26
Projects / Re: 1976 CV-19
« on: August 18, 2020, 05:37:10 AM »
Forgot to add the step at the beginning to dimple the block and intake across front and back.
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27
Projects / Re: 1976 CV-19
« on: August 18, 2020, 05:34:41 AM »
Thanks for the replies and recommendations. I was using Permatex Ultra Black RTV. The RTV seems to settle a bit so, in the end, it is making intermittent contact across the front and back of the manifold bottom. I've seen the Permatex Right Stuff recommendation before but did not choose because the package says 1 min tack time. I was thinking this would be too quick since I work slow. I was trying to get everything set while the RTV was still wet.
My approach seems totally wrong. From what I am hearing here I need to let the RTV set up a bit before installing the manifold. Then, only finger tighten for additional cure before torquing down. The concept seems to be to get a compression seal vs. a chemical seel. Have I got this right now?
My process would be:
- Set heat block off plates with some RTV
- Set intake gaskets with RTV both sides around all ports
- Add the Right Stuff 1.5 times higher than my dry fit gap measurements front and back of block and let rack up for an hour
- Install manifold and finger tighten
- Tourque to 25 ft lbs after another hour or over night.
Does this sound correct? Please forgive me as I am new to engine work beyond simple repairs. Thanks again for the guidance.
My approach seems totally wrong. From what I am hearing here I need to let the RTV set up a bit before installing the manifold. Then, only finger tighten for additional cure before torquing down. The concept seems to be to get a compression seal vs. a chemical seel. Have I got this right now?
My process would be:
- Set heat block off plates with some RTV
- Set intake gaskets with RTV both sides around all ports
- Add the Right Stuff 1.5 times higher than my dry fit gap measurements front and back of block and let rack up for an hour
- Install manifold and finger tighten
- Tourque to 25 ft lbs after another hour or over night.
Does this sound correct? Please forgive me as I am new to engine work beyond simple repairs. Thanks again for the guidance.
28
Projects / 1976 CV-19
« on: August 17, 2020, 11:21:28 AM »
Hello Jet Boat Fans,
I am new to the forum. I'm hoping to get some help with my problem child. This boat has been my never ending project. I applied mostly new gel coat (except the deck flake), new wiring, underwater led lights, floor, stringers, reconditioned all aluminum and polished, and started on the interior.
Before I can fix the interior I need to get my mechanicals sorted. The motor is the original 1976 Olds 455-4 Berkeley Pack-a-Jet. I've done a cosmetic restoration on the engine, installed a new Edelbrock Performer intake, Pertronics marine HEI disti, and polished the sand cast Berkeley logs.
My problems with this engine are many. I'll start with intake manifold sealing issues first. I am using Mondello gaskets, heat riser block off plates, Mondello valley tray, and Street Demon 750 carb (converted to marine). My problem is getting the front and back of the block to seal with the manifold. Using these gaskets I am seeing about a 1/4" gap between the top of the front/back of the block and the bottom of the intake. I thought I had a really thick bead of Ultra Black RTV there. At idle it was fine. When I cruised and did a couple 40-50 mph bursts it leaked lots of oil all over the front and back of the motor. I was having this same problem, although not as bad, with the orig intake manifold too. I am not using gaskets at the front/back of the block.
Any tips on a leak free install would be greatly appreciated.
I am new to the forum. I'm hoping to get some help with my problem child. This boat has been my never ending project. I applied mostly new gel coat (except the deck flake), new wiring, underwater led lights, floor, stringers, reconditioned all aluminum and polished, and started on the interior.
Before I can fix the interior I need to get my mechanicals sorted. The motor is the original 1976 Olds 455-4 Berkeley Pack-a-Jet. I've done a cosmetic restoration on the engine, installed a new Edelbrock Performer intake, Pertronics marine HEI disti, and polished the sand cast Berkeley logs.
My problems with this engine are many. I'll start with intake manifold sealing issues first. I am using Mondello gaskets, heat riser block off plates, Mondello valley tray, and Street Demon 750 carb (converted to marine). My problem is getting the front and back of the block to seal with the manifold. Using these gaskets I am seeing about a 1/4" gap between the top of the front/back of the block and the bottom of the intake. I thought I had a really thick bead of Ultra Black RTV there. At idle it was fine. When I cruised and did a couple 40-50 mph bursts it leaked lots of oil all over the front and back of the motor. I was having this same problem, although not as bad, with the orig intake manifold too. I am not using gaskets at the front/back of the block.
Any tips on a leak free install would be greatly appreciated.
Pages: 1 [2]