10-02-2007
|
#1
|
flips McGee
|
Pull the Block?
Ok guys, the 6-bolt on my bro's 90 talon had 0 compression on cyl #2 (full results: 100-0-100-110). The block has 190k miles on it so we figure its time to do new rings and bearings, maybe new pistons a bore, not sure.
So tonight we yank the head off (thanks for the help Allan!) and sure enough the head gasket is blown out on cyl#2 and the head has a good gouge out of it. The spark plug from that cyl had a chunk missing from it, so it could have been caused by that, or possibly an overboost (ebay mbc FTL!) So we're pretty sure the head is crap, not a big deal as we have a rebuilt head ready to rock.
The cyl walls look pretty good all the way around, plenty of cross-hatching and the tops of the pistons look to be in decent shape. Cyl #1 either has a weak injector or something as it looks like it has been running a little hot. Other than that everything looks good.
So my question is, is there a way to check and see how good of shape the rings are in w/o pulling them out? The cyl wall clearance on all cyl's looks identical to the naked eye, all pistons in decent shape. We're considering putting on a new head gasket, a set of arps, and a rebuilt head and seeing how she runs. Is this a bad idea? Any other ideas?
|
|
|
10-02-2007
|
#2
|
I hate everyone
Join Date: Jul 2006
Location: Blaine
Posts: 938
|
Re: Pull the Block?
I can't really think of a way to check out if the rings are fine w/ the head off, w/o pulling everything apart and measuring gaps. I'd toss the new gasket and head on, do a comp/leakdown test, and rock it
__________________
Welcome to the internet, where men are men, women are also men, and underage teens are police...
|
|
|
10-03-2007
|
#3
|
Is funding Exxon.
Join Date: Oct 2003
Location: Ham Lake
Drives: like a bat outta hell!
Posts: 7,983
|
Re: Pull the Block?
Yeah, toss the new head on and turn up the boost to make up for the lower compression
__________________
Is burning corn and stayin' warm!
My motorcycle is stock and reliable, my Talon is neither!
|
|
|
10-03-2007
|
#4
|
aka Goodbye
|
Re: Pull the Block?
Cup your hand around the cylinder and blow as hard as you can into your hands, if you hear whistling through the dipstick hole, your rings are bad.
Or just slap a good head back on and you're on your way. Rings rarely go bad in just one cylinder unless you had a massive injector leak washing down that cylinder. Sounds like everything's fine.
__________________
2009 Corvette Z51-SOLD
1992 Mitsubishi Eclipse GSX-SOLD
2013 BMW Z4-Current summer hooptie
2017 GMC Yukon-Current winter hooptie
|
|
|
10-03-2007
|
#5
|
|
Re: Pull the Block?
Put it together and run it. Back in the day John made his 309 FWHP with 105 compression and an 18G type thing.
|
|
|
10-03-2007
|
#6
|
Area code 166 represent
Join Date: Aug 2003
Location: Crystal, MN
Posts: 10,329
|
Re: Pull the Block?
Chris, we talked last night and I think you got the back-up here. Get the goodies for the new head on and we could have that beast back on the road next week.
__________________
'16 Focus ST - Daily Duty
'93 mr2 - Track car in progress
|
|
|
10-03-2007
|
#7
|
flips McGee
|
Re: Pull the Block?
Sweet! Thanks for the input guys, we're gonna take a closer look at they cylinder walls today in the daylight, but I think for the moment we're gonna do a full timing belt job on it (water pump et all) and put together a new head...we have one machined and ready to go, just need to yank the springs and retainers off of the old head...the old valves look like junk, can they be cleaned up? Going to get new valve-stem seals and toss in a set of comp cams I picked up from swifty back in april, then we'll see if this thing moves again! Maybe we'll have it ready for the dyno day.....
I actually have high hopes that the new head will actually bring compression up to 130-ish across the cyls....
|
|
|
10-03-2007
|
#8
|
back in the saddle again
|
Re: Pull the Block?
I already told you guys the answer to this question yesterday on the phone with allan.
LET ER BUCK.
__________________
My street car runs low 11's and my race car's personal best is a mid 11....
|
|
|
10-03-2007
|
#9
|
Join Date: Mar 2005
Location: Blaine, MN
Drives: '91 Automagic
Posts: 13,908
|
Re: Pull the Block?
low and uneven compression rocks, i have nothing good to say.
|
|
|
10-03-2007
|
#10
|
flips McGee
|
Re: Pull the Block?
Quote:
Originally Posted by niterydr
I already told you guys the answer to this question yesterday on the phone with allan.
LET ER BUCK.
|
I know, just looking for more opinions, and I definitely have them! Thanks man!
|
|
|
04-09-2008
|
#11
|
flips McGee
|
Re: Pull the Block?
WOW. Several months later, tossed a rebuilt head on the car and she runs like a top! Boosts awesome, now boasting cams and a nice smooth idle. Thanks for the help Mark!
|
|
|
04-10-2008
|
#12
|
wants to kick mark
Join Date: Sep 2006
Location: No Hope
Drives: Battery with wheels
Posts: 1,064
|
Re: Pull the Block?
not a problem. I was just worryed about the ice in the water pump when I took it off
__________________
Fast, Cheap, Reliable. Pick 2.
|
|
|
04-10-2008
|
#13
|
Join Date: Mar 2006
Location: Minnesota
Drives: Cars
Posts: 1,457
|
Re: Pull the Block?
Quote:
Originally Posted by scheides
WOW. Several months later, tossed a rebuilt head on the car and she runs like a top! Boosts awesome, now boasting cams and a nice smooth idle. Thanks for the help Mark!
|
awesome, are you going to give her a leak down test?
__________________
-Matt
'94 Eagle Talon TSI AWD
'06 Acura TL
|
|
|
04-10-2008
|
#14
|
wants to kick mark
Join Date: Sep 2006
Location: No Hope
Drives: Battery with wheels
Posts: 1,064
|
Re: Pull the Block?
I love how my brother comes to my house and doesn't bother to log out to post.
__________________
Fast, Cheap, Reliable. Pick 2.
|
|
|
04-10-2008
|
#15
|
aka Goodbye
|
Re: Pull the Block?
Quote:
Originally Posted by craig
not a problem. I was just worryed about the ice in the water pump when I took it off
|
That's always a good sign.
__________________
2009 Corvette Z51-SOLD
1992 Mitsubishi Eclipse GSX-SOLD
2013 BMW Z4-Current summer hooptie
2017 GMC Yukon-Current winter hooptie
|
|
|
04-10-2008
|
#16
|
Join Date: Mar 2005
Location: Blaine, MN
Drives: '91 Automagic
Posts: 13,908
|
Re: Pull the Block?
Nice, thats why i am not in a hurry to sell my old motor.
|
|
|
04-10-2008
|
#17
|
flips McGee
|
Re: Pull the Block?
Quote:
Originally Posted by AwdGSX13
awesome, are you going to give her a leak down test?
|
Possibly, we'll see. I'll do a compression test for sure, but the car runs just freaking awesome as-is. Over 180k on the bottom end, and she's good to go!
I might try and get this car up to the dyno day just to have it there. My brother is moving to florida and he's unsure if he wants to keep this sweet ride or not.
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
|