M42 ticking coming from head during idle then will go away?!?

[bsturman92]

Ok so for a while when I start my car and is idling it makes a tick tick tick noise then will randomly stop... Then start again.... Sometimes go away when I give it gas.... But it's deaf coming from the head what do u think it could be

[Quadrajet]

Cam follower. Similar to a lifter tick on domestic cars. Have had the same thing with my old daily for years. Mine will do it till the motor warms up, then I don't hear it again, till this motor has sat for a few hours.

[bsturman92]

Any way to resolve it? Car sat the last 3 days and is now louder than ever

[Dj Buttchug]

Cam follower. Similar to a lifter tick on domestic cars. Have had the same thing with my old daily for years. Mine will do it till the motor warms up, then I don't hear it again, till this motor has sat for a few hours.

Not similar to lifter... it is lifters.

its normal in higher mileage m42s. change to a higher viscosity oil to quite it down

edit: If car sat for a long time 100% LIFTERS.

Drive it around and get the oil pressure up. above 3k rev. it will stop

[Quadrajet]

I meant similar, only in the fact that most SOHC domestics used a cam-lifter-pushrod-rockerarm setup.

Switching to a thicker viscosity oil didn't help, even when it started to get cold up here.

[Nick_S]

I've always run 10w40 in my m42 but to keep the lifters quiet on my m50 I run 20w50. Works pretty well.

[Dj Buttchug]

I meant similar, only in the fact that most SOHC domestics used a cam-lifter-pushrod-rockerarm setup.

Switching to a thicker viscosity oil didn't help, even when it started to get cold up here.

thats because these style require adjustment and are not self adjusting like the m42 ones.

[Balkanac]

i have had the same noise since i got the car.
I ran the oil flush and used fully syn 0W40. Drove it on the open road for a few hours doing 120-130km\h and when i got back home the noise was gone
But then i left it for a few days and when i started it the noise was back for a few seconds
I guess they need to be replaced

[Balkanac]

i have had the same noise since i got the car.
I ran the oil flush and used fully syn 0W40. Drove it on the open road for a few hours doing 120-130km\h and when i got back home the noise was gone
But then i left it for a few days and when i started it the noise was back for a few seconds
I guess they need to be replaced

[Quadrajet]

thats because these style require adjustment and are not self adjusting like the m42 ones.

Actually they were manually adjusted only on the High Perf models in the 50s 60s early 70s -labeled mechanical cams, many 300-350hp motors had hydraulic adjustable lifters-labeled Hydraulic cams. Once emissions started to get around it spelled the doom of the Mechanical cam in domestic cars.

When I got into E30's I was surprised the valvetrain didn't utilize "set once" hydraulic lifters. But a collapsed lifter sucks just the same.

[I8UR911]

Its not lifters...... its a crack in the exhaust manifold. It goes away when warm because when hot the manifold expands sealing the crack. Been there, done that :)

Sent from my XT907 using Tapatalk 2

[Vtec?lol]

Its not lifters...... its a crack in the exhaust manifold. It goes away when warm because when hot the manifold expands sealing the crack. Been there, done that :)

Sent from my XT907 using Tapatalk 2

a possibility although less common.