Thread: valve train problem

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I have excessive clatter on the #3 intake or exhaust valve to the point where the engine dies for a second. I tried to set the rocker to specs and it goes a way but comes back...... any ideas what this might be..... the head was rebuilt 5000 miles ago.... new roller lifters and rocker arms and push rods

The vehicle is a 1988 formula 305 tbi and help would be great
Kenny

p.s 60 psi when i start the pig and between 15 to 20 at idle a 500rpm which has to be raised to 600 rpm

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Pressed-in rocker studs may be pulling out of the head

Originally posted by drumsk
I have excessive clatter on the #3 intake or exhaust valve to the point where the engine dies for a second. I tried to set the rocker to specs and it goes a way but comes back...... any ideas what this might be..... the head was rebuilt 5000 miles ago.... new roller lifters and rocker arms and push rods

The vehicle is a 1988 formula 305 tbi and help would be great
Kenny

p.s 60 psi when i start the pig and between 15 to 20 at idle a 500rpm which has to be raised to 600 rpm

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Check the studs like tech said, but are you checking the compression with the motor running, or am i reading it wrong?

Have not done a compression check all around yet...........

the stud maybe be pulling out becuase the tick went away for a week and came back but I also added marvel mystery oil

I am running a crane cam and a set of crane lifters........

Kenny

if this this a roller cam engine? i think it sound like a stud like tech said

OK the 60 psi is oil pressure.

Lay a straight-edge across the top of the studs and you'll be able to see if any are pulling out.

how do i fix it if the stud is pulling out........... head has to come off.......... which is not a big deal I put the engine together............

only has 5000 miles on her besides the ticking she was running great and a slight exhaust leak

Originally posted by drumsk
how do i fix it if the stud is pulling out........... head has to come off.......... which is not a big deal I put the engine together............

only has 5000 miles on her besides the ticking she was running great and a slight exhaust leak

how good are you with a hand drill and a tap you can drill and tap it but you have to be rigth on and do not get chips in the engine

Originally posted by drumsk
how do i fix it if the stud is pulling out........... head has to come off.......... which is not a big deal I put the engine together............

only has 5000 miles on her besides the ticking she was running great and a slight exhaust leak

drive it back down to where its suppose to be and drill it and install a roll pin in it. be carful not to get any shavings down in the motor

well I am work as a mechanic for a fueling company at newark airport. So I am quite good with a drill plus I like to restore old car's(69 firebird, 67 t-bird) so roll pin and drill ehhhh..... should I use a right angle dill or will a normal drill do? Also can I go in on a 90 or do i go in on an angle.......

I have enclosed a pic of my car tell me what you think

I just had her painted

Originally posted by drumsk
well I am work as a mechanic for a fueling company at newark airport. So I am quite good with a drill plus I like to restore old car's(69 firebird, 67 t-bird) so roll pin and drill ehhhh..... should I use a right angle dill or will a normal drill do? Also can I go in on a 90 or do i go in on an angle.......

I have enclosed a pic of my car tell me what you think

I just had her painted

you can pin it. but you can buy a stud and tap the head this may be a better way to go

car still has to be buffed out by the man that painted it

is this something a local pats house would have...........

Kenny

yes they did have them dorman had them they were just a stud fine on top and coarse on the bottom and i do not think you had to drill it out much to tap it car looks very good