Need help with my Merc.470 (big block 4-cylinder...LOL) engine...

[marioc]

Can anyone tell me if there is a special tool/trick in getting to the No.1 spark plug (behind the metal coolant reservoir) without taking the reservoir off and therefore needing a new gasket, seal, etc...

Thank you!

 

[missalot]

Re: Need help with my Merc.470 (big block 4-cylinder...LOL) engine...

I took a sparkplug socket, the kind that have a hex built into the end. Then cutout some of the body and welded it back together. The spark plug top just about pokes out there the ratchet would insert. Then I just use a wrench to turn the socket - slow, but works.

 

[1977 SILVERLINE]

Re: Need help with my Merc.470 (big block 4-cylinder...LOL) engine...

Ya they are pretty tight but I have a craftsman spark plug socket with a hex on the top. I did not have to modify the tool at all but I did have to use a wrench instead of a ratchet.

 

[nola mike]

Re: Need help with my Merc.470 (big block 4-cylinder...LOL) engine...

Standard socket/wobble joint/extension works fine for me.

 

[marioc]

Re: Need help with my Merc.470 (big block 4-cylinder...LOL) engine...

Thanks Silverline...
This is what I used for the No.4 cylinder, but as you mentioned, I might have to grind down one of my wrenches to fit...

 

[marioc]

Re: Need help with my Merc.470 (big block 4-cylinder...LOL) engine...

Standard socket/wobble joint/extension works fine for me.

I'll give this a shot, also... Thought about trying this, but my u-joint socket was broken...so I'll be buying a new one.

I appreciate the input...

 

[nola mike]

Re: Need help with my Merc.470 (big block 4-cylinder...LOL) engine...

I'll give this a shot, also... Thought about trying this, but my u-joint socket was broken...so I'll be buying a new one.

I appreciate the input...

and are you talking about the #1 cylinder (closest to the bow) or #4 (stern)?

 

[fmalott]

Re: Need help with my Merc.470 (big block 4-cylinder...LOL) engine...

and are you talking about the #1 cylinder (closest to the bow) or #4 (stern)?

when i did my rebuild this winter the number 1 and 2 spark plugs where easy to get out it was the number 3 and 4 that where hard to get out because of the riser

 

[marioc]

Re: Need help with my Merc.470 (big block 4-cylinder...LOL) engine...

and are you talking about the #1 cylinder (closest to the bow) or #4 (stern)?

Yes, that is correct...

No.1 being "bow" and No.4 being at the stern...

 

[marioc]

Re: Need help with my Merc.470 (big block 4-cylinder...LOL) engine...

I'm not near my manual, but is the No.1 not the cylinder closest to the bow?

 

[fmalott]

Re: Need help with my Merc.470 (big block 4-cylinder...LOL) engine...

I'm not near my manual, but is the No.1 not the cylinder closest to the bow?

yes front of motor what's confusing to every body the number 1 & 2 plugs are behing the exhaust manifold very easy to remove, the number 3 & 4 are behing the riser and exhaust manifold that's why there difficult to get out here is a picture the red arrows point to plugs you can see the where the riser is in the way of #3 and #4plugs

 

[marioc]

Re: Need help with my Merc.470 (big block 4-cylinder...LOL) engine...

yes front of motor what's confusing to every body the number 1 & 2 plugs are behing the exhaust manifold very easy to remove, the number 3 & 4 are behing the riser and exhaust manifold that's why there difficult to get out here is a picture the red arrows point to plugs you can see the where the riser is in the way of #3 and #4plugs

So, I just picked up these little socket cap sets to put on the end of the spark plug socket... Let you know how this works...