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4.3 Reman done

sharkin95

sharkin95

Regular Contributor
Well just finished her up bought a remanufactered block with new vortec heads,& used alum oil pan and get this off E-bay . Installed new plastic timing cover, new melling oil pump hv, new 8 bolt manifold,reman weber carb started her up (fingers crossed) WOW running at 18-19 hg 60-70 psi oil pressure, no water and no oil leaks,purring like a kitten @650 rpm in gear.used my exhaust manifolds, risers,flywheel,coupler,etc...mr 43t plugs. asked A lot of questions on this sight and got some great answers but also some maniac answers like a heavy duty melling pump will drain your oil pan, and the other one was I bought a 96-99 block and my parts were from a 1995 so the timing cover is plastic and there is no timing tab on the newer engines but there is a notch that gives you TDC this guy told me to sell the engine and start over and buy a 1995 with a metal timing cover. all in all a great sight to get info just watch out for MANIACS......Thanks especially to Ricardo Marine.
 
There is an excellent article on melling high vol pumps myths and fables. I have it but I don't know how to download it to this sight....
 
why mr43t or mr43lts are the manufacture plugs to use from 1992-1997 , I could use ngk br6fs but at $3.25 a plug they are pricey since I change mine every season....hey great quote Let The Insanity Begin....LOL
 
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The heads are vortec #12556140 the lts and bpr6efs are the longer tip so you have to make sure that the piston doesn't hit the plug tip.. yep got it.... I probably could use them because they came out in 1998 for 4.3 engines. My reman engine #14099 090 and heads was originally set up for a 96-99 4.3. I figured I'm safe with the mr 43t at the end of the season I'll see how they burn.thanks
 
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sharkin95 said:
Well just finished her up bought a remanufactered block with new vortec heads,& used alum oil pan and get this off E-bay . Installed new plastic timing cover, new melling oil pump hv, new 8 bolt manifold,reman weber carb started her up (fingers crossed) WOW running at 18-19 hg 60-70 psi oil pressure, no water and no oil leaks,purring like a kitten @650 rpm in gear.used my exhaust manifolds, risers,flywheel,coupler,etc...mr 43t plugs. asked A lot of questions on this sight and got some great answers but also some maniac answers like a heavy duty melling pump will drain your oil pan, and the other one was I bought a 96-99 block and my parts were from a 1995 so the timing cover is plastic and there is no timing tab on the newer engines but there is a notch that gives you TDC this guy told me to sell the engine and start over and buy a 1995 with a metal timing cover. all in all a great sight to get info just watch out for MANIACS......Thanks especially to Ricardo Marine.
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Ayuh,.... Bein' a Maineiac in exile, I take offence to yer comment, especially, considerin' I don't believe I ever said such a thing...
Even though a HV-oil pump is Unneeded, 'n usually Unwanted, in a marine motor...

sharkin95 said:
The heads are vortec #12556140 the lts and bpr6efs are the longer tip so you have to make sure that the piston doesn't hit the plug tip.. yep got it.... I probably could use them because they came out in 1998 for 4.3 engines. My reman engine #14099 090 and heads was originally set up for a 96-99 4.3. I figured I'm safe with the mr 43t at the end of the season I'll see how they burn.thanks
Click to expand...

Ayuh,... The '96, 'n Up, Fast-burn, Vortec heads NEED the extra 1/8th"....

The Pre-'96, Non-Vortec heads use the MR43T plugs...
 
Ayuh.. if the shoe fits wear it....never gave names ..if you like I can e-mail the article on Melling Myths and Fables. I think I read one your post that says mr 43T will work fine on an engine with vortec heads and you only use AC plugs. At the end of the season I'll see how they burn... Your Quote The plugs will tell the story...
 
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sharkin95 said:
Ayuh.. if the shoe fits wear it....never gave names ..if you like I can e-mail the article on Melling Myths and Fables. I think I read one your post that says mr 43T will work fine on an engine with vortec heads and you only use AC plugs. At the end of the season I'll see how they burn... Your Quote The plugs will tell the story...
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Ayuh,... While I do only use ACs in my Chevy motors,...

I doubt I ever recommended usin' MR43Ts in Vortec heads....
or maybe I mis-spoke,... Donno....

Just to be safe, I'll just not answer any more of yer questions,...
Seein's you don't like My answers, 'n ya already know it all, anyways...
 
Yuuup to the 10th post. But i want to get this clear in my mind. Some one is looking for FREE advice, post on a site and then doesn't like the reply's.
I too only use ac's in a gm engine.
What rock are all these ungrateful people crawling out from under, located at ?
For all i care you can run with 300 pounds of oil pressure.
 
hey you spelled maniac wrong LOL.....I have been reading your posts for a while even when you were posting in boatfix and sterdrives.com It seems you have forgotton that sometimes you should look at the obvious things before you start tearing things a part.there was post from a guy in Australia who had what he thought was a carburetor problem and you and the CREW had this guy tearing his carb a part almosting telling him to buy a new carburetor when it was just BAD GAS. You have 5 of those little wrenchs so people trust that the term break out another thousand should not be your motto...just my 2 cents...<<<<<<ELVIS HAS LEFT THE BUILDING>>>>>
 
sharkin95 said:
hey you spelled maniac wrong LOL.....I have been reading your posts for a while even when you were posting in boatfix and sterdrives.com It seems you have forgotton that sometimes you should look at the obvious things before you start tearing things a part.there was post from a guy in Australia who had what he thought was a carburetor problem and you and the CREW had this guy tearing his carb a part almosting telling him to buy a new carburetor when it was just BAD GAS. You have 5 of those little wrenchs so people trust that the term break out another thousand should not be your motto...just my 2 cents...<<<<<<ELVIS HAS LEFT THE BUILDING>>>>>
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Nope,... No, I did No such thing,....

The connotation of the word is different, hence the different spellin'....
My spellin' is the same as used in their motto, by the Army Air National Guard, of Maine....

Most, but probably not all of any Bad info givin' by me, is from Bad info for a poster, that has No clue as to what their doin', nor workin' on...
 
Here are the pros and cons ...I have a frankenstein engine a 4.3 reman gmc 1996-99 block with vortec heads bored .030 over,thunderbolt 4 ignition not 5 , 8 deg btdc not 10,ac mr43T gapped at .035 weber stock carb, temp stays at 150-155 deg, oil press at 60-70 psi with a 155hv pump so it reaches that last bearing allllll the way in the back, sounds awesome, idles at 650 rpms, plenty of power or do you change the plugs to mr43lts and hope that the piston doesn't hit the plug or runs too hot or stay with the mr43t and check them for carbon fouling in a month or so.hmmmmmm I don't know what to do MOM.
 
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Bond-o you gave birth to this guy ? Should have drowned him when you had the chance. At least he didn't go over the .030 i'll give him that at least.

" Stock weber " on that engine ? It came with that carb. from the factory ????

You stayed with the thunderbolt system, i have no idea why.

I would have went with a one wire in and one wire out, all in one unit hei with the coil all one piece. One wire to the tach.

I'm actually starting to like this guy. He stands his ground. But maybe a little respect should be shown.
 
Correction: remanufactured Weber Carb, I used my thunderbolt 4 because the delco hei or the thunder 5 is $225.00 bucks some sanity has to kick in. I can't swim :cool: GLUB GLUB

I'll have extra butter on mine.
 
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sharkin95 said:
Here are the pros and cons ...I have a frankenstein engine a 4.3 reman gmc 1996-99 block with vortec heads bored .030 over,thunderbolt 4 ignition not 5 , 8 deg btdc not 10,ac mr43T gapped at .035 weber stock carb, temp stays at 150-155 deg, oil press at 60-70 psi with a 155hv pump so it reaches that last bearing allllll the way in the back, sounds awesome, idles at 650 rpms, plenty of power or do you change the plugs to mr43lts and hope that the piston doesn't hit the plug or runs too hot or stay with the mr43t and check them for carbon fouling in a month or so.hmmmmmm I don't know what to do MOM.
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Ayuh,.... For the sake of conversation,...
It's the Front bearings, 'n actually the lifters, 'n top end that get their oil, Last...

The Rear main bearing, Waayyy in the Back,... Get's it's oil, 1st...
The oil pump is bolted right to it....

'n as for the sparkplugs,... If you've actually got Vortecs, fast-burn heads,...
The sparkplug hole through the head is Longer,...
The shorter sparkplugs are shrouded...

That's Why, they came out with the longer reach plugs...

No chance of wackin' a piston,... None,... 0,... Zero....

'course, ya probably didn't have the block decked to 0.00", 'n use a .043" head gasket to get the proper quench either....

My 4.3l has the Merc/ Weber/ Edlebrock Carter AFB clone carb as well,... I Love it...
Great carb, 'n super Easy to tune with the street/ strip kit...

I've had No problems, 'n have seen No reasons to worry 'bout up-gradin' the T-Bolt IV either,...
It's 'bout the Best marine ignition out there...
Super simple, 'n Super reliable...
 
You are correct Bondo, I had a picture in my head that the front was farthest away.I installed the oil pump upside down on a motor stand. Heads were already installed when I bought it, the head gaskets looked like stainless steel from what I could see. I'm not saying anyone is wrong about the mr 43 lts but who is to say that the rebuilt engine I bought is dead on or the heads I just didn't want to take a chance and dinger the pistons. I will post back in a month and send a pic on the mr 43t. Oh and I do have a retraction on my statement about somebody on this forum stating to buy a new engine because the timing cover was plastic and didn't have a timing tab. ( it was on iboats.com (commander achris). Thanks to all for the H.E.L.P.:eek:
 
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Well after 100 hours on my engine I'm reposting with an update in regards to the Melling HV oil pump, the oil press.runs at about 70 psi drops to about 40-50psi on a hard run no draining of oil in the the oil pan, no foaming,no power loss. The other update was on the correct spark plugs... I stand corrected on the correct plugs to use the MR43lts are correct. I took out the MR 43lt because the engine wasn't reaching max rpms (4200 rpms) with the MR43lts with extended tip I got 4800 rpms. I reset the timing to 10 btdc total advance is 24@ 2500 rpms. Did some carburetor work on the Weber 4 barrel like changing the rods and springs at presently with a 14 1/2 x 19 prop I get 6.3 -6.5 gals per hr at 3400 rpms @ 21mph.:)
 
You could have possibly stuck a small tape (metal roll type with the catch on the end) in the spark plug hole, and measured the thread length Then you would have known it took MR43LTS plugs, which I would have suggested as well. As far as the melling pump, I think they're amazing after using one on a previous rebuild.

By the way, MR43 series plugs are alloy, and will never rust, plus they have the largest center electrode of any plug I've ever seen, possibly for delivering stronger spark.
 
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sharkin95 said:
Well after 100 hours on my engine I'm reposting with an update in regards to the Melling HV oil pump, the oil press.runs at about 70 psi drops to about 40-50psi on a hard run no draining of oil in the the oil pan, no foaming,no power loss. The other update was on the correct spark plugs... I stand corrected on the correct plugs to use the MR43lts are correct. I took out the MR 43lt because the engine wasn't reaching max rpms (4200 rpms) with the MR43lts with extended tip I got 4800 rpms. I reset the timing to 10 btdc total advance is 24@ 2500 rpms. Did some carburetor work on the Weber 4 barrel like changing the rods and springs at presently with a 14 1/2 x 19 prop I get 6.3 -6.5 gals per hr at 3400 rpms @ 21mph.:)
Click to expand...

Ayuh,.... Glad to hear yer gettin' 'er dialed in,..... ;)
 
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