mack88 Posted July 28, 2017 Share Posted July 28, 2017 My 87 has a tick when its driven and warmed up. Not a constant tick, more of a hit and miss tick. Doesn't do it when it's cold. Thought it was my air conditioner but it's not. that oil is good steped on the clutch still there. Oil pressure is good. Could it be an injector going bad? Thinking if it was a valve, it would be a constant tick. Any ideas? Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/50590-350-4v-e6-engine-tick/ Share on other sites More sharing options...
Mack Technician Posted July 28, 2017 Share Posted July 28, 2017 Never a wrong time to pop the valve covers and take a look at clearances. Quote Link to comment https://www.bigmacktrucks.com/topic/50590-350-4v-e6-engine-tick/#findComment-375988 Share on other sites More sharing options...
mackey58 Posted August 1, 2017 Share Posted August 1, 2017 Just had injectors put in a 90 Rd with a em6 300 l still gave a tick and smokes doesn't use oil about a quart a week think the boss should have done a overhaul Quote Link to comment https://www.bigmacktrucks.com/topic/50590-350-4v-e6-engine-tick/#findComment-376301 Share on other sites More sharing options...
BGarofalo Posted August 2, 2017 Share Posted August 2, 2017 I've seen e6 valve guides loosen and start moving up and down causing a ticking noise. Does it have an American Bosch aka (ambac) injection pump on it? Quote Link to comment https://www.bigmacktrucks.com/topic/50590-350-4v-e6-engine-tick/#findComment-376390 Share on other sites More sharing options...
mackey58 Posted August 2, 2017 Share Posted August 2, 2017 On mine yes Quote Link to comment https://www.bigmacktrucks.com/topic/50590-350-4v-e6-engine-tick/#findComment-376426 Share on other sites More sharing options...
dogg rescue Posted August 2, 2017 Share Posted August 2, 2017 Could it be the air compressor? Quote Link to comment https://www.bigmacktrucks.com/topic/50590-350-4v-e6-engine-tick/#findComment-376435 Share on other sites More sharing options...
MT-FUEL-CORP Posted August 3, 2017 Share Posted August 3, 2017 I have a 686st .. 1986...E237. It's not the original engine..I bought it as is...I had a ticking noise that would come and go..Thought it was a lifter. Turned out to be a bad head gasket...the ticking sound was coming from where the head meets the block in one spot. Once I figured it out, you could actually see it leak and tick. Easy fix..new head gasket..all good for a year now..maybe this will help.. Quote Link to comment https://www.bigmacktrucks.com/topic/50590-350-4v-e6-engine-tick/#findComment-376546 Share on other sites More sharing options...
mackey58 Posted August 3, 2017 Share Posted August 3, 2017 New compressor on mine Quote Link to comment https://www.bigmacktrucks.com/topic/50590-350-4v-e6-engine-tick/#findComment-376558 Share on other sites More sharing options...
IH Farms 2 Posted August 11, 2017 Share Posted August 11, 2017 I had a tick that would come and go. Then is got constant taught it was a band clamp on the exhaust. Ended up losing a lift and the cam so I'd check your valve train out Quote Link to comment https://www.bigmacktrucks.com/topic/50590-350-4v-e6-engine-tick/#findComment-377216 Share on other sites More sharing options...
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