Returning after a long time.

The forum for all of your technical questions on your classic FIAT autos
User avatar
ramzi
Posts: 600
Joined: Sun Jan 24, 2016 9:07 pm
Last Name:
Contact:

Re: Returning after a long time.

Post by ramzi » Fri Feb 02, 2018 9:10 am

Here's a fly in the ointment.

I think that may be a 1756 head you have there. You might want to do some more research before picking up a 1608 head.

What are the numbers stamped (not cast) in the block on near the oil filter housing?
Ramzi
Auto Ricambi, LLC
www.autoricambi.us
1939 Fiat 508CM (Military)
1939 Fiat 508C (Civilian)
1966 Fiat 500F
1967 Fiat 500F
1966 124 Sedan RHD (Oldest in N. America)
1972 124 Spider 2.0L
2017 124 Spider Abarth
2018 Alfa Romeo Stelvio Ti
bnam2
Posts: 51
Joined: Sat Jan 20, 2018 4:34 am
Last Name: Nambisan
First Name: Byas

Re: Returning after a long time.

Post by bnam2 » Fri Feb 02, 2018 9:27 am

Ramzi,
The numbers have been ground down, but we've established that the block is a 1608 (with some comparison by Jim S of the only remaining number left on the block and the remains of some others with know 1608 block he has) about halfway thru this thread. I ran the head number by Guy Croft and like you, he believes it is a 1800 head.

Bringing a head back into India is going to be a bit of a task, but I can do it on a business trip if I have enough time to plan the trip and purchase the head.

I'm hoping it is easier to find a source to sell me just the exhaust cam which the seller can ship if willing or I can have a friend who frequently travels to the US bring back.

The extent of the wear on the #2 lobe surprised me. Does that amount of wear happen frequently?

Byas
Byas
1965 Fiat 1500 Cabriolet with 1600twin-cam
!971 VW 1302LS Convertible in original condition
1965 KG - under restoration
User avatar
ramzi
Posts: 600
Joined: Sun Jan 24, 2016 9:07 pm
Last Name:
Contact:

Re: Returning after a long time.

Post by ramzi » Fri Feb 02, 2018 9:55 am

There literally a dozen independent references to a 4301155 numbered head being from a 1756.... in dozens countries.

If it were me, Id pull the head off the block 1st. Certainly could not do any harm to confirm what you have with a visual inspection.

Just my 2 cents
Ramzi
Auto Ricambi, LLC
www.autoricambi.us
1939 Fiat 508CM (Military)
1939 Fiat 508C (Civilian)
1966 Fiat 500F
1967 Fiat 500F
1966 124 Sedan RHD (Oldest in N. America)
1972 124 Spider 2.0L
2017 124 Spider Abarth
2018 Alfa Romeo Stelvio Ti
bnam2
Posts: 51
Joined: Sat Jan 20, 2018 4:34 am
Last Name: Nambisan
First Name: Byas

Re: Returning after a long time.

Post by bnam2 » Fri Feb 02, 2018 10:11 am

I hear you. Unfortunately, my garage is right now fully occupied by a 65Karmann Ghia that is torn down and being rebuilt. I don't want to pull the head on my driveway and then have the car stuck there because I tore a gasket or seal in the process and those are not readily available here. So, pulling the head will have to wait for a couple of months till the garage frees up. In the meantime, I'd like to source an exhaust cam. Since I have block driven distributor setup with no drive on the exhaust cam, my question is whether a more easily available exhaust cam with disti drive will work in my cam housing.

Byas
Byas
1965 Fiat 1500 Cabriolet with 1600twin-cam
!971 VW 1302LS Convertible in original condition
1965 KG - under restoration
User avatar
ramzi
Posts: 600
Joined: Sun Jan 24, 2016 9:07 pm
Last Name:
Contact:

Re: Returning after a long time.

Post by ramzi » Fri Feb 02, 2018 10:26 am

Yes a "geared" exhaust cam will work in a motor that has a block mounted distributor. Im currently have that configuration in my 2.0L.

You might post something in the "wanted" section of the forum. Im sure someone here has a good cam they would offer up.
Ramzi
Auto Ricambi, LLC
www.autoricambi.us
1939 Fiat 508CM (Military)
1939 Fiat 508C (Civilian)
1966 Fiat 500F
1967 Fiat 500F
1966 124 Sedan RHD (Oldest in N. America)
1972 124 Spider 2.0L
2017 124 Spider Abarth
2018 Alfa Romeo Stelvio Ti
bnam2
Posts: 51
Joined: Sat Jan 20, 2018 4:34 am
Last Name: Nambisan
First Name: Byas

Re: Returning after a long time.

Post by bnam2 » Fri Feb 02, 2018 11:43 am

For engines with block mounted distributors, are the intake and exhaust cams interchangeable (since exhaust does not need the gear in my application)?
Thx
Byas
Byas
1965 Fiat 1500 Cabriolet with 1600twin-cam
!971 VW 1302LS Convertible in original condition
1965 KG - under restoration
User avatar
fastfiat81
Posts: 108
Joined: Tue Aug 30, 2016 12:17 pm
Last Name: Feaster
First Name: Tony

Re: Returning after a long time.

Post by fastfiat81 » Fri Feb 02, 2018 11:49 am

I am sure others will agree that the intake and exhaust cams are interchangeable. I have a set of stock camshafts out of a 2 liter. You can have the intake for the price of shipping if you like.
Tony Feaster
1981 Fiat Spider
1986 Bertone X1/9
2005 Ducati Monster
bnam2
Posts: 51
Joined: Sat Jan 20, 2018 4:34 am
Last Name: Nambisan
First Name: Byas

Re: Returning after a long time.

Post by bnam2 » Fri Feb 02, 2018 7:31 pm

Tony, thank you for that very kind offer!!

Actually, my father-in-law Jerry who lives in Charlotte NC is leaving on the 11th to visit us. He's carrying a few KG parts for me right now. I could get him to carry a cam as well (I'll just have to make it up to him when he's here :)).

Let me pull the cam # on my current cam and see if I can find the specs. If the specs of the one you have are close/compatible, I'll PM you and take you up on the offer.

Really appreciate it!

Byas
Byas
1965 Fiat 1500 Cabriolet with 1600twin-cam
!971 VW 1302LS Convertible in original condition
1965 KG - under restoration
fp55scca
duemila club
Posts: 2184
Joined: Sun Jan 24, 2016 11:34 am
Last Name:

Re: Returning after a long time.

Post by fp55scca » Fri Feb 02, 2018 8:36 pm

--Byas, the usual causes for cam wear are either oil issues or valve adjustment. From your pics of the exhaust cam, neither of the two lobes visible (#1 and #2) looks very good. In light of this, I would also be very suspect of the intake cam as well.

--While cams are interchangeable, between intake and exhaust, and between engines series, ie. 1608 cams into an 1800 motor and so forth, I would suggest that you replace you cams as a "set". Generally, if you are going to have a single, higher performance cam, you would put this cam in the intake side. Without going into the OE cam specs of the various motors, you would be best served to just replace the cams as a set from the same motor series.

--Also, I agree that you need to check your cam wheels as well. If the engine is in fact at TDC and the cams properly timed, the pointers on your camboxes should be pointing to holes drilled in the cams where you have white marks? Check it out.

--If your father in law is in Charlotte NC, I would suggest that he contact John Baucom at Baucom Motorsports, also know as Sportscar Authority, in Matthews, NC for the cams. Matthews NC is on the outskirts of Charlotte, just to the south-east. There is no greater authority in the US concerning the Fiat/Lancia twin cam, and I'm sure they have the spares that you need.
Jim Scurria
Norfolk, VA

1972 Fiat 124 Spider
1971 Spider - SCCA FP-24
1974 Fiat 124 Spider
bnam2
Posts: 51
Joined: Sat Jan 20, 2018 4:34 am
Last Name: Nambisan
First Name: Byas

Re: Returning after a long time.

Post by bnam2 » Fri Feb 02, 2018 9:51 pm

Here're some pics of the Intake. They seem to look ok, but a seasoned eye may note stuff 've missed.
IMG_8096.JPG
IMG_8096.JPG (1.97 MiB) Viewed 494 times
IMG_8097.JPG
IMG_8097.JPG (2.49 MiB) Viewed 494 times
IMG_8095.JPG
IMG_8095.JPG (2.41 MiB) Viewed 494 times
IMG_8098.JPG
IMG_8098.JPG (2.61 MiB) Viewed 494 times
The casting numbers...
IMG_8101.JPG
IMG_8101.JPG (1.55 MiB) Viewed 494 times
IMG_8102.JPG
IMG_8102.JPG (1.92 MiB) Viewed 494 times
Byas
Byas
1965 Fiat 1500 Cabriolet with 1600twin-cam
!971 VW 1302LS Convertible in original condition
1965 KG - under restoration
Post Reply

Who is online

Users browsing this forum: No registered users and 3 guests