Removing Rocker Cover
Discussion
Hi,
I have started to get a slight tappet like sound from my engine and I was goint to check the tappets etc., I have just removed all the allen bolts from around the cover and the three in the middle.
It is refusing to budge, have i missed something or is it only the silicon holding it on.
Many thanks.
Barry
I have started to get a slight tappet like sound from my engine and I was goint to check the tappets etc., I have just removed all the allen bolts from around the cover and the three in the middle.
It is refusing to budge, have i missed something or is it only the silicon holding it on.
Many thanks.
Barry
Just answered my own question, in case any one else is ever as thick as me 
You first have to remove the spark plug cover. i.e. the black bit in the middle of the rocker cover with the three screws holding it and then inside there are six nuts to remove.
Is it just me or is it a really crappy way to secure / seal the spark plug cover. I can see that the main rocker cover needs a gasket / silicon to seal it but do other people think it is needed on the spark plug cover?
Also does any one know of an easy way to remove the shims, I would normaly have used a screwdriver or similar to compress the springs, and then a magnet tip screwdriver to remove them. Any other better ways. I have obviously never done it on a speed six before.
You first have to remove the spark plug cover. i.e. the black bit in the middle of the rocker cover with the three screws holding it and then inside there are six nuts to remove.
Is it just me or is it a really crappy way to secure / seal the spark plug cover. I can see that the main rocker cover needs a gasket / silicon to seal it but do other people think it is needed on the spark plug cover?
Also does any one know of an easy way to remove the shims, I would normaly have used a screwdriver or similar to compress the springs, and then a magnet tip screwdriver to remove them. Any other better ways. I have obviously never done it on a speed six before.
bholleran said:
Is it just me or is it a really crappy way to secure / seal the spark plug cover. I can see that the main rocker cover needs a gasket / silicon to seal it but do other people think it is needed on the spark plug cover?
Yep, crappy. However if you don't use silicon sealant on the spark plug cover water will get in and short the ignition system.bholleran said:
Also does any one know of an easy way to remove the shims, I would normaly have used a screwdriver or similar to compress the springs, and then a magnet tip screwdriver to remove them. Any other better ways. I have obviously never done it on a speed six before.
I always read that you just needed to slide the finger follower to the side against its retaining spring and the shims were then easily accessible.From a previous topic:-
said:
Tappet adjustment
To do the tappets
1. Remove the top cover all sparkplugs and camshaft cover.
2. Push rags into the plug holes just so nothing can be dropped into the bore, the rear of the head has a large oil way on the exhaust side at the end of the cam by the bulk head you have to put a rag in there also just in case a shim drops if you do the engine will have to be stripped so be careful.
3. Measure the gaps,
• Inlet is 5-7thou gap
• Outlet is 10-12thou gap,
To measure them turn the engine by a rachet or spanner until the cam lobe at its top of its lift is pointing up at you the valve should be fully closed measure each gap on all.
It is best that you make a table on paper with each valve having three boxes so you can write down the results eg inlet v1
box 1 6thou
box 2 size for shim
box 3 size of shim needed
If the back ones are more than 2thou more than max do them if not leave alone.
If the gap of the valve is to small eg 3thou then the shim needs to be smaller than the original shim to get the shim out you have to use a small bar or bent screwdriver compress the valve spring get a magnet to get the shim from the collet and repeat this on each one that is out. If the gap is to big eg 8thou then the shim needs to be bigger than the original shim.
eg shim size 294thou the needed shim would be 296thou to close the gap to 6thou .
Just be careful do not drop any thing if you do make sure you get it back you cant just take off the sump it is a full strip down to remove it as all the timing chains have to come off.
To do the tappets
1. Remove the top cover all sparkplugs and camshaft cover.
2. Push rags into the plug holes just so nothing can be dropped into the bore, the rear of the head has a large oil way on the exhaust side at the end of the cam by the bulk head you have to put a rag in there also just in case a shim drops if you do the engine will have to be stripped so be careful.
3. Measure the gaps,
• Inlet is 5-7thou gap
• Outlet is 10-12thou gap,
To measure them turn the engine by a rachet or spanner until the cam lobe at its top of its lift is pointing up at you the valve should be fully closed measure each gap on all.
It is best that you make a table on paper with each valve having three boxes so you can write down the results eg inlet v1
box 1 6thou
box 2 size for shim
box 3 size of shim needed
If the back ones are more than 2thou more than max do them if not leave alone.
If the gap of the valve is to small eg 3thou then the shim needs to be smaller than the original shim to get the shim out you have to use a small bar or bent screwdriver compress the valve spring get a magnet to get the shim from the collet and repeat this on each one that is out. If the gap is to big eg 8thou then the shim needs to be bigger than the original shim.
eg shim size 294thou the needed shim would be 296thou to close the gap to 6thou .
Just be careful do not drop any thing if you do make sure you get it back you cant just take off the sump it is a full strip down to remove it as all the timing chains have to come off.
Gassing Station | Speed Six Engine | Top of Page | What's New | My Stuff