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Denaliboy
11-09-2005, 02:17 PM
i got my new motor in (2.8)

it vibrates at high RPM

(this is no good cause after half a beer my gas pedal turns to on/off [15][15][15])

could this have something to do with clutch alignment?

any ideas?

[31] this drinking club has a 4X4 problem [31]

digger
11-09-2005, 03:40 PM
pilot bushing?

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GET OFF THE TIT

basher
11-09-2005, 04:29 PM
what did the new motor come out or a standard or automatic? if auto it may not have a pilot bushing

Denaliboy
11-09-2005, 04:37 PM
auto

is the pilot bushing the little bushing on the end of the standard transmission spline? if so there was no spot for it on the new block but there was on old block

(motor is from an auto, the trans is standard)

will it run without it? will it go bang?

thanks [cheers]

[31] this drinking club has a 4X4 problem [31]

u2slow
11-09-2005, 04:45 PM
The balance on the 2.8L changed around 88-89. Make sure you haven't mismatched the flywheel.

Denaliboy
11-09-2005, 04:47 PM
old motor was an 86 w/standard trans, the motor that is replacing it is an 85 w/auto trans

[31] this drinking club has a 4X4 problem [31]

pumpkin
11-09-2005, 04:48 PM
The 2.8 are externally ballanced, they have 2 or 3 diferent balances, so you HAVE to have the flywheel that is mached to the engine, or it will shake your ass right out of the vehicle. Don't hate chevy's, cause I don't accnowledge any thing with lkess than a V8 as being a chev.










Gonna build me a truck

Denaliboy
11-09-2005, 05:10 PM
quote:Originally posted by pumpkin

The 2.8 are externally ballanced, they have 2 or 3 diferent balances, so you HAVE to have the flywheel that is mached to the engine, or it will shake your ass right out of the vehicle. Don't hate chevy's, cause I don't accnowledge any thing with lkess than a V8 as being a chev.
Gonna build me a truck



so then i can't change from auto to standard?

will it just shake my ass out of the vehicle or will it break?

guess we'll know soon

thanks

[31] this drinking club has a 4X4 problem [31]

Magna
11-09-2005, 11:32 PM
quote:Originally posted by Denaliboy

old motor was an 86 w/standard trans, the motor that is replacing it is an 85 w/auto trans
At the start of this thread, you asked if it could be clutch alignment. I take it then that you DID NOT swap the engine and trans....just the engine?

'86 1/2 and up 2.8's are internally balanced.....pre '86 1/2 is externally balanced.
So yeah, Pumpkin is right about you need to use the flywheel that is matched to the engine.



'86 S10 Blazer
2.8 with stuff done


My mind's a blank

pumpkin
11-10-2005, 03:38 AM
You need to find a knowlegeable machine shop that can get you the information on what balance the engine you have is and get a flywheel to match. If you run it out of ballance you'll wipe the bearings out of it in no time. And if you didn't put a pilot bearing in when you fix the flywheel problem you can also put in the bearing.










Gonna build me a truck

Denaliboy
11-10-2005, 04:24 PM
ok thanks Bob

[31] this drinking club has a 4X4 problem [31]

u2slow
11-10-2005, 05:37 PM
quote:Originally posted by Magna

[quote]
'86 1/2 and up 2.8's are internally balanced.....pre '86 1/2 is externally balanced.


Wierd... I show a 82-84 version, 85-87 version, and the 88-93 version for the 2.8L S10. That's from the Hollander Interchange.... the same info most of the autowreckers use.

Magna
11-10-2005, 05:55 PM
quote:Originally posted by u2slow

[quote]Originally posted by Magna
Wierd... I show a 82-84 version, 85-87 version, and the 88-93 version for the 2.8L S10. That's from the Hollander Interchange.... the same info most of the autowreckers use.
Yeah...there's a lot of misinformation out there...I'll try not to add to it. I rebuilt my 2.8 a little while ago and did a ton of research on the little 2putt8.

Up to '85 and half way into '86, the 2.8 was externally balanced, had a two piece rear main seal, small main journals, and were carburated. 110 horse, 148 torque.
The latter half of '86, the 2.8 was internally balanced, switched to a one piece rear main seal, larger main journals, and moved to the TBI injection system with computer control. 125 horse, 150 torque.

Starting in '87, they went to a serpentine belt system.


Since mine needed a rebuild....it didn't cost much more to add some ponies.
I bored .030 over, stroked to 3.1, balanced, cammed, hypereutectic pistons....it's now a 3.2
Putting out approx 170-180 horse. Future upgrades include: chip, headers, holley TBI, adjustable fuel regulator.




'86 S10 Blazer
2.8 with stuff done


My mind's a blank

BigBadB2
11-18-2005, 08:08 PM
do u have the original flex plate that came with the engine cause i can match balance the flywheel to the original flex plate the names steve 6048264362

Denaliboy
11-19-2005, 09:31 AM
quote:Originally posted by BigBadB2

do u have the original flex plate that came with the engine cause i can match balance the flywheel to the original flex plate the names steve 6048264362


sent ya a pm, thanks

[31] this drinking club has a 4X4 problem [31]

Denaliboy
12-06-2005, 05:06 PM
and the bearing noises start [B)]





[31] this drinking club has a 4X4 problem [31]

stuckle
12-06-2005, 05:53 PM
still havent done it?

wtf dude get r dun
haha