Disco Moneypit
New Member
- Posts
- 925
- Location
- North Derbyshire / South Yorkshire
Just when it was all going so well.....
Yesterday was spent removing the intake and exhaust manifolds, due to a blowing exhaust manifold gasket.
This morning was spent flushing all the gunk out of the intake manifold, whilst this afternoon was spent re-fitting everything.
The Haynes book of lies had sugested torqing the exhaust manifold studs / bolts / nuts up to 33 lb/ft. With this low number in mind I only did them up finger tight followed by 1/4 turn with the ratchet.
The first stud torqued up ok.
The second stud went loose before I got to 33 lb/ft. I solved this by turning the stud around so that the longer thread went into the head, (these studs have a gap about 1/3rd of the way down, before another thread starts).
The third stud is actually a bolt. This went 'loose' well before 33 lb/ft.
The forth stud again went 'loose' well before 33 lb/ft.
This is as far as I have got as I don't want to do any more damage. I have quadruple checked that I am reading the right figures for the torque settings, and quadruple checked that the torque wrench is set correctly. The old shared intake / exhaust manifold gasket failed in exactly the same place that these studs have gone loose. Coincidence???
So what are my options here for a novice driveway mechanic? Apply thread lock and hope for the best? Tap and die slightly larger holes and hope that I can get slightly larger bolts / studs? Add a box of matches and a gallon of petrol?
In advance, many thanks. :thumbup:
PS; it is a Discovery 300tdi.
Yesterday was spent removing the intake and exhaust manifolds, due to a blowing exhaust manifold gasket.
This morning was spent flushing all the gunk out of the intake manifold, whilst this afternoon was spent re-fitting everything.
The Haynes book of lies had sugested torqing the exhaust manifold studs / bolts / nuts up to 33 lb/ft. With this low number in mind I only did them up finger tight followed by 1/4 turn with the ratchet.
The first stud torqued up ok.
The second stud went loose before I got to 33 lb/ft. I solved this by turning the stud around so that the longer thread went into the head, (these studs have a gap about 1/3rd of the way down, before another thread starts).
The third stud is actually a bolt. This went 'loose' well before 33 lb/ft.
The forth stud again went 'loose' well before 33 lb/ft.
This is as far as I have got as I don't want to do any more damage. I have quadruple checked that I am reading the right figures for the torque settings, and quadruple checked that the torque wrench is set correctly. The old shared intake / exhaust manifold gasket failed in exactly the same place that these studs have gone loose. Coincidence???
So what are my options here for a novice driveway mechanic? Apply thread lock and hope for the best? Tap and die slightly larger holes and hope that I can get slightly larger bolts / studs? Add a box of matches and a gallon of petrol?
In advance, many thanks. :thumbup:
PS; it is a Discovery 300tdi.