Cracked block??

Hotwire · Apr 2, 2012

I recently had tO do a head gasket due to an overheating. Now I notice a wet spot that comes and goes on the manifold side of the engine right under the front most exhaust port on the block. It's in the area where bolt 11 goes into the block.

Is it possible the block is cracked?

beakie · Apr 2, 2012

possible, yes, probable I would say no.

when you did the head gasket did you have the head checked for a crack? it is more likely the head has a problem as opposed to the block.

what year?
you're just up the road, I'm just east of Oshawa.

old_man · Apr 2, 2012

If I remember right, there is a freeze plug around there.

robsjeepxj · Apr 2, 2012

This ^^

GrimmJeeper · Apr 2, 2012

Doesn't the front most bolt on the head on the drivers side go through the water jacket? Or was that the back one? If so, did you silicone it before putting it in?

robsjeepxj · Apr 2, 2012

It's the front one, #11

Hotwire · Apr 2, 2012

It's a 1988 with 417000km

I had the head shaved and checked. With all good news.

I'm actually in Brantford now.

The wet spot is right under the front most exhaust port. Nearly on the front corner of the block. I'm thinking crack, or leaky water pump, or not enough sealant on headbolt number 11.

cruiser54 · Apr 2, 2012

#11 headbolt is supposed to have a sealer put on it's threads and has a different torque value than all the other head bolts.

Hotwire · Apr 2, 2012

I tq'ed it to 100 ftlb's and put the 592 PST on it, just as the manual says too. Maybe I need to put some Ultra copper on instead?

NorCalChris · Apr 2, 2012

Did you check the block for warpage or just the head?

NorCalChris · Apr 2, 2012

Here is where the freeze plug is on a renix block, quite a bit behind bolt #11.

Hotwire · Apr 2, 2012

Just the head

NorCalChris · Apr 2, 2012

Hotwire said:
Just the head

It is possible you warped the block. If you dont have two flat surfaces, your gasket might not seal properly. Did you use new head bolts? I've reused head bolts after the engine overheated, but it cost me more in the long run. Right on the block between the water pump and bolt 11 you would see it get wet.

Hotwire · Apr 2, 2012

This is where its leaking :

Hotwire · Apr 2, 2012

And yes, I reused the bolts, SO.... Ill pick up some new ones, and give them a good tightening. And see if that fixes the issue!

NorCalChris · Apr 3, 2012

Yea, where you are reporting it leaking is where the one I mentioned would leak. If you pull the head again have the block checked for warpage.

Hotwire · Apr 3, 2012

on my way to get new bolts now.

thanks

IH392 · Apr 3, 2012

I'm pretty sure I had the same problem. But mine was leaking from lower front exhaust manifold bolt. same general area that you are talking about. I'm certain that the exhaust manifold bolt hole and the head bolt hole intersect each other. My machinist didn't put any sealer on head bolt 11. when I redid it, I used the loctite thread sealant.

Hotwire · Apr 4, 2012

I pick up my headbolt set tomorrow from NAPA, Ill also pull out that manifold bolt and put some sealer on it as well. Thanks!

Hotwire · Apr 4, 2012

its most definitely cracked. New head bolts, coated #11 with teflon, as well as the exhaust manifold bolt. I dried it off, and as I tq'ed the head bolt down there was a hair line of wetness develop. When I ran it, it started to weep again.

Cracked block??

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

NAXJA Forum User

Similar threads