update: crowbar engine rebuild

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Re: update: how long of a crowbar should be used

Post by big3country8 » Wed Feb 27, 2013 7:13 am

I do believe I would tell the Texans to go by what Waterthunder had to say. May not always be what you wanna hear but I assure you he knows what he's talking about. My 418 ls3 sounds like a stock caddy idling but will rip a 4 blade R like its not there. And for the good gas comment I run 11.5-1 and she loves some 93.
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Re: update: how long of a crowbar should be used

Post by Rich Andrews » Wed Feb 27, 2013 8:19 am

that
s a good one right there..i'd be a little worried if i saw some guy jacking my lifterbore like that. If they're changing the cam and your lifter is that stuck,something ain't right.
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Re: update: how long of a crowbar should be used

Post by flying fish » Wed Feb 27, 2013 8:58 am

mcm4

Actually, you did not say whether the lifter bores were tight. Way too tight due to having a clearance issue???

The other possibility is....... the lifters were hitting the bottom of the head when trying to remove the lifters and the bar was being used for persuasion.

It is sad that you can't post a virtual picture of yoUR engine, and us key board mechanics could just fix her. :)

I hope your liFter bores are ok and the lifters were bumping the bottom of the head when trying to remove lifters with head still installed.
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mcm4
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Re: update: how long of a crowbar should be used

Post by mcm4 » Wed Feb 27, 2013 10:01 am

Unfortunately they were very tight in the bore and slightly gaulded. Engine has to be torn down and lifter bores honed or sleeved.

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Re: update: how long of a crowbar should be used

Post by Rich Andrews » Wed Feb 27, 2013 11:38 am

bet that cam was wrong..rolled the edges of them lifters
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Re: update: how long of a crowbar should be used

Post by muffled500hp » Wed Feb 27, 2013 12:58 pm

Yeah, you gotta hone those lifter bores in those new blocks to match the lifters you are using. The lifter companies can have up to a couple thousandths variance from one brand to another in OD size.
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Re: update: how long of a crowbar should be used

Post by flying fish » Wed Feb 27, 2013 4:35 pm

muffled500hp wrote:Yeah, you gotta hone those lifter bores in those new blocks to match the lifters you are using. The lifter companies can have up to a couple thousandths variance from one brand to another in OD size.
Sure can makes those "Airboat Specific" engines with warranty look good. :)
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Re: update: how long of a crowbar should be used

Post by cntry141iq » Wed Feb 27, 2013 9:13 pm

well you would think any decent engine builder would know that .. if it is the normal these days .. I probably would lose my people skills
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Re: update: how long of a crowbar should be used

Post by muffled500hp » Wed Feb 27, 2013 9:22 pm

cntry141iq wrote:well you would think any decent engine builder would know that .. if it is the normal these days .. I probably would lose my people skills
If you haven't done it before you wouldn't know, the engine block company don't send much for instructions. :lol:
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Re: update: how long of a crowbar should be used

Post by cntry141iq » Wed Feb 27, 2013 9:26 pm

thats why I said engine builder .. rather than an assembler .. LOL a good one checks clearances everywhere .. don't take long and sure can save a ton of grief .. but I still got my people skills .. it wasn't mine LOL
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Re: update: how long of a crowbar should be used

Post by mcm4 » Wed Feb 27, 2013 11:20 pm

I picked up the lifters today, six of the eight sets were pretty badly gaulded, engine builder said it appeared measurements and honing were not sufficient when the engine was originally put together (about five hours total run time). And the cylinders were way out of tolerance and I would need to install 40 over pistons after corrective boring.

No oiling related damage observed in engine.
IMG_5513.jpeg
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PAINKILLER
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Re: update: how long of a crowbar should be used

Post by PAINKILLER » Wed Feb 27, 2013 11:46 pm

just my advice when i order lifters i measure the lifter bore with a caliper an if they need brass sleeves they get them ( on a used block )or you can tell who ever you order them from what brand block if its a after market they should give you the right size lifters for that block an you almost always have to hone to the right size(lifter bore) i would install the sleeves anyway saves the block
Last edited by PAINKILLER on Thu Feb 28, 2013 9:52 pm, edited 1 time in total.
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Re: update: how long of a crowbar should be used

Post by jopete » Thu Feb 28, 2013 7:40 am

u got insurance on that boat? might want to sink it and start over, because even if you get it to run right you will never have any confidence in it.
Hate to see you having problems.

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Re: update: how long of a crowbar should be used

Post by dblj006 » Thu Feb 28, 2013 8:00 am

I'll give it to you man, you seem to be handling this well. I would be pissed. Good luck.
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Re: update: how long of a crowbar should be used

Post by mcm4 » Thu Feb 28, 2013 8:36 am

I have heard that just before daylight it is the very darkest

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Re: update: how long of a crowbar should be used

Post by HuntingBigun » Thu Feb 28, 2013 8:54 am

mcm4 wrote:I picked up the lifters today, six of the eight sets were pretty badly gaulded, engine builder said it appeared measurements and honing were not sufficient when the engine was originally put together (about five hours total run time). And the cylinders were way out of tolerance and I would need to install 40 over pistons after corrective boring.

No oiling related damage observed in engine.
IMG_5513.jpeg
IMG_5512.jpeg

What is the original engine builder saying, dang bro sounds like all you got is a mess, you paid X for a engine that produced Y hsp X trq, you did not get it, the work they preformed is not looking very good, now you got to go .040 over WTF that brings thin walls and heat problems into the game.
I stop and get my money back or see them in court throwing good money after bad JMO, sorry for your troubles :roll: :roll: :roll: you going to have more money in that engine then you could have bought a couple differant engines packages from airboat specfic builders. Sucks for sure
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Re: update: how long of a crowbar should be used

Post by Waterthunder » Thu Feb 28, 2013 9:26 am

Man I feel your pain. I would recommend measure the OD of the lifter above the oil hole where there is no wear present and compare it to the lifters that show no wear. My guess they will be the same and the tolerance issue will be in the blocks lifter bores. I joke when customers get pissed because I line hone their bran new 5k race block. They always say their block was bran new it didn't need anything. I look at them and say just because it's a bran new aftermarket race block doesn't mean it right. Just work with your engine builder I'm sure their good guy's and want to make it all right for your.
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Re: update: how long of a crowbar should be used

Post by gblack15 » Thu Feb 28, 2013 10:23 am

MCM4,

Just curious is the manufacturer cover the cost of these repairs?

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Re: update: how long of a crowbar should be used

Post by Nobody » Thu Feb 28, 2013 6:55 pm

Check to see if they installed Restrictors for the lifter galley.
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Re: update: crowbar engine rebuild

Post by mcm4 » Thu Mar 14, 2013 6:39 pm

I just got back from the engine rebuild shop. The original lifters were gauled and the original cylinders had too much clearance for the pistons.

The graph I included shows the original pull, then we adjusted the roller rockers and did another pull and got improvement, then we discovered the lifter issue and rebuilt the engine that only had 4 hours or so on it, the final pull was with the new engine, with new cam, rebuilt by a different shop...

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Re: update: crowbar engine rebuild

Post by mcm4 » Thu Mar 14, 2013 6:41 pm

Forgot to add chart
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cntry141iq
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Re: update: crowbar engine rebuild

Post by cntry141iq » Thu Mar 14, 2013 6:51 pm

well looks great on paper for sure what was that again a 283 or a 327 ?? LOL
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skinny99
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Re: update: crowbar engine rebuild

Post by skinny99 » Thu Mar 14, 2013 9:48 pm

It's gonna be like a whole new boat.
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Re: update: crowbar engine rebuild

Post by flying fish » Fri Mar 15, 2013 3:24 pm

AR torque looks real promising.
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Re: update: crowbar engine rebuild

Post by flying fish » Mon Apr 01, 2013 5:09 pm

bump
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