3100 Rebuild component questions

[kill_them_all]

Alright sounds good.

I will be replacing cam, crank, rod bearings, water pump, oil pump, gaskets, rings, head bolts, can anyone think of anything else I should replace while I have the engine torn apart? Thanks.

[kill_them_all]

I am also replacing the timing chain and knurling the valves.

[geoffinbc]

Yea sounds good. You mean knurling the valve guides right?? Well dont do it unless it is needed. It is often not needed. My 3.4L had 110,000Km on it and it was well within spec.

[TheProfessor]

what does knurling mean

[geoffinbc]

They use a tool to depress ridges in the guides. By depressing ridges inward on some parts it forces the metal around it to expand inward. Effectivley making the guide smaller to make up for wear. But like I said it is rarley needed.

Check it out here http://www.aa1car.com/library/ar696.htm

Here is a quote from it

Though still used by some small shops, most professional engine rebuilders see knurling as a short term "quick fix" that doesn?t hold up as well as guide liners, new guides or valves with oversized stems. Knurling should only be considered as a guide repair option if guide wear is minimal (less than .006 in.). And even then, it may not provide satisfactory results.

Knurling typically decreases the inside diameter of the guide where it needs it the least, namely in the center where there is the least wear rather than at the ends where the wear is usually greatest. When the knurling tool is run through the guide, it leaves behind a spiral groove. The groove acts like a furrow and raises the metal on either side. This reduces the inside diameter of the guide so a reamer can then be used to resize the guide back to (or close to) its original dimensions. The grooves also help to retain and seal oil better than a smooth bore guide. This allows somewhat tighter guide-to-stem clearances (as close as .0007 in.). But the bearing surface area created by knurling is not that great, so it won?t last as long as a guide that offers greater bearing area.

[TheProfessor]

i see yeah thats kinda what i thought

[kill_them_all]

I have to knurl the valve guides as part of the overhaul, it is a class requirement. The heads have about 182k on them. It does not bother me to knurl them.

I purchased a head gasket kit made by felpro today, comes with all the gaskets I need.

Just a few quick questions about it:

The kit has 4 egr gaskets I only noticed two on the valve when I removed it, where are the other two located?

And the kit includes push rod guides, where are these located and will I need them? I am not familar with cylinder heads.

The kit says "exhaust pipe packaging not included" what is the exhaust pipe packaging, it includes exhaust manifold gaskets.

Thanks.

[Hybird]

The kit has 4 egr gaskets I only noticed two on the valve when I removed it, where are the other two located?

Im guessing that they included the gaskets for the digital EGR as well as the Electronic. When I got my gasket set for my 2L TBI they included many gaskets for the MPFI type, so I ended up not using them all.

The kit says "exhaust pipe packaging not included" what is the exhaust pipe packaging, it includes exhaust manifold gaskets.

Likely just means the dougnut that goes inbetween the down pipe and manifold. That crushed metal ring that seals the manifold as it enters the downpipe.

as for the guides someone else will have to answer that.. I dont wanna guess at it and give you the wrong answer.

And clean the EGR up with carb cleaner remove the old gaskets clean the surfaces smooth again, and put it back together with the new gaskets.. provided they give you them.. cause when those things fail you will have to open it up and clean it and IIRC you cant buy just the single gaskets. Thats unless you have money for a new EGR. Just a heads up

---------EDIT sorry just noticed the date.-----

[geoffinbc]

The guides go on the heads under the pushrod studs. You will not have any if you have a 3100 with roller rockers. Pushrod guides are for engines with non self aligning rocker arms. This would apply to Gen 1, 2 and 1995 and earlier Gen 3's