to comment https://www.bigmacktrucks.com/topic/67176-valve-lash/ Share on other sites More sharing options...
fjh Posted June 30, 2021 Share Posted June 30, 2021 9 hours ago, Licensed to kill said: I did a search and found a thread that lists 16thou intake and 24thou exhaust for a 676. Sounds reasonable but just want to confirm that this are the proper settings for a 1981 E6-350. Since the valves pretty much straddle the manifold ports it is not obvious as to which are int and which are exh but i am assuming that the ones with the big honking jam nut and some goofy looking centre with a snap ring are the exhaust, is this correct?. Yup ! That is the engine brake slave! 24thou! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/67176-valve-lash/#findComment-476108 Share on other sites More sharing options...
Licensed to kill Posted June 30, 2021 Author Share Posted June 30, 2021 And 16 intake? Quote Link to comment https://www.bigmacktrucks.com/topic/67176-valve-lash/#findComment-476109 Share on other sites More sharing options...
fjh Posted June 30, 2021 Share Posted June 30, 2021 (edited) 13 minutes ago, Licensed to kill said: And 16 intake? yup if its a 4 valve there is two pointers valve set pointer and a timing pointer Be careful to use the correct pointer Edited June 30, 2021 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/67176-valve-lash/#findComment-476110 Share on other sites More sharing options...
Licensed to kill Posted June 30, 2021 Author Share Posted June 30, 2021 It is a 2 valve. Te harmonic balancer has a scale starting with "TC" and going up to 35 degrees. I assume "TC" means "top centre". Then there are the marks at 120 degree intervals marked for 2&5 and 3&4 for setting those valves. I have it set on "TC" with #6 rocking and #1 with lash so that should be #1 TDC firing. As it sits, exhaust is pretty close to 24thou but the intake is tight by a few thou. Quote Link to comment https://www.bigmacktrucks.com/topic/67176-valve-lash/#findComment-476111 Share on other sites More sharing options...
fjh Posted June 30, 2021 Share Posted June 30, 2021 (edited) 20 minutes ago, Licensed to kill said: It is a 2 valve. Te harmonic balancer has a scale starting with "TC" and going up to 35 degrees. I assume "TC" means "top centre". Then there are the marks at 120 degree intervals marked for 2&5 and 3&4 for setting those valves. I have it set on "TC" with #6 rocking and #1 with lash so that should be #1 TDC firing. As it sits, exhaust is pretty close to 24thou but the intake is tight by a few thou. Your on the right track Move in firing order to the next cyls! not unusual to have the odd tight one! Push down on the exhaust adjuster to get the oil out I usually break the jam nut loose turn the adjuster tight down then back it off one half turn then set with the 24 !this gets all the oil out of the slave and avoids a false set! Edited June 30, 2021 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/67176-valve-lash/#findComment-476112 Share on other sites More sharing options...
fjh Posted June 30, 2021 Share Posted June 30, 2021 (edited) Valve cover gaskets are a pain on these ! When you put your new gaskets on clean the the gasket surface on the lid to a shine buy some edlbrock Gasket cinch/ contact cement . coat the valve cover and gasket once with the contact cement let it it go off then coat them again let it go off then stick the gasket on to the cover put the cover on the engine DRI don't use any sealer dri and clean only! Edited June 30, 2021 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/67176-valve-lash/#findComment-476113 Share on other sites More sharing options...
Licensed to kill Posted June 30, 2021 Author Share Posted June 30, 2021 Any thoughts on adjusting the dynatard switches in the valve covers??. I had to remove them to blast/paint the covers and I broke one off. Was able to get the broke piece out of the cover and have a line on a replacement (from the guy I got the engine from) but can get a new one if needed. Because they were removed they will need to be reset but i have no clue how. Quote Link to comment https://www.bigmacktrucks.com/topic/67176-valve-lash/#findComment-476127 Share on other sites More sharing options...
fjh Posted July 1, 2021 Share Posted July 1, 2021 18 hours ago, Licensed to kill said: Any thoughts on adjusting the dynatard switches in the valve covers??. I had to remove them to blast/paint the covers and I broke one off. Was able to get the broke piece out of the cover and have a line on a replacement (from the guy I got the engine from) but can get a new one if needed. Because they were removed they will need to be reset but i have no clue how. nope no tricks for that dilemma Quote Link to comment https://www.bigmacktrucks.com/topic/67176-valve-lash/#findComment-476185 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.