SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: sandaddict on September 06, 2016, 02:50:51 PM
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Got a boat with a 455 in it the kid told me it was built a year or so ago but the motor looked like shit. Rust oil etc everywhere. Wife pulled the motor down last night. Bottom end looks good still has cross hatch in cylinders everything looks clean except for carbon on pistons. Heads are a different story. Thick black varnish on the intake side. Looks like a couple of valves weren't seating right. Guess I'll have a valve job done and the head surfaced since it looked like it leaked water out of the side. If I have them surfaced will it affect the valve lash since there not adjustable? They're flat tappet hydraulic. What else do I need to look for on an Olds motor when putting it together? Do they make a 1pc pan gasket?
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Got a boat with a 455 in it the kid told me it was built a year or so ago but the motor looked like shit. Rust oil etc everywhere. Wife pulled the motor down last night. Bottom end looks good still has cross hatch in cylinders everything looks clean except for carbon on pistons. Heads are a different story. Thick black varnish on the intake side. Looks like a couple of valves weren't seating right. Guess I'll have a valve job done and the head surfaced since it looked like it leaked water out of the side. If I have them surfaced will it affect the valve lash since there not adjustable? They're flat tappet hydraulic. What else do I need to look for on an Olds motor when putting it together? Do they make a 1pc pan gasket?
Lee (69kona) to the SCJB courtesy phone please
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No go on the one piece pan gasket, a good machine shop will cut the stems and valves to keep the height correct, as for surfacing the head, it won't really have that much effect unless we're talking a lot of material. You should only be in the .005" range, the lifters will shuck that up.
I do however recommend looking into a set of adjustable rockers.
JMO
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Ok cool. Thanks Glenn. One more thing I forgot to take out and lable the lifters and rolled the motor over to take off the pan. Of course they all fell out. So now I guess I need to put a new set in since I have no idea which hole they fell from. Do I need to re-brake in the cam or will it be ok to drop in new ones and go?
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Ok cool. Thanks Glenn. One more thing I forgot to take out and lable the lifters and rolled the motor over to take off the pan. Of course they all fell out. So now I guess I need to put a new set in since I have no idea which hole they fell from. Do I need to re-brake in the cam or will it be ok to drop in new ones and go?
Well, the correct answer is to throw everything away including the cam. But you might get away with installing new lifters and doing a break in procedure, not sure it's worth the risk vs. the cost of a new lumpy stick. If the cam went flat as result, you could lose everything.
I would pony up for a new cam.
JMHO.
GT
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Ok. Thanks for the info Glenn!
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Lee (69kona) to the SCJB courtesy phone please
I got olds parts for days if u need anything let me know ... Plus I sell my shit cheap to help the Oldsmobile guys out ..
I agree with what Glen said on cam shaft .... Yep no go on one piece pan gasket .... You can ditch the stock rope seal for the main and put a 460
ford lip seal in it.
Sent from my iPhone using SoCal Jet Boats
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Right on Lee thanks. Hey if I have the heads done should I get hardened seats for it?
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Right on Lee thanks. Hey if I have the heads done should I get hardened seats for it?
i am nowhere near an expert but i say yes.
Thought you had to have hardened seats to run unleaded fuel?
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i am nowhere near an expert but i say yes.
Thought you had to have hardened seats to run unleaded fuel?
Everything should have hardened seats in it. Have it checked for sure.
GT
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I have an Olds windage tray with bolts if you want an easy painless way to minimize oil drag on the crank. $40 + the ride. :thumbup:
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I have an Olds windage tray with bolts if you want an easy painless way to minimize oil drag on the crank. $40 + the ride. :thumbup:
Score... :thumbup:
GT
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I have an Olds windage tray with bolts if you want an easy painless way to minimize oil drag on the crank. $40 + the ride. :thumbup:
Sweet! I might hit you up this weekend. Now every time I look for a gasket kit for it they never come with intake gaskets. Why are those separate? Do I have to get a valley pan too? Sorry for all the ignorance buy I've never messed with an Olds.
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Sweet! I might hit you up this weekend. Now every time I look for a gasket kit for it they never come with intake gaskets. Why are those separate? Do I have to get a valley pan too? Sorry for all the ignorance buy I've never messed with an Olds.
The pan is dependent on what intake manifold. Normally no valley pan.
GT