3.0L leak...possible 4.3L swap - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 12-12-2001, 10:19 AM   #1 (permalink)
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3.0L leak...possible 4.3L swap

I have a leak in my 3.0L that I can not seem to track down. I have replaced the waterpump and reseated the thermostat housing, but the leak still remains. The engine has overheated in the past. What could be causing the problem? It leaks very fast.

Also, if the problem is the worst of all possibilities = cracked block. Then, what does it take to swap it with a 4.3L? What are the benefits of the swap? Does someone make adapters for my transmission?
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Old 12-12-2001, 10:40 AM   #2 (permalink)
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Napa has a dye you add to your oil. Then you look for the leak with a black light. The oil will shine.
This worked well for me. It was my valve covers.
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Old 12-12-2001, 10:45 AM   #3 (permalink)
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Re: 3.0L leak...possible 4.3L swap

Quote:
Originally posted by Shaggygto
I have a leak in my 3.0L that I can not seem to track down. I have replaced the waterpump and reseated the thermostat housing, but the leak still remains. The engine has overheated in the past. What could be causing the problem? It leaks very fast.

Also, if the problem is the worst of all possibilities = cracked block. Then, what does it take to swap it with a 4.3L? What are the benefits of the swap? Does someone make adapters for my transmission?
I'm guessing it's a coolant leak you're talking about.

Other possibilities include, but are not limited to, freeze plugs, head gasket, cracked head. I'm not familiar too with the 3.0, but some engines circulate coolant through the intake manifold, so that is another source for a leak.

Is there a puddle created by the leak?
Does the oil appear light brown and milky?
Is the exhaust noticeably white?

As for the swap, do a search, as the subject hsa come up numerous times.
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Old 12-12-2001, 11:21 AM   #4 (permalink)
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Re: Re: 3.0L leak...possible 4.3L swap

Quote:
Originally posted by fourwd1


I'm guessing it's a coolant leak you're talking about.

Other possibilities include, but are not limited to, freeze plugs, head gasket, cracked head. I'm not familiar too with the 3.0, but some engines circulate coolant through the intake manifold, so that is another source for a leak.

Is there a puddle created by the leak?
Does the oil appear light brown and milky?
Is the exhaust noticeably white?

As for the swap, do a search, as the subject hsa come up numerous times.
You are correct in assuming it is a water leak.

I will have to check on those symptoms. However, if my memory serves me correctly the oil looks fine and the exhaust is clear. However, the only puddle that forms is on the ground as the water looks as if it is draining off the front of the block somewhere.
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Old 12-12-2001, 03:30 PM   #5 (permalink)
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If it has overheated then it is possible you have warped a gasket surface. If you do manage to find the surface then you can probably fix it with silicone. As far as the 4.3 swap there is lots of info out there. I personally would go with the 3.4 litre. it's a way better engine than the 3.0 and gets better gas milage. Strap on a supercharger and it can't be beat.

Check these out
http://www.geocities.com/humboldttoyota/5vzfeswap.html
http://www.outdoorwire.com/4x4/toyota/tech/supra/
http://www.ozemail.com.au/~jonhel5/ho.htm

I have some 4.3 links, I will post em when I find them
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Old 12-12-2001, 03:51 PM   #6 (permalink)
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http://www.off-road.com/toyota/tech/other/v6swap.html
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Old 12-12-2001, 03:55 PM   #7 (permalink)
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I have an 88 4 runner v6.
I am swapping in a 4.3 and have the bell housing(AA), clutch, flywheel, motor mounts. basically every thing you would need to put a 4.3 in front of your trannie. I have changed my mind and will be using a sm420 instead. every thing is new and for sale.
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