Post by dodgerover on Jan 27, 2015 13:02:32 GMT 1
A quick run up to South Yorkshire last Sunday to get some tidying done on my van and an MOT resulted in the van going on 3 cylinders for the last 30 miles.....
Compression tests showed 100, 80, 25 and 125 psi, so Monday afternoon was spent pulling the head off. All the exhaust valves were really really badly recessed - so bad in fact that they wouldn't recut.
Luckily I picked up a head Monday evening reputed to come from a 2.0 Cortina which had been stored for years
Tuesday I stripped the new head and reground the inlets, recut the exhaust seats and fitted new exhaust valves.
This is where it gets wierd - the cam in the new head is of an unknown grind and had some surface rust - nothing bad but I thought i would stick with my existing one. BUT the van cam didn't fit the new head?
The van cam is marked H20 and the Cortina one is H28 both are Ford - luckily the surface rust cleaned off ok and its not touched the hardening
So Wednesday I practised for a walk on part in ice road truckers by refitting the 'new' head outside in about 8 inches of snow.
Luckily after it settled down and we reset the valve clearances all is good although the cam grind must be slightly difference as the torque curve has changed a bit.
Thursday was MOT time and the MOT man was quite complementary about how solid it was (its never been welded underneath!), got a straight pass with no advisories.
Am now back down South and am going to set up the spare flashlube valve saver system I've got to try and make these valves last a while.
So the main question is any idea what the new head and cam might have come from?
Compression tests showed 100, 80, 25 and 125 psi, so Monday afternoon was spent pulling the head off. All the exhaust valves were really really badly recessed - so bad in fact that they wouldn't recut.
Luckily I picked up a head Monday evening reputed to come from a 2.0 Cortina which had been stored for years
Tuesday I stripped the new head and reground the inlets, recut the exhaust seats and fitted new exhaust valves.
This is where it gets wierd - the cam in the new head is of an unknown grind and had some surface rust - nothing bad but I thought i would stick with my existing one. BUT the van cam didn't fit the new head?
The van cam is marked H20 and the Cortina one is H28 both are Ford - luckily the surface rust cleaned off ok and its not touched the hardening
So Wednesday I practised for a walk on part in ice road truckers by refitting the 'new' head outside in about 8 inches of snow.
Luckily after it settled down and we reset the valve clearances all is good although the cam grind must be slightly difference as the torque curve has changed a bit.
Thursday was MOT time and the MOT man was quite complementary about how solid it was (its never been welded underneath!), got a straight pass with no advisories.
Am now back down South and am going to set up the spare flashlube valve saver system I've got to try and make these valves last a while.
So the main question is any idea what the new head and cam might have come from?