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1/24/14 11:44pm - Reply: 'Re: L36 Engine cam replacement'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19448
 Clap  NICE! Keep us updated when ya get it installed, and fired up! Thumbs Up

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Joel Adams
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2/1/14 11:49am - Reply: 'Re: L36 Engine cam replacement'
rep69
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Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130

small set back on the install of engine. I want to put the original shifter back in the car but had to order a mounting plate for the transmission. There are many other things to do, install new vacuum hoses  and replace the power steering ram and control valve and hoses.

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2/1/14 2:13pm - Reply: 'Re: L36 Engine cam replacement'
rep69
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Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130
I am interested in knowing if anyone is using a lead substitute in their fuel tanks.  I know there are probabaly a lot of different ideas on this subject, but I would like to know what people are doing. 
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2/1/14 7:35pm - Reply: 'Re: L36 Engine cam replacement'
F4Gary Gold Member
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.

Joined: 8/26/2006
Posts: 862
rep69 said: I am interested in knowing if anyone is using a lead substitute in their fuel tanks.  I know there are probabaly a lot of different ideas on this subject, but I would like to know what people are doing. 


You don't need lead unless you are operation under a continuous load or high rpm (like a boat or airplane).


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2/1/14 10:44pm - Reply: 'Re: L36 Engine cam replacement'
rep69
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Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130
Thanks for the info..
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2/2/14 2:47am - Reply: 'Re: L36 Engine cam replacement'
HighDesertDave
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Carson City, NV - USA

Vette(s):
Numbers matching 1972 350 4 speed, silver pewter body with blue interior

Joined: 12/4/2013
Posts: 239
I had stainless exhaust valve seats installed in an older V8 I just finished. Your machine shop should have suggested that this would be the appropriate way to run our unleaded fuels with iron heads. The iron valve seats will wear much faster than originally intended with unleaded fuel. The lead acts as a cushion when the valve slams down. It also cools the valve and seat. Its not a lot dough and your good to go for many many miles.

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My Christmas present to ME! Bought Sat 11-30-2013. 72, 350 4 spd, Silver with blue interior...Can't you just hear Pablo Cruz playing in the background?

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2/27/14 12:00pm - Reply: 'Re: L36 Engine cam replacement'
rep69
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Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130
Engine is almost ready to to be started up for the first time. There have been some delays in getting everything put back together. This was my first time dealing with a large project.
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3/6/14 11:31pm - Reply: 'Re: L36 Engine cam replacement'
rep69
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Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130
A small set back today. When we started the engine for the first time, the new rocker arms are hitting the valve covers . Not sure what we are going to do. The car has some aftermarket chrome covers that were installed before I bought the car. Hopefully I can find a fix and then be able to run the engine enough to break in the new cam.
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3/7/14 12:12am - Reply: 'Re: L36 Engine cam replacement'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19448
Did you put roller rockers on it, or are they stock? If they're the stock rockers, there's no reason for them to be hitting on the valve covers...especially if they weren't hitting before, with the same covers. Do the valve covers have the drippers on the inside? Perhaps one or more of the drippers got bent? 

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3/7/14 7:00am - Reply: 'Re: L36 Engine cam replacement'
nosal1 Gold Member
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Dunedin, FL - USA

Vette(s):
1980 Corvette Torch Red with Gold metallic 370HP/350 CU.IN.Turbo 350 w/shift kit.Originally CA.Car with 305 CU.IN.

Joined: 3/21/2006
Posts: 224

Good Morning All, As Mr Adams has stated that if the Roller Rockers are OEM GM rockers,then they should be OK,however if they are aftermarket aluminum and the Valve covers are the normal size,then you will have them banging on the covers.The builder of the engine had not started the engine to notice the "tapping" of the lifters.  Two possible fix's, one is to change to tall valve covers,which they sell on Ebay etc.,and the second way is to buy Fel pro's thick valve cover gaskets (about 7/16" instead of 5/16"),I can not remember the part # and most parts store look at you like you are nuts.

I will try to find the part # for the gaskets later today.
Good luck and all have a great day..        Sal C


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3/7/14 11:44am - Reply: 'Re: L36 Engine cam replacement'
rep69
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Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130
Hey. Thanks for the info. I will check with the machine shop today and talk with my mechanic who installed the engine. They put a comp cam and comp magmum  rocker arms. I will look at the paper work again to confirm.  I do know the machine shop primed the engine before it was installed. Make sure the oil was circulated and checked the oil psi.  On the first start up of the engine after it was installed is when the mechanic heard the tapping.  I will tell him about the different gaskets .  He probably knows.  This all happened last night. 
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3/7/14 12:05pm - Reply: 'Re: L36 Engine cam replacement'
nosal1 Gold Member
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Dunedin, FL - USA

Vette(s):
1980 Corvette Torch Red with Gold metallic 370HP/350 CU.IN.Turbo 350 w/shift kit.Originally CA.Car with 305 CU.IN.

Joined: 3/21/2006
Posts: 224

FYI All      I have used the following valve cover gaskets with success of raising the OEM short valve covers and aftermarket short valve covers to move valve cover up away from aftermarket roller rockers.They are as follows:

                                                      Fel-Pro      #1603 5/16" thick
                                                      PRC  VC 1603        5/16"    "     Procomp
                                                       AFR  1604       do not have thickness

Generally there is no problem with OEM Chevy Roller Rockers






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3/7/14 12:10pm - Reply: 'Re: L36 Engine cam replacement'
nosal1 Gold Member
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Dunedin, FL - USA

Vette(s):
1980 Corvette Torch Red with Gold metallic 370HP/350 CU.IN.Turbo 350 w/shift kit.Originally CA.Car with 305 CU.IN.

Joined: 3/21/2006
Posts: 224

Correction of earlier message measurements should read  

7/32" not 7/16" as the gaskets I am suggesting is Fel Pro and or PRC  VC 1603 both of which are 5/16"...Sal C 



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3/10/14 11:19am - Reply: 'Re: L36 Engine cam replacement'
rep69
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Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130

New gaskets ordered. Hopefully this fixes the problem.  Some minor tuning and tweaking of eveything and I should be good to go. Thanks to eveyone that commented. This was my first time at a major project on the car.

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3/10/14 12:31pm - Reply: 'Re: L36 Engine cam replacement'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19448
 Excellent!
You never really said what Cam you went with, or what type of rocker arms. Just curious....


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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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3/10/14 8:33pm - Reply: 'Re: L36 Engine cam replacement'
rep69
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Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130

A COMP flat tappet cam was installed with COMP magnum tip rocker arms

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3/13/14 8:30pm - Reply: 'Re: L36 Engine cam replacement'
rep69
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Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130

I finally got the info on the parts that were installed. 1 MK1099A engine overhaul kit..040 piston and ring set.  280H comp cam kit Comp magnum roller tip rockers.

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3/28/14 9:42am - Reply: 'Re: L36 Engine cam replacement'
rep69
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Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130
Almost got the car ready to go. New gaskets installed. Engine sounds great. Need to do some small adjustments on the exhaust pipes.  Now that everyhing is back together, the wiper door will not operate properly. When you start the car the door opens slightly and it will not go down.  Trying to trace the system out and find the problem.  
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3/28/14 1:14pm - Reply: 'Re: L36 Engine cam replacement'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19448
That 280 is a nice cam. Thumbs Up
Wiper door popping up like that is usually due to low/no vacuum. Make sure the vacuum is connected properly to the engine source, and that you have the check valve in the line, and facing the correct direction. Single line side to the engine vac source, and on the dual line side, one line to the firewall/interior, and the other goes to the vacuum reservoir/tank, on the driver side fenderwell area.
Also...make sure the over-ride switch and push/pull knobs under the dash are all in the proper position. Thumbs Up


____________________________________
Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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3/28/14 8:17pm - Reply: 'Re: L36 Engine cam replacement'
rep69
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Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130
Thanks for all the info. Yeah, I have a couple of GM mechanics helping me trace out the system. I am not the original owner, and over the years people have bypassed some of the vacuum lines.  Not the simpliest system!! 
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