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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-20-2005, 12:19 PM   #101
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Quote:
Originally Posted by opensourceguy
It'* composed of a metal rod, with rockers mounted on it. Little stamped steel rockers, that look like plastic.


-justin
lol, what are you talking about?

Alec_b - The 1986 Vin 3 was the first to get roller lifters. I can only assume this carried over.
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Old 01-20-2005, 01:33 PM   #102
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Straitor.. wherever you may be, can you take a pic of your rockers for me, please? I don't have a good pic of 'em to scan in. It'* a whole different valve train in the LG3.


-justin
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Old 02-06-2005, 04:52 PM   #103
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It'* been a while, figured i'd update you guys with my progress.

I have the Rear Header lip removed [rough], awaiting the final sand down.

I have three intake ports finished [entire Rear Cylinder Head], and just cleaned the carbon off the exhaust ports on the Rear. The carbon removal took quite a bit of time.. about 20 minutes for all three.. amazing how strong that crap is! The Front Cylinder Head hasn't even been touched.. still has the rockers bolted up. I am waiting to touch the Front Head until I get the Rear Head all ready for decking, so I don't get parts mixed up.

The cool part, was it only took me 1.5 hours to do the progress I have on the Rear Cylinder Head.. I am amazed at that little time. I thought it was going to be more like 1.5 hours for one port. I'll hit you guys up with some pics the next time I bring the heads out.. you should see the carbon dust I had all over my porch! I am glad I did it outside, otherwise I would have a lot of cleaning up to do..


-justin
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Old 02-07-2005, 04:19 AM   #104
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Quote:
Originally Posted by opensourceguy
Straitor.. wherever you may be, can you take a pic of your rockers for me, please? I don't have a good pic of 'em to scan in. It'* a whole different valve train in the LG3.


-justin
My 87 heads have non-roller rockers.
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Old 02-07-2005, 07:46 AM   #105
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Finally, you came out of your hole. When you going to have them rockers ready, man? I am getting ready to send the heads off to the Machine Shop.. and after that I am going to start re-assembling her.


-justin
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Old 03-21-2005, 11:46 PM   #106
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You should seriously talk to an engine builder about getting cutsom length pushrods at least. Taking .085 off you heads is a large amount of material and i know it'* been suggested to me if i go 30 over to get custom length pushrods.
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Old 03-22-2005, 07:37 AM   #107
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Well, would I know if I would need them when I put the engine back together? Like the rockers and such wouldn't fit quite right? If I can't tell at that point, I don't see where the problem could be. The lifters are hydraulic [I am sure you know this], so they do compensate a little. Then the rockers also auto adjust [when you torque 'em down]. I already have probably about .02" of wear on the valvetrain, at the least. I am not doubting your knowledge, I see where you are coming from.. but I am not sure I need it [if it isn't necessary, I won't do it].


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Old 03-22-2005, 12:30 PM   #108
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is it possible to bend vavles if you didnt get custom pushrods
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Old 03-22-2005, 02:41 PM   #109
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Quote:
Originally Posted by opensourceguy
Well, would I know if I would need them when I put the engine back together? Like the rockers and such wouldn't fit quite right? If I can't tell at that point, I don't see where the problem could be. The lifters are hydraulic [I am sure you know this], so they do compensate a little. Then the rockers also auto adjust [when you torque 'em down]. I already have probably about .02" of wear on the valvetrain, at the least. I am not doubting your knowledge, I see where you are coming from.. but I am not sure I need it [if it isn't necessary, I won't do it].


-justin
Yeah those lifters are hydraulic and will adjust a little but only a little like if you deck your heads 10 or 20 over to make them flat. but those hydraulic lifters can colapse and fail if there put under too much pressure. Seriously, just do more(more cause i know you have) research, you may be able to find the ones with the correct dimensions used. Like, they might have been the same dimensions.
Or maybe you can put small .030, high hardness # shims under the pedistals. (Don't know if it'* a great idea or not, just thought of it) With the .085 taken off, you should get slightly higher lift (not positive) so you wouldn't be decreasing lift with the washers.

I understand your low on $ but if you think that "valve tap" was bad before you took your engine apart, it might sound like crap when you slap it all back together.
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Old 03-22-2005, 04:22 PM   #110
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Hmm.. that'* a good idea. Do they make shims for lifters? Because I am sure you know that the lifters have a seat in them and I doubt my rods would stay in there without them. How much extra lift are we talking about here? I would like a little extra lift, because I make so little as it is, and that will probably be the biggest bottleneck as far as flow [minus the headers].

And to be honest, my valve tap wasn't all that bad. It was noticable on the rear bank, but only if you were listening for it.

I'm thinking some larger lifters [like you suggested] may be the best option. I'm not sure how I could go about purchasing them, without having them in front of me and measuring them. Which would probably be difficult since I doubt Autozone would allow me to go through their entire inventory of lifters [if they even had any]. I'll look into it. Maybe Comp Cams lists their lengths, if not --perhaps I can call their overseas tech support, where 3" sounds like tree.


-justin
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