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Username Post: 38 Master Deluxe        (Topic#353282)
JimBove 
Poster
Posts: 4

Reg: 10-03-18
10-03-18 10:35 AM - Post#2747786    

I'm trying to help a freind who is original ownerof a 38 Chevy coupe with the 6. He just finished rebulding the engine, ran it for maybe 2 - 3 minuted and now has milky oil. Short of improper torque on the head or bad headgasket is there any other way water can get into the oil?



 


Tony 
Founder & Grand PoohBah
Posts: 18198
Tony
Age: 62
Loc: Orange County CA.
Reg: 03-15-99
10-03-18 11:28 AM - Post#2747788    
    In response to JimBove

Het Jim, glad you made it over from Facebook. Someone should jump in on this is a bit.

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Keith_Knox 
Moderator and "17th Year" Gold Supporting Member
Posts: 6218
Keith_Knox
Age: 78
Loc: Napa, Ca USA
Reg: 04-02-00
10-03-18 11:51 AM - Post#2747791    
    In response to JimBove

Did they magnaflux the head?

29-41, 42-48, 49-54 Moderator
1948 Chevy Fleetmaster Coupe Purchased 6/2010. Stock with rebuilt 52 216 installed May 1966.
1946 Chevy 1/2 ton pickup, stock. Purchased 11/18/17.
2019 Ford Ranger Lariat Super Crew


 
blue_63 
Contributor
Posts: 386
blue_63
Loc: N Dakota
Reg: 11-06-01
10-03-18 11:56 AM - Post#2747792    
    In response to JimBove

I am not sure about that 6 cylinder engine, but in the motors I know about ( 348-409 ) all the headbolts enter into the waterjacket. When putting these engines together, you need to put a sealer on the threads and let it set up at least overnight. Perhaps that is your problem. Plan on buying a new headgasket.
Greg



 
JimBove 
Poster
Posts: 4

Reg: 10-03-18
10-03-18 04:02 PM - Post#2747803    
    In response to Keith_Knox

They had the head sent out and while one should beable to assume that would be part of the rework I probably shouldn't. I've seen dumber stuff. I should ask...it did come back with valve guides that were too long...



 
JimBove 
Poster
Posts: 4

Reg: 10-03-18
10-03-18 04:03 PM - Post#2747804    
    In response to blue_63

It's worth a look. The book they have only gives disassembly directions not reassembly so it's possible.



 
2blu52 
"18th Year" Silver Supporting Member
Posts: 18995
2blu52
Age: 86
Loc: Montana
Reg: 03-12-02
10-04-18 11:00 AM - Post#2747850    
    In response to JimBove

The oil pipe that supplies the rockers runs through the water jacket. My dads 38 buick suffered a failure in that.

"PEACE IS THAT GLORIUS MOMENT IN HISTORY WHEN EVERY ONE STANDS AROUND RELOADING"

THOMAS JEFFERSON


 
JimBove 
Poster
Posts: 4

Reg: 10-03-18
10-04-18 12:28 PM - Post#2747859    
    In response to 2blu52

Re-ALL

Found this website with answers...though I'm not sure all - http://chevy.oldcarmanualproject.com - It answered the question about head bolt sealent - not needed. Still need to check on the magnaflux but it looks like oil tube is the best bet. There seem to be more than one oil line fittings going through the water jacket that should be tightened before adding coolant plus a somewhat lenghty process of tightening the headbolts and setting valves as you go. I'm sure I'll be busy for a couple of days! Thanks for the help!



 
Keith_Knox 
Moderator and "17th Year" Gold Supporting Member
Posts: 6218
Keith_Knox
Age: 78
Loc: Napa, Ca USA
Reg: 04-02-00
10-04-18 04:44 PM - Post#2747872    
    In response to JimBove

Need to verify the valve to valve guide clearance. The shops that are not familiar with them, set the clearance like the V8's and it is too tight and you can seize a valve.

29-41, 42-48, 49-54 Moderator
1948 Chevy Fleetmaster Coupe Purchased 6/2010. Stock with rebuilt 52 216 installed May 1966.
1946 Chevy 1/2 ton pickup, stock. Purchased 11/18/17.
2019 Ford Ranger Lariat Super Crew


 
38TownSd 
Poster
Posts: 28

Age: 70
Loc: Bracebridge Ontario Canad...
Reg: 04-04-13
11-06-18 07:24 AM - Post#2750593    
    In response to Keith_Knox

The oil pipe that goes through the coolant in the block has higher internal oil pressure than the coolant. However there is a fitting under the side cover where the pipe exits the block. If the fitting is leaking coolant there, it could easily cause the problem.



 


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