Past oil leak - ZR-1 Net Registry Forums

jrd1990zr1 · 03-09-2010

Question for you experienced ZR1 folks. When I pulled the injectors, alternator, coil and starter I noticed quite a bit of dryed up oil all over the place. Don't pay attention to the starter area I was starting to clean there. Anyway the area where I have drawn the red arrow to, is this a cover with a gasket? Could this be the source of the past leak? What is under this if it is removable?

I plan to pull the injector housings and replace the oil cooler lines with a set of Jeffvette's and clean up the entire area before I put it together, since I don't see any fresh oil.

Thoughts? Thanks, John

1990 415 · 03-16-2010

This would be the ideal time to pull those cam covers and have the top end powder coated.

GOLDCYLON · 03-16-2010

Suggest replacing the baffle hoses as well.

jrd1990zr1 · 03-16-2010

Quote:

Originally Posted by GOLDCYLON

Suggest replacing the baffle hoses as well.

Any thoughts on where I can find radiator and baffle hoses for my car?

Looks like the only choice is Samco?? or is there other sources?

Thanks, John

phrogs · 03-09-2010

I bet you a dollar there are loose bolts on that crankcase vent cover thats what your pointing at, Get a gasket for it and clean up your oil mess.

Its normal all of mine have been like that.

when you remove it you will see a baffle and below that is the crankshaft

johnny

jrd1990zr1 · 03-10-2010

Thanks guys. Looks like another gasket order is going in to Jerry. That's a good question about the baffle, I'll check that when I pull the cover.

Are all the torque settings in the back of the Helms manual? Wondering about the baffle. Or should I look at the rebuild section?

Thanks again for the advice.

John

Dynomite · 03-10-2010

Quote:

Originally Posted by jrd1990zr1

Thanks guys. Looks like another gasket order is going in to Jerry. That's a good question about the baffle, I'll check that when I pull the cover.

Are all the torque settings in the back of the Helms manual? Wondering about the baffle. Or should I look at the rebuild section?

Thanks again for the advice.

John

Let me know if those baffle bolts were tight

The torque on both the baffle bolts and cylinder ventilation cover bolts is 89 in-lbs. I always go a bit less torque. I use red loctite 262 on anything I do not plan on removing for some time.....maybe blue loctite 242 on plenum and anything I might remove more often.

I use the 1990-1993 Corvette, RPO LT5 Service Manual Supplement for all my torque information (Ebay)

jrd1990zr1 · 03-10-2010

I won't know to early next week. I want to clean up the area before I pull that cover. It looks like I can leave the secondary control rails in place rather than pull them off.

I've got the Helms manual fo my Z. Never had to pull the engine apart so I had not looked for torque settings.

I'll let you know about the baffle.

Thanks, John

03-11-2010

Quote:

Originally Posted by jrd1990zr1

I won't know to early next week. I want to clean up the area before I pull that cover. It looks like I can leave the secondary control rails in place rather than pull them off.

I've got the Helms manual fo my Z. Never had to pull the engine apart so I had not looked for torque settings.

I'll let you know about the baffle.

Thanks, John

John, your life will be made easier pulling the rail protectors off and the rails themselves. Leave the breather box installed and scrub the hell out of the area with a brush and some brake kleen letting it all run down the drain tube. Then after everything is dried replace the gasket.

The torque is 89 in lbs.

jrd1990zr1 · 03-24-2010

Quote:

Originally Posted by Dynomite

Let me know if those baffle bolts were tight

The torque on both the baffle bolts and cylinder ventilation cover bolts is 89 in-lbs. I always go a bit less torque. I use red loctite 262 on anything I do not plan on removing for some time.....maybe blue loctite 242 on plenum and anything I might remove more often.

I use the 1990-1993 Corvette, RPO LT5 Service Manual Supplement for all my torque information (Ebay)

There are 13 bolts in the crankcase cover. 5 were barely finger tight, one was actually loose a turn or two. Baffle bolts were tight. I was thinking I would leave them alone.

Besides this cover leaking my biggest leak seems to be from the two lower bolts on the oil filter adapter those were only finger tight.

Going to finish cleanup tonight, start reassembly tomorrow night.

Thanks for all the advice, John

03-16-2010	#2
1990 415 Join Date: Feb 2009 Location: Canada Posts: 309	Re: Past oil leak This would be the ideal time to pull those cam covers and have the top end powder coated.

03-16-2010	#3
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,120	Re: Past oil leak Suggest replacing the baffle hoses as well. __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

03-09-2010	#5
phrogs Join Date: Jul 2004 Location: Kalamazoo MI Posts: 1,755	Re: Past oil leak I bet you a dollar there are loose bolts on that crankcase vent cover thats what your pointing at, Get a gasket for it and clean up your oil mess. Its normal all of mine have been like that. when you remove it you will see a baffle and below that is the crankshaft johnny __________________ JOHNNY P Currently own 90 ZR-1 #845 DRM 500 engine package 90 #226 Parts car Hit me up if you need anything. Last edited by phrogs; 03-09-2010 at 11:13 PM.

03-10-2010	#6
jrd1990zr1 Join Date: Dec 2005 Location: Delanson, NY Posts: 925	Re: Past oil leak Thanks guys. Looks like another gasket order is going in to Jerry. That's a good question about the baffle, I'll check that when I pull the cover. Are all the torque settings in the back of the Helms manual? Wondering about the baffle. Or should I look at the rebuild section? Thanks again for the advice. John

03-10-2010	#8
jrd1990zr1 Join Date: Dec 2005 Location: Delanson, NY Posts: 925	Re: Past oil leak I won't know to early next week. I want to clean up the area before I pull that cover. It looks like I can leave the secondary control rails in place rather than pull them off. I've got the Helms manual fo my Z. Never had to pull the engine apart so I had not looked for torque settings. I'll let you know about the baffle. Thanks, John

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