youen
Member
I just buy a boat fitted with a kamd 300 with 560 hours.I am quite sure the valves clearance was never checked.What can happen
Thanks a lot
Youen
Thanks a lot
Youen
Volvo kamd 300
- Thread starter youen
- Start date
volvopaul
Well-known member
The whole valve train wears considerably quick if the boats only been used on the rivers at slow speed as the oil does not get around the rockers to the exhaust vale fingers.
Would get them checked asap as the ball studs wear out down to nothing then the pushrod falls out.
Volvo are aware of this but basically washed there hands of it as they said, and this was in a written report to us , that the engine should be run at cruising speed all the time and was not designed to run at a slow river speed.
NOWHERE in any volvo literature or workshop manuals does it ever say this, the boat I was particularly involved with was a Broom 38, now these was sold to a river based dealer so they knew who they were selling it to, missale of goods act I think, IE not fit for purpose intended, etc.
Get them checked and make sure they are VP trained as there is a set way of carrying out the adjustments.
Would get them checked asap as the ball studs wear out down to nothing then the pushrod falls out.
Volvo are aware of this but basically washed there hands of it as they said, and this was in a written report to us , that the engine should be run at cruising speed all the time and was not designed to run at a slow river speed.
NOWHERE in any volvo literature or workshop manuals does it ever say this, the boat I was particularly involved with was a Broom 38, now these was sold to a river based dealer so they knew who they were selling it to, missale of goods act I think, IE not fit for purpose intended, etc.
Get them checked and make sure they are VP trained as there is a set way of carrying out the adjustments.
nicho
Well-known member
[ QUOTE ]
I just buy a boat fitted with a kamd 300 with 560 hours.I am quite sure the valves clearance was never checked.What can happen
Thanks a lot
Youen
[/ QUOTE ]
See the other post on this subject - things can, and do get very nasty!
I just buy a boat fitted with a kamd 300 with 560 hours.I am quite sure the valves clearance was never checked.What can happen
Thanks a lot
Youen
[/ QUOTE ]
See the other post on this subject - things can, and do get very nasty!
spannerman
Well-known member
If the clearance is too small which is not often then the valves won't close fully.
More often the clearance is too big as on the the 3 KAD 300's I serviced last week.
Now what happens is that the valve closes very abrubtly instead of the follower riding smoothly down the back of the cam lobe, this causes the valve to slam into its seat and can cause the valve neck to stretch and eventually snap resulting in valve heads bouncing round in the cylinder.
This happened on the MBM's own boat some years back and was because the dealer couldn't be bothered to lift the floor in the saloon to get the valve covers off, its easy to check as you have to replace the all 13 copper washers on the return rail and you can see if they look shiny and new.
Also the paint around the injector pipes should be disturbed when they where disconnected.
More often the clearance is too big as on the the 3 KAD 300's I serviced last week.
Now what happens is that the valve closes very abrubtly instead of the follower riding smoothly down the back of the cam lobe, this causes the valve to slam into its seat and can cause the valve neck to stretch and eventually snap resulting in valve heads bouncing round in the cylinder.
This happened on the MBM's own boat some years back and was because the dealer couldn't be bothered to lift the floor in the saloon to get the valve covers off, its easy to check as you have to replace the all 13 copper washers on the return rail and you can see if they look shiny and new.
Also the paint around the injector pipes should be disturbed when they where disconnected.