Pumpkin update
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=12256
Printed Date: September-29-2024 at 3:19pm
Topic: Pumpkin update
Posted By: BuffaloBFN
Subject: Pumpkin update
Date Posted: October-27-2008 at 12:00pm
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The answer to my posts after the rebuild is that the edelbrock intake had a slightly different angle than the original does. I think the way to say it is that the intake faces had a slightly shallower angle in relation to the base...meaning that as the intake is set in place, the top touches first leaving a vacuum leak at the bottom of the ports. I also found out that the PCM intake gaskets are considerably different than the felpro's.
With that part solved, I discovered a knock. This knock was not there through 25-30 hrs of troubleshooting the vac problem. That turned out to be the #4 exhaust lifter wearing badly like it wasn't returning to the bottom on each stroke causing a slap/knock. After several R&R's including changing the lifter, honing its bore, and checking the cam and swapping the cam, I found a valve spring rubbing against its retainer sleeve. So I thought I was going to post yesterday that all was well, but the damn knock is still there. I did pull that head to look for other probs but found none. So how many have done an engine and stringer job in 1 winter and have both come out perfect? LOL I'm batting better than in the majors! 
And Amy says the next penny I spend on it will be on the Boat Dr's plane ticket to Atl?!!? ------------- http://correctcraftfan.com/diaries/details.asp?ID=2331&sort=&pagenum=12&yrstart=1986&yrend=1990" rel="nofollow - 1988 BFN-sold "It's a Livin' Thing...What a Terrible Thing to Lose" ELO |
Replies:
Posted By: eric lavine
Date Posted: October-27-2008 at 12:12pm
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Greg, I have an engine here that the rockers are hitting the larger spring retainers causing awful noises, i need a touch longer pushrods to prevent this ------------- "the things you own will start to own you" |
Posted By: boat dr
Date Posted: October-27-2008 at 1:34pm
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Old Wise One, thank you for the vote .......
As the weather cools off there , Amy and you will come HERE>>>>>>>>>.I have the shop, tools and a lot of Bowtie Guys in my backyard. You need a break, Amy needs a holiday weekend, to get away from Ga.The Boat dr. needs a project to focus on till Woodcock season opens,Dec.18. ------------- boat dr /diaries/details.asp?ID=4631 - 1949 Dart /diaries/details.asp?ID=1533 - 1964 American Skier |
Posted By: 8122pbrainard
Date Posted: October-27-2008 at 2:37pm
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Greg,
Somehow you have to convince Amy that you have SAVED money by doing the engine yourself! All the small bills don't add up to one big one from a engine rebuilder! Now, if you were to fly in Billy, be prepared to stock up on about 20lbs. of coffee - and that's only for a couple days!! ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: BuffaloBFN
Date Posted: October-27-2008 at 7:18pm
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Eric, what did that sound like? I think it's wierd that this problem appeared after it seemed to be fine for some time. I did switch the cams out more than once along with other pieces...who knows? Maybe around february I'll pull it apart again and find the trouble. That won't take long though...I can do it in someone else's sleep now!
Doc, who is this 'old' wise one?!!?
I have to fix my surge brakes and at least 1 bearing before a road trip...you better come see us! LOL Pete, no sweat on the coffee or the expense of the motor. I wouldn't trade what I know now, and we even have Jamaican blue mountain! Besides, we know how to handle folks like doc?!!? LOL ------------- http://correctcraftfan.com/diaries/details.asp?ID=2331&sort=&pagenum=12&yrstart=1986&yrend=1990" rel="nofollow - 1988 BFN-sold "It's a Livin' Thing...What a Terrible Thing to Lose" ELO |
Posted By: nuttyskier2002
Date Posted: October-31-2008 at 4:44am
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Greg, forgive me if I've missed something,....are your valve springs new? Also,...you've installed a different lifter in that bore, right? Who did your heads for you (the machine work). You might have a valve that is sticking in the guide. That normally happens when an engine is overheated but can also happen if you don't have clearance between the valve stem and guide. If you pull the head, remove the spring from the valve associated with the knocking lifter and check how it fits in the guide.
Now here is a possibility.....since your intake was leaking air, it may have caused that valve to get really hot and stick in the guide. Combution temps soar when the mixture leans out. Just some thoughts. I hope you find the problem. Let us know! - Brian ------------- 95 Malibu Echelon w/Mercruiser 350 Magnum Skier Former boats: 88 Ski Centurion Tru Trac II 59 Chris Craft Capri (woody) |
Posted By: eric lavine
Date Posted: October-31-2008 at 10:34am
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it sounded like a bad valve adjustmant, a sticky lifter will sound like a knock ------------- "the things you own will start to own you" |
Posted By: 74SkiNautique
Date Posted: October-31-2008 at 10:02pm
Sometimes when we fire up our SN, and it revs up too about 1300rpm, you can here a lifter make a knocking sound. Goes away in about 3 seconds once oil psi builds. ------------- 74SkiNautique |
eric lavine wrote:Posted By: eric lavine
Date Posted: November-01-2008 at 1:36pm
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pretty much normal, the oil drains back and the pressure of the valve springs will push the oil from the lifter momentarily, the clearances may be opened up a touch from wear. my jeep Cherokee does it everyday and it wakes up the neighbors...nothing in my case that Lucas cant cure... Ive been waiting a year for it to throw a rod out the side. one thing i can say the 4.0 Chrysler's take a licking and keep on ticking. Im on a rigorous oil change schedule between 15,000 and 20,000 I dont let it go much over 20k though lol ------------- "the things you own will start to own you" |