BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
 
HomeHome  RegisterRegister  Log inLog in  
Log in
Username:
Password:
Log in automatically: 
:: I forgot my password
Who is online?
In total there are 2 users online :: 0 Registered, 0 Hidden and 2 Guests :: 1 Bot

None

Most users ever online was 101 on Fri Nov 27, 2015 1:40 pm
Latest topics
» 2012 and up Caprice PPV
Sat Dec 03, 2016 4:36 pm by No Moa

» I wasn't even looking for this one, I swear!
Thu Dec 01, 2016 9:52 am by 95brmw

» This forum needs a pulse check.... pics included
Tue Nov 29, 2016 1:04 pm by Grumpy

» 1994 Roadmaster Estate Wagon
Tue Nov 29, 2016 10:15 am by lvd2340

» Who're You callin a Turkey?
Thu Nov 24, 2016 1:32 pm by 802

» New Ride
Thu Nov 17, 2016 8:17 am by silverfox103

» Complete SS interior.
Thu Oct 27, 2016 1:35 pm by No Moa

» 2016 9th Annual Roundup, List of Attendees
Tue Oct 18, 2016 1:04 am by MASShole9C1

» Pictures from the 2016 Roundup
Mon Oct 17, 2016 8:03 pm by toomanytoyz

Search
 
 

Display results as :
 
Rechercher Advanced Search
December 2016
MonTueWedThuFriSatSun
   1234
567891011
12131415161718
19202122232425
262728293031 
CalendarCalendar

Share | 
 

 305 Oil Leak

View previous topic View next topic Go down 
AuthorMessage
Cadet57



Posts : 4476
Join date : 2010-03-14
Age : 29
Location : Chicopee, MA

PostSubject: 305 Oil Leak    Fri Jan 04, 2013 4:29 pm

My bros '93 is leaking oil pretty bad. Looked under it today and the entire bellhouse is soaked. It's definitely oil and not ATF. It looks like the leak is from the top of the motor and goes down. However, the whole oil pan gasket is soaked from front to back. So my first thought was rear main. But would that explain the wet oil pan gasket?

Here are a couple of crappy pics


Back to top Go down
Ironfistdog



Posts : 2124
Join date : 2011-01-11
Age : 35
Location : Warren, MA

PostSubject: Re: 305 Oil Leak    Fri Jan 04, 2013 4:37 pm

1. Intake manifold gasket
2. Loose oil filter
3. Oil pressure gauge near distributor
4. Distributor seal
5. Valve cover gaskets
6. Timing chain cover
7. Rear main seal

If you take the inspection plate off, undo the torque converter bolts and slide the TC back then start the car you will see if it's the main seal. More than likely it's a rear intake seal.
Back to top Go down
Cadet57



Posts : 4476
Join date : 2010-03-14
Age : 29
Location : Chicopee, MA

PostSubject: Re: 305 Oil Leak    Fri Jan 04, 2013 4:42 pm

Ironfistdog wrote:
1. Intake manifold gasket
2. Loose oil filter
3. Oil pressure gauge near distributor
4. Distributor seal
5. Valve cover gaskets
6. Timing chain cover
7. Rear main seal

If you take the inspection plate off, undo the torque converter bolts and slide the TC back then start the car you will see if it's the main seal. More than likely it's a rear intake seal.

Can scratch 2 and 6. Filter is on right, timing cover isn't wet.

Won't sliding the TC back dump ATF out? I'd rather not do that while laying under the car...

When you say rear intake seal. Do you mean part of the rear main or the back of one of the intake manifold gaskets?
Back to top Go down
Matt Trakker



Posts : 5075
Join date : 2009-07-30
Age : 35
Location : Reading, MA

PostSubject: Re: 305 Oil Leak    Fri Jan 04, 2013 4:49 pm

I think he means at the back of the intake manifold. I believe there is a gasket there that keeps the lifter valley under the intake sealed. I'd look at the sender for the oil pressure gauge or oil pressure switch...like Indy said they're basically under the distributor...

Is it leaking real bad as in just getting all over the engine, or is it actually dripping on the ground, or even puddling?
Back to top Go down
Ironfistdog



Posts : 2124
Join date : 2011-01-11
Age : 35
Location : Warren, MA

PostSubject: Re: 305 Oil Leak    Fri Jan 04, 2013 4:56 pm

Sliding the TC back will make the TC to trans space tighter, not give it room to leak ATF.

Intake manifold gasket set is comprised of 4 different pieces, 2 hard gaskets that go along the heads, and 2 rubber gaskets one for the front one for the back. The rubber seals are garbage and should be thrown away when doing a new intake gasket. Use straight RTV on the front and rear edge and you'll have a better seal for longer.

I'm Doing a timing chain, oil pan, water pump and possibly an intake gasket on my truck very soon if you care to come down and watch the procedure If you determine that's the issue.

Every TBI caprice I ever bought had an intake leak (except this one) so ummmm actually yeah EVERY TBI I ever owned had crappy intake gasket.


Last edited by Ironfistdog on Sat Jan 05, 2013 9:17 pm; edited 1 time in total
Back to top Go down
1984twodoor



Posts : 4059
Join date : 2010-03-30
Age : 23
Location : Wilmington/Wakefield/Andover

PostSubject: Re: 305 Oil Leak    Fri Jan 04, 2013 5:08 pm

Check the sender first. It's quick, cheap, and easy. I had the same symptoms on mine a while back.
Back to top Go down
Cadet57



Posts : 4476
Join date : 2010-03-14
Age : 29
Location : Chicopee, MA

PostSubject: Re: 305 Oil Leak    Fri Jan 04, 2013 5:30 pm

Ironfistdog wrote:
Sliding the TC back will make the TC to trans space tighter, not give it room to leak ATF.

Intake manifold gasket set is compromised of 4 different pieces, 2 hard gaskets that go along the heads, and 2 rubber gaskets one for the front one for the back. They rubber seals are garbage and should be thrown away when doing a new intake gasket. Use straight RTV on the front and rear edge and you'll have a better seal for longer.

I'm Doing a timing chain, oil pan, water pump and possibly an intake gasket on my truck very soon if you care to come down and watch the procedure If you determine that's the issue.

Every TBI caprice I ever bought had an intake leak (except this one) so ummmm actually yeah EVERY TBI I ever owned had crappy intake gasket.

Yeah, I'd love to. Plus... I need to go to Tuckers. Arrow Laughing

I had to do those intake gaskets on the wagon when I got it. I'd MUCH rather do those than a rear main or something like that. What would I do to check if its the intake gaskets? Did you already type it and I missed it? Embarassed

The switch/sender is fine. You mean the one on the side of the block that works the gauge/idiot light correct?
Back to top Go down
Matt Trakker



Posts : 5075
Join date : 2009-07-30
Age : 35
Location : Reading, MA

PostSubject: Re: 305 Oil Leak    Fri Jan 04, 2013 5:43 pm

There should be 2 of those Justin, one runs the oil gauge, and that is on the side of the block, the other tells the injectors to fire basically (no oil pressure, no fuel delivery). That's a safety/EFI related one, up under the base of the distributor kind of. I know the TBI Caprices have the different intakes than the other TBIs because of the cowl overhang issue (for distributor removal) but I believe it's the same overall design?
Back to top Go down
1984twodoor



Posts : 4059
Join date : 2010-03-30
Age : 23
Location : Wilmington/Wakefield/Andover

PostSubject: Re: 305 Oil Leak    Sat Jan 05, 2013 12:21 am

Justin...






























































































have you checked the grounds? Laughing
Back to top Go down
Ironfistdog



Posts : 2124
Join date : 2011-01-11
Age : 35
Location : Warren, MA

PostSubject: Re: 305 Oil Leak    Sat Jan 05, 2013 12:40 am

Razz
Back to top Go down
Cadet57



Posts : 4476
Join date : 2010-03-14
Age : 29
Location : Chicopee, MA

PostSubject: Re: 305 Oil Leak    Sat Jan 05, 2013 4:11 pm

Everyone's a comedian.... Laughing Arrow

Ground are fine! I just replaced them Rolling Eyes
Back to top Go down
95brmw



Posts : 1431
Join date : 2009-11-10
Age : 32
Location : Connecticut

PostSubject: Re: 305 Oil Leak    Sat Jan 05, 2013 8:58 pm

I vote intake manifold. My 91 OCC would rain oil from there until I fixed it.
Back to top Go down
IMPALADAKID
Admin


Posts : 1512
Join date : 2009-01-17
Age : 48

PostSubject: Re: 305 Oil Leak    Sat Jan 05, 2013 9:37 pm

Rear intake gasket. Give the car a reach around. Razz
Reach around behind the intake where it mates to the block and see if it is soaked

_________________
2014 Chevrolet Silverado LTZ Z71 5.3 Aluminum V8 (My daily)
2007 Pontiac G6 VL 2.4 I4 (Wife's Daily)
Back to top Go down
Cadet57



Posts : 4476
Join date : 2010-03-14
Age : 29
Location : Chicopee, MA

PostSubject: Re: 305 Oil Leak    Tue Jan 08, 2013 4:17 pm

Survey says?


Intake manifold!

Stuck my hand behind the motor right between the manifold and the head. Came out with nice fresh oil on it. Just ordered the gaskets. Glad its an easy fix. Arrow
Back to top Go down
1984twodoor



Posts : 4059
Join date : 2010-03-30
Age : 23
Location : Wilmington/Wakefield/Andover

PostSubject: Re: 305 Oil Leak    Tue Jan 08, 2013 11:25 pm

Cadet57 wrote:
Survey says?


Intake manifold!

Stuck my hand behind the motor right between the manifold and the head. Came out with nice fresh oil on it. Just ordered the gaskets. Glad its an easy fix. Arrow

Screw the gaskets. RTV the shit out of the front and back replace the two on the heads.
Back to top Go down
sdstick



Posts : 4278
Join date : 2009-03-20
Location : Revere, MA

PostSubject: Re: 305 Oil Leak    Wed Jan 09, 2013 8:28 am

Cadet57 wrote:
Survey says?


Intake manifold!......... Glad its an easy fix. Arrow

You going to do it?

_________________
Steve


96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
95 Black WB4 Hole...ee...grail
96 Black WB4 No holes in this
95BBB 189K 3.08 Old DD Stolen...by Matt. Cool
Whine..eee...Silver LS6
Back to top Go down
No Moa



Posts : 3871
Join date : 2009-02-21
Age : 44
Location : Midcoast Maine

PostSubject: Re: 305 Oil Leak    Wed Jan 09, 2013 8:29 am

sdstick wrote:
Cadet57 wrote:
Survey says?


Intake manifold!......... Glad its an easy fix. Arrow

You going to do it?

affraid
Back to top Go down
http://www.collectorfbody.com
sdstick



Posts : 4278
Join date : 2009-03-20
Location : Revere, MA

PostSubject: Re: 305 Oil Leak    Wed Jan 09, 2013 8:47 am

No Moa wrote:
sdstick wrote:
Cadet57 wrote:
Survey says?


Intake manifold!......... Glad its an easy fix. Arrow

You going to do it?

affraid

Hey....I didnt say that... Razz

_________________
Steve


96BBB 28K 3.42 Bolt-ons
95BBB 100K 3.73 383 New DD...already broke fixt the 4L60E twice
95 Black WB4 Hole...ee...grail
96 Black WB4 No holes in this
95BBB 189K 3.08 Old DD Stolen...by Matt. Cool
Whine..eee...Silver LS6
Back to top Go down
Fishah



Posts : 1118
Join date : 2009-01-20
Age : 29
Location : Chicago, IL

PostSubject: Re: 305 Oil Leak    Thu Jan 24, 2013 4:17 pm

Cadet57 wrote:
Survey says?


Intake manifold!

Stuck my hand behind the motor right between the manifold and the head. Came out with nice fresh oil on it. Just ordered the gaskets. Glad its an easy fix. Arrow

Who told you it's an easy fix?

Maybe it's an easy fix on an LT1. I happen to know from experience that it's NOT an easy fix on a TBI, especially the first time.

Be prepared for 2-4 hours of gasket scraping, followed by the need to set the intake down perfectly the first time or risk doing it over and over until it's perfect. Ask me how I know....
Back to top Go down
Ironfistdog



Posts : 2124
Join date : 2011-01-11
Age : 35
Location : Warren, MA

PostSubject: Re: 305 Oil Leak    Thu Jan 24, 2013 4:28 pm

Fishah wrote:
Cadet57 wrote:
Survey says?


Intake manifold!

Stuck my hand behind the motor right between the manifold and the head. Came out with nice fresh oil on it. Just ordered the gaskets. Glad its an easy fix. Arrow

Who told you it's an easy fix?

Maybe it's an easy fix on an LT1. I happen to know from experience that it's NOT an easy fix on a TBI, especially the first time.

Be prepared for 2-4 hours of gasket scraping, followed by the need to set the intake down perfectly the first time or risk doing it over and over until it's perfect. Ask me how I know....

How long ago did you do a TBI?? Lol,
It's an easy fix,
Rag placed in the valley and some paper towels stuffed into the water jackets, straight razor scrape the gasket.
The felpro gasket set has little plastic studs that click into the heads to hold the gasket in place, I spray each side with copper gasket
Run a bead of RTV front and back. Remove rag and paper towels, Plop the intake on and torque the bolts back down, hardest part of the whole thing is getting the distributor to engage the oil pump.

I've done a few Razz
Back to top Go down
Fishah



Posts : 1118
Join date : 2009-01-20
Age : 29
Location : Chicago, IL

PostSubject: Re: 305 Oil Leak    Thu Jan 24, 2013 4:38 pm

lol! I did it a few years ago. Obviously different cars will require different amount of time removing the old gasket; mine was a travesty.

Also, the part about plopping the intake down is far easier said than done in my experience. Mess up that bead of RTV and you're gonna leak either coolant or oil.

Getting the Dizzy back in wasn't a big problem, but it is important to get some RTV on that dizzy as well or it will piss oil. Spin it backwards about half a gear so when it drops in it rotates right into position.
Back to top Go down
Cadet57



Posts : 4476
Join date : 2010-03-14
Age : 29
Location : Chicopee, MA

PostSubject: Re: 305 Oil Leak    Thu Jan 24, 2013 5:10 pm

Fishah wrote:


Who told you it's an easy fix?
.

2nd time i've done them. Two hours to do the whole gasket job. 2 more to get the dizzy right. Rolling Eyes

Old gaskets came off in 5 big pieces, it was great.
Back to top Go down
Fishah



Posts : 1118
Join date : 2009-01-20
Age : 29
Location : Chicago, IL

PostSubject: Re: 305 Oil Leak    Thu Jan 24, 2013 5:18 pm

Aparently I am just retarted then lol.
Back to top Go down
Sponsored content




PostSubject: Re: 305 Oil Leak    Today at 3:30 pm

Back to top Go down
 
305 Oil Leak
View previous topic View next topic Back to top 
Page 1 of 1
 Similar topics
-
» FS Grid leak resistors
» WIKKI LEAK OWNER ARRESTED IN LONDON !
» How to wire the MKIII in cathode bias
» Transmission lines
» Trans diptstick leak

Permissions in this forum:You cannot reply to topics in this forum
BADASS of New England :: 91-96 B & D-body tech :: Problems / Maintenance-
Jump to: