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#1
02-27-2020, 10:31 PM
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MR-1 block water leak ?
Has anyone had water leaking into lifter valley on mr-1 blocks ?
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#2
02-28-2020, 08:00 AM
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Are the head bolts blind in these blocks?
If not you could just have a one of the top row of head bolts leaking into the valley once pressure builds up as seen many times on SBC motors of yore. It's time to block stuff off and apply a pressure test to nail it down.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#3
02-28-2020, 09:14 AM
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IAII and MR-1 headbolt holes aren't in the water jackets.
__________________
1967 Firechicken, 499", Edl heads, 262/[email protected]" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. [email protected] mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#4
02-29-2020, 11:53 AM
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Guess that answers my question about which block i'm gonna order.
If there is enough porosity to leak like that, I just cant imagine that the strength isnt compromised. |
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#5
02-28-2020, 09:22 AM
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I believe they have a pipe plug fitting in there and they just flat mill it. Its the same as the IA2 set up. Good luck.
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#6
02-28-2020, 10:30 AM
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Water leak
YES a friend just had BES build him a super stock engine with a MR1 block and it leaked water in the lifter galley
greg |
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#7
02-29-2020, 12:08 PM
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This is not a porosity problem, I believe they put a pipe plug in there to seal the hole from removing the sands from the casting process. IA2 is the same procedure. I would let them know first before you go crazy on your options. Good luck.
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#8
02-29-2020, 12:34 PM
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Quote:
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#9
02-29-2020, 12:44 PM
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I have never built an MR1 block. But I have worked with plenty of castings that have some little "fizzers". That's what we call the tiny imperfections that will "fizz tiny bubbles" when you pressure test the casting. Typically, as the casting heats, they get a little worse and can put a little water in the oil. Very common in iron castings. Typically, in production engines, they will rust themselves shut rather quickly in a passenger car engine and it isn't worried about. For GM, the problem became serious for the first time with the Cadillac HT 4100 aluminum block/iron head engine. They wouldn't self-seal because of the aluminum block.
GM developed cooling system tablets for this issue and installed 6 of them in every Cadillac on the assembly line. I have some even better sealer, it is a powder not available in the general market. If the OP wants to PM me, I can provide some more info. IMO, it's a better alternative to block replacement on a fully prepared race block. Another option is to have the internal surfaces of the casting sealed with a pressure ceramic sealer. That cost a few hundred bucks. |
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#10
03-01-2020, 11:09 AM
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OK, since the question of coolant leaks, in the KRE block, has been brought up...
What have the problems been with the IA2 blocks? |
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#11
02-29-2020, 03:09 PM
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Quote:
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#12
02-28-2020, 10:50 AM
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Got one that leaks at casting marks between the deck and lifter valley. It leaks at 6 spots.
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#13
02-28-2020, 10:51 AM
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You guys should contact KRE.... I'm sure they'll make it right.
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#14
02-28-2020, 11:01 AM
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Quote:
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#15
02-28-2020, 11:32 AM
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Quote:
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#16
02-28-2020, 11:48 AM
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You would think there would be some qc on castings before being shipped.
Last edited by gene simmons; 02-28-2020 at 12:17 PM. |
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#17
02-28-2020, 12:29 PM
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They should make it right if there is a problem. I doubt you will get any money back for parts or machine work as it probably should have been pressure tested from the start. For the most part race parts cary no warranty.
__________________
Be carefull of the feet you step on today.They may be attached to the a$$ you kiss tomorrow. |
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#18
02-29-2020, 02:48 PM
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When I first got my IA2 block, it looks like a thread is exposed to where it was leaking. So I figured they put a pipe plug there and milled it. But I didn't like a fix for a brand new block so Frank took care of me and gave me another block. But I could be wrong. Only guys that can tell us are KRE for sure.
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#19
02-29-2020, 05:33 AM
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Quote:
__________________
Just a blind squirrel looking for a nut. |
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#20
02-28-2020, 11:11 AM
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Mine did it in Vegas last year between races. Was fast at the first race and it kept slowing at the second race. Thought a bearing was going away took the filter apart and saw coolant, must've had 3 quarts of coolant in the crankcase. Long story short took the motor apart when I got home could see the trail in the valley but couldn't really see anything in the deck. When I put it back together I saw a hairline casting flaw so I smeared clear RTV the spot it going to get stop leak when I get it running again. I put stop leak in it when it happened and that did stop the leak.
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