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Replacing "dog bone" engine bushings

7.7K views 41 replies 11 participants last post by  gt601  
#1 ·
Could anyone help me out with replacing the two dog bone engine bushings? I don't have a bushing/bearing press and I don't see it being very easy to remove the triangular bracket that holds the smaller bushing. There's lots of talk about people switching to poly, but nothing about removing and replacing these. Any help is appreciative! Also, pictures of your method would be very helpful!

Thanks!
 
#32 · (Edited)
Here are the valve clearance results:

Cylinder -- Intake ------- Exhaust ------------- Shims Needed (for intake)
1 ------- .017" ---------- .008" ----------------------- .051mm
2 ------- .015" ---------- <s>.003"</s> .008" ----------------- .101mm
3 ------- .013" ---------- <s>.007"</s> .008" ----------------- .152mm
4 ------- .014" ---------- .008" ----------------------- .127mm
5 ------- .014" ---------- <s>.005"</s> .008" ----------------- .127mm
6 ------- .014" ---------- <s>.007"</s> .008" ----------------- .127mm
 
#34 ·
Yes, I agree! The exhaust valves literally took seconds to loosen, adjust to proper spec and tighten. Besides obviously taking the T belt off, what is involved in adjusting the intake valves? How do I know what (shims?) to buy? Would is be a good idea to replace valve stem seals while I'm in there or is it no possible to change them with the heads on the car?
 
#35 ·
You do not have to touch the timing belt. The cams will come out by separating the cam pulleys. You need to take out the cams, measure the existing shims under the cams followers. You use a bigger or smaller shim depending on what the final clearance you are trying to get. The complete procedure is outlined in the shop manual. I have a full set of shims so replacement shim selection is not a problem. The valve stem seals a replaceable with the heads on, but not really an easy job. I would not bother with them until you decide to rebuild the heads or engine.
 
#36 ·
Alfa V6 12v engines 1981 to 1993.

I doubt you will find intakes out of tolerance enough to worry about, so cams will not have to come out to just adjust the exhaust rocker arms.

I try to keep exhaust rocker arm clearances set to about .009" (.0088 to .0098") to keep the chatter talk down.

Intakes are .0187 - .0197" so I will even let .017 to .020" fly until I actually have a need to pull a cam. Usually they are not the noise makers until they get in mid twenties and will not start to burn with low clearance until there is nearly none.