140 looper 1988 rebuild??

reeldutch

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can i use the block from a 1987 v4 looper 140
ant use all the other parts from a 88 140 looper?

i know the 88 has a bigger bore.
all the other parts should be the same???? i think.
can i use the heads from the 88 on the 87 block?
 

reeldutch

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Re: 140 looper 1988 rebuild??

the 87 block is .044 over on all 4.
so if i order those pistons i should be fine?
 

Dhadley

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Re: 140 looper 1988 rebuild??

Here's a secret -- don't tell anyone.

Take the 87 block (small bore that's .044 over) and bore it to 3.685". Now you have a big bore V4 looper. And standard bore to boot.
 

reeldutch

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Re: 140 looper 1988 rebuild??

i will get the block monday i thought it was possible

thanks dhadley

just want to make shure.

all the other parts will fit right????
 

reeldutch

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Re: 140 looper 1988 rebuild??

if i bore the 87 block to 3,685 so it wil be standard like the 88 block,
i asume i dont have to rejet the carbs from the 88?
and the port timing is the same?
so i can stay exactly the same as the 88 is?
i will use all the 88 ignition parts.
88 carbs.

thanks reeldutch
 

Dhadley

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Re: 140 looper 1988 rebuild??

Yep, everything will work from the 88 V4.

The only thing to watch is the ports. Measure the port heights now for each port. After you bore it to 3.685" recheck the heights. If they are lower than original then cut the top of the port window to raise it back to the spec. Some of the sleeves had the ports cut on an angle so when you bore it the port will actually come out lower.

The heights on the original ports will probably not be all exactly alike. If you have to recut the ports, use the highest spec for each of the respective heights (highest exhaust and highest intake).
 

reeldutch

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Re: 140 looper 1988 rebuild??

Thanks for the great information makes all sence to me.

the guy who owns the repairshop/marina wants $ 450 for the block. a mechanic who works there told me its laying on the shelf taking up space for over 10 years.
i offered him 300 and he refused.
is it worth more?
i can reuse the pistons and rering them from the 88.
so i would save money there.
to buy a other block for 200 rebore and 4 new pistons would cost me about 750.
 

Dhadley

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Re: 140 looper 1988 rebuild??

450 seems a bit high. For that price is it bored to 3.685 and cleaned?
 

Dhadley

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Re: 140 looper 1988 rebuild??

I have another thought -- dhadley50@aol.com

Just a passing thought, it may help. Shoot me an email (even if it's blank) with "V4 Looper" in the subject line so I know it's you.
 

iwombat

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Re: 140 looper 1988 rebuild??

gah! That kind of stuff drives me up the wall sometimes. Dealers (and this isn't just for boats, mind you) get so caught up on what list is they forget what the actual value might be. There's a reason that thing has been sitting on the shelf for 10 years for that price - it's not worth that much to anyone.

<Insert even frothier rant here>
 

reeldutch

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Re: 140 looper 1988 rebuild??

iwombat i cant agree more with you,

whats the chanse that his mechanic will rebuild a 1988 motor.
thats 0.0

and he figgured i kneed the block so he just asks a huge amount for it.
i negosiated a little more with him and i bought it for 350.
i still payed to much but the block seems in good shape.
the mechanic told me he saved this block because the motor went bad after only a few years of service. so its in good shape.
i do have to rebore it thats another 150.

and still counting till its done.
 

Walker

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Jun 15, 2002
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Re: 140 looper 1988 rebuild??

Doesn't sound to out of reason to me. Price a new block.
 

iwombat

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Re: 140 looper 1988 rebuild??

One of the brit bike dealers I used to buy from had an inventory of roughly 300+ used gas tanks. He wanted something like $750-$1500 for each one.

At the time, the going rate was about $200-$400 for repair & repaint depending on the price and materials of the detailing.

There they sat until he eventually retired and sold the inventory for pennies on the dollar.
 

kenmyfam

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Re: 140 looper 1988 rebuild??

Greed outweighs reality for some people !!!
 

iwombat

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Re: 140 looper 1988 rebuild??

Well see, that's what they "listed" for. Nevermind that the market wouldn't support the list.
 

rodbolt

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Sep 1, 2003
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Re: 140 looper 1988 rebuild??

I have an 85 looper block assy thats going to the scrap pile. it sucked a reed box screw some years back and needs 1 sleeve.
its still assembled minus the heads, they are about someplace.
I imagine its rusting as its been in the shed outback for about 6 years now.
but by febuary it will be in a dumpster somewhere.
 

reeldutch

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Re: 140 looper 1988 rebuild??

i can shoot myself,

spoke to the guy at the machine shop today, and he told me i should not have bought that block because he has a 88 block that only needs one cylinder bored .020 over and the others are only honing.
he wanted 200 for it bored and honed. he does good work i always go to him for boring blocks.

he would charge me 40 per cylinder to rebore the 87 small bore and he said that he didnt recoment reboring the small bore to 3,685. there would not be much left of the sleeve he said.
it can be done but the 88 block would be better.
so i can kick myself in the a.. payed 350 for the 87 wich i have to rebore for 160 dollars or buy the 88 block for 200 and honed bored ready to rock and roll.
he said he would even throw me some standart pistons if i needed them.
the 0.020 i have to buy.for 100.

Dhadley, the machine shop guy who is 60 something years old and a very experianced mechanic told me that if i would take that much metal of the sleeves, the chanses of surviving a overheat condition will get smaller. the sleeves are weaker to withstand a overheat condition .

these were his words and it does make some sence.

does any body needs a 87 block ?140hp
0.044 over for wiseco pistons.
only needs honing.

just bought it to quick.
 

iwombat

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Re: 140 looper 1988 rebuild??

D'oh! I feel your pain.

Been there, done that.
 

Dhadley

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Re: 140 looper 1988 rebuild??

The sleeve is plenty thick enough to bore for any piston you want to use. As for heat transfer, think about it. The heat will transfer better (faster) thru less steel than more. That's the whole theory behind the Merc chrome bore motors. No steel at all.

We've done this same thing many times. Bored a small bore out to the big bore and then bored that .020 and .030 and even .040. No problem. I'd be willing to bet he's never tried it.

Look at the two blocks you have. The OD of each sleeve (big bore and small bore) is real close if not exactly the same. Again, the small bore will hold more heat than the big bore.

The V6 race guys look for the old small bore blocks to bore to big bore. They don't have heating issues.
 

reeldutch

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Re: 140 looper 1988 rebuild??

he told me he could do it but he didnt recomend it because he had a 88 block.

i guess it doesn realy matter.
i looked at the block and i agree with you that there is still plenty of steel left over.
i guess i stick with the small bore 87 block bored to std. 88
that was plan 1 any way.

first have to tear down the 88 and it is pretty salty.
good thing is i dont have to be gentle with the block.
 
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