3100 Valves

[12Gauge]

Ok, lol i think i got some bad intake valves in cylinders 1&3. A friend has a set of heads from a 93 or 94 3100, no roller rockers, but are the valves the same as my 97 3100? Hoping they are and the seats arent beat all to hell in my heads. Pray for me, lol.

[IsaacHayes]

hehehe. What year is your 3100? If it's pre 2000, then the valves should be the same.

[bszopi]

What year is your 3100?

Really??? And I thought I was getting old...

but are the valves the same as my 97 3100?

[12Gauge]

lol ok thx guys, but they should be the same right, i tried to cross reference some parts lists but man i guess im not doing my searches right. I think ill be yankin the heads off tonight, see what happens tomorrow, if the valve seats arent torn up i should be ok. Ill just swap out the valves and cross my fingers. No budget at all left now, lol. gonna drain the oil and the coolant and save it, cause im gonna have to reuse it.

[SappySE107]

Yup, identical valves for intakes from 86? to 99 for the 2.8/3.1/3100 engines (aluminum head). 3400 got a 1.76" intake while the older ones are 1.72.

[12Gauge]

man that is sweet. thanks, i was just waiting for someone else to chim in and confirm it befor i set out to further FUBAR the engine. Thx Sappy, Bszopi, Isaac.

This site is freakin awsome. Cheers

[IsaacHayes]

Good luck! hopefully valves is all you need and you'll be set!
Brad: yes my memory is getting bad. I'm pretty sure it wasn't an 2000+ model, but I don't trust my memory. lol. I don't know what's wrong with me. Too many people posting about too many similar thigns I guess. Or maybe it's all the booze... lol

[12Gauge]

yup bent valve on cylinder 3, waiting on valve to finish it off, rained all day, must have looked uber cool with my yellow rain poncho.lol.

[IsaacHayes]

So is the valve seat ok? Sure does rain a lot over where you are..

[tractorman]

Are you having a machine shop fix the head, or are you doing it yourself?

If this is a DIY job, then at a bare minimum... you need to get some lapping compound and lap that valve seat with the new valve. This isn't so much to make it seal (though it'll help). The point is to look at the wear pattern when you lap it and make sure the valve is gonna seal all the way around (even wear pattern from the lapping compound, no gaps)- so you'll be sure that your seat wasn't damaged, too. Also make sure the seat is good and tight and isn't cracked. Make sure the head isn't cracked and the valve guides ain't loose.