Headers and oil leak

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scampbel98
Posts: 304
Joined: Mon Oct 04, 2010 7:45 pm
Your car is a: 1980 Fiat 124 carb
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Headers and oil leak

Post by scampbel98 »

I've run into an issue i've not been able to resolve yet.
Recently rebuilt motor. Running great and just added 4:2:1 headers and now have an oil leak.
There was zero leak before going to headers.
It appears to be from back half of motor on passenger side either at or near the upper stud area.

I've reviewed the threads here and have already tried removing and reinstalling the studs using high temp thread seal. That did not work. I did not try to seal from inside the cam box yet.

It looks like oil may be coming from the cam tower gasket. So I've retorqued those bolts.
Is it common for the cam tower gaskets to leak?

I've used shouldered studs on all the exhaust points and the large washers to try to help spread the load.

Help.. hate an oily engine...
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124JOE
Posts: 3141
Joined: Fri Jun 24, 2011 7:11 pm
Your car is a: 1978 124 fiat spider sport 1800
Location: SO. WI

Re: Headers and oil leak

Post by 124JOE »

yes the cam boxes do leak and retourquing them should help
when you do everything correct people arent sure youve done anything at all (futurama)
ul1joe@yahoo.com 124joe@gmail.com
azygoustoyou

Re: Headers and oil leak

Post by azygoustoyou »

Headers? Huh!
What kind of headers are you having problems with :?:
vandor
Posts: 3996
Joined: Sat May 23, 2009 1:23 pm
Your car is a: 1971 124 Spider
Location: Texas, USA

Re: Headers and oil leak

Post by vandor »

It's common for the cambox gaskets to leak, but not so soon!
If re-torquing does not fix it, then you will have to change the gasket. Be sure both surfaces are flat and clean.
We sell a hi-po cambox gasket that has an impregnated silicone bead, they last longer than the standard ones.
Csaba
'71 124 Spider, much modified
'17 124 Abarth, silver
http://italiancarclub.com/csaba/
Co-owner of the best dang Fiat parts place in town
digitech
Posts: 336
Joined: Sun Jul 19, 2009 6:37 am
Your car is a: 1979 Fiat Spider

Re: Headers and oil leak

Post by digitech »

Just want to chime in on those hi-po gaskets Csaba sells - they are "the Bomb"!! I bought a pair for Jon Logan to use when he re-did my head/camboxes and they work like a charm; I highly recommend them!
spiderrey
Posts: 2623
Joined: Sat Jan 28, 2006 2:08 pm
Your car is a: 70 124 spider-74x19-03 ranger edge
Location: San Dimas, Ca

Re: Headers and oil leak

Post by spiderrey »

I know one of the bolts that hold the header on needs to be sealed. If not it will leak oil.
vandor
Posts: 3996
Joined: Sat May 23, 2009 1:23 pm
Your car is a: 1971 124 Spider
Location: Texas, USA

Re: Headers and oil leak

Post by vandor »

spiderrey wrote:I know one of the bolts that hold the header on needs to be sealed. If not it will leak oil.
It's the #2 and #4 studs.
Csaba
'71 124 Spider, much modified
'17 124 Abarth, silver
http://italiancarclub.com/csaba/
Co-owner of the best dang Fiat parts place in town
Ken

Re: Headers and oil leak

Post by Ken »

After I rebuilt my motor I also noticed an oil leak around the cam box cover, when I was looking at the nut to hold them down and the hole it fit in I found it was bottoming out before the gasket was compressed so I cut about .020 off the shoulder and it seems to be working OK now.
Ken
Ragno124
Posts: 76
Joined: Fri Oct 21, 2011 9:48 am
Your car is a: 1981 124 Spider
Location: Northwest Chicago Suburbs

Re: Headers and oil leak

Post by Ragno124 »

So what do you use to "seal" the studs? I need to do this to stop the oil from dripping onto my exhuast header and smoking out the neighborhood every time I run my car when it's sat for several weeks.
Steve Muzzillo

1981 124 Spider 2000 (ex-turbo)
2006 Acura MDX
2008 Honda CRV
2014 GMC Acadia
2017 Acura RDX
narfire
Posts: 3959
Joined: Sat Dec 27, 2008 2:14 am
Your car is a: 1980 124 spider
Location: Naramata B.C.

Re: Headers and oil leak

Post by narfire »

I used some kind of thred sealer. It came in a small white tube and has worked to date after pulling the top two studs a couple of years ago. Prior to that I had the oil on header issue as well.
Chris
80 FI spider
72 work in progress
2017 Golf R ( APR Stg. 1)
2018 F350 crew long box
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124JOE
Posts: 3141
Joined: Fri Jun 24, 2011 7:11 pm
Your car is a: 1978 124 fiat spider sport 1800
Location: SO. WI

Re: Headers and oil leak

Post by 124JOE »

high temp silicone on the threads
when you do everything correct people arent sure youve done anything at all (futurama)
ul1joe@yahoo.com 124joe@gmail.com
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