Compression test results...

[Sean]

So, I pretty much have everything good to go to put the new top end on my Super Eta bottom end. Head, intake manifold...etc etc. All cleaned and good to go.

So, yesterday, I figured I'd better run a compression test to see how things are.

Here are my results:

165
165
165
125
135
140

I was feelin pretty good half way thru - I was like - ok, cool, things are good. Then, BAM. :?

So, here's my question - does this mean bad piston rings (car has 214,000 miles on it). As seen from the test, the ring are probably a little worn anyway. I'm not sure of the condition of the head, so it COULD be valve seats. It could be the head gasket too, right?

Is there another method I can use to test to see if it's something with my piston rings or valve seats?

I'm starting to look at everything I'd need to rebuild the bottom end, cause I'm highly considering it now.

Let me know what you guys think. :)

[Digitalwave]

You are building a stroker right? You were going to reuse your old rings or something?

[E30godz]

you can put a little motor oil into the cylinder through the sparkplug gap and try again. (like a bottlecap worth full)

if the compression raises, it means the rings are the culprit, if nothing changes its probably valve related (seats, seals, whatever)

[Sean]

TJ - My bottom end is a Super Eta, so I don't need to do anything to do a stroker. I already have the Super Eta pistons.

I was going to leave the bottom end alone.

I'll try that oil idea, and see what happens.

Quick question: If i do decide to rebuild the bottom end, what should I purchase to do so? I'm going to reuse my pistons and crank. I'm guessing I'd be reusing the rods too, right?

So, would I get the piston ring set, main bearing set, what else should I get?


Thanks for the reply!

[Digitalwave]

TJ - My bottom end is a Super Eta, so I don't need to do anything to do a stroker. I already have the Super Eta pistons.

I was going to leave the bottom end alone.

I'll try that oil idea, and see what happens.

Quick question: If i do decide to rebuild the bottom end, what should I purchase to do so? I'm going to reuse my pistons and crank. I'm guessing I'd be reusing the rods too, right?

So, would I get the piston ring set, main bearing set, what else should I get?


Thanks for the reply!

A stroker means to increase the bore and stroke of the engine. Putting a new head on and not touching the bottom end isn't a stroker.

[Jordan]

Rings
Main bearings
Rod bearings
Rod bolts
Full gasket/seal set
Recon rod small end

since you will have it out and apart, might as well get it balanced.

[UNHCLL]

leakdown test will tell you where the culprit of bad compression is.


and thats the worst idea ever.... build a "stroker" on a 200k+ bottom end and not touch a thing.

[Sean]

leakdown test will tell you where the culprit of bad compression is.


and thats the worst idea ever.... build a "stroker" on a 200k+ bottom end and not touch a thing.

:D


LOL


Yea, I know.

Thanks for the list Jordan. I would get it balanced too. I have everything added to my cart at EAP4PARTS - but, what's the Recon rod small end?



TJ - I suppose you're right. Oh well.

[Sean]

Here's the list...let me know if I'm missin somethin


8x Flywheel Bolt, 12x50mm
1x Gasket Set, Engine Block
1x Main Bearing Set, Standard
1x Oil Cap
1x Pilot Bearing
6x Piston Ring Set, Standard
12x Rod Bolt, 53mm
1x Rod Bearing Set, Standard

[rwh11385]

Part her out.


:P


TJ, if you see it as making an 2.5i into a 2.7i, it is stroking it. Although not really a 'stroker' it's making something with an eta bottom end not suck.

[Sean]

Bitch, WHAT?! LOL

NO! 8)


Yea...it's a budget stroker. So, I hope those are all the parts, gonna order it all tonight. ;)

What's the Recon rod small end though???

Part her out.


:P


TJ, if you see it as making an 2.5i into a 2.7i, it is stroking it. Although not really a 'stroker' it's making something with an eta bottom end not suck.

[arsevader]

I'd guess you should get yourself a head gasket set too.

James

[AdamF 88iS]

You forgot main bearings and head bolts.

Get the complete gasket set.

Recon the littl end means getting new bushings pressed into the end of the rods that attatch to the pistons.

This is not stuff you can do in your back yard. Ideally you would get the machine work and measuring done first before you buy the parts.

Why are you replacing the flywheel bolts?

[Sean]

You forgot main bearings and head bolts.

Get the complete gasket set.

Recon the littl end means getting new bushings pressed into the end of the rods that attatch to the pistons.

This is not stuff you can do in your back yard. Ideally you would get the machine work and measuring done first before you buy the parts.

Why are you replacing the flywheel bolts?

Yea, I'm gettin the Main Bearings:

Here's the list...let me know if I'm missin somethin


8x Flywheel Bolt, 12x50mm
1x Gasket Set, Engine Block
1x Main Bearing Set, Standard
1x Oil Cap
1x Pilot Bearing
6x Piston Ring Set, Standard
12x Rod Bolt, 53mm
1x Rod Bearing Set, Standard

Top end stuff I all already have - bolts, gasket...tons of stuff.

Flywheel bolts i'm replacing...cause - aren't they one time use? I need new ones when they are removed, correct? (need to remove my flywheel)

I was planning on rebuilding the bottom end myself - actually taking it apart and putting it together. But, I was gonna have the machine shop clean everything, and do any other needed work to the crank, rods, etc.

What other name could those bushings be called? (for the rods)


Re-read it a few times - LOL What Jordan meant - "Recondition the small end of the rods". I thought it was an actual part, that's why I was confused.

Are those just rod bushings or something?

[AdamF 88iS]

Flywheel bolts are not stretch bolts. They can be reused.

And yes, there is a bushing that can be replaced in the small end of the rods.