Pontiac Street Performance
Home | Profile | Register | Active Topics | Members | Search | FAQ

 All Forums
 Pontiac Performance
 Cooling Tech
 Coolant drips right into oil pan when filling?

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

Screensize:
UserName:
Password:
Format Mode:
Format: BoldItalicizedUnderlineStrikethrough Align LeftCenteredAlign Right Horizontal Rule Insert HyperlinkInsert EmailInsert Image Insert CodeInsert QuoteInsert List Spell Checker
   
Message:

* HTML is OFF
* Forum Code is ON
Smilies
Smile [:)] Big Smile [:D] Cool [8D] Blush [:I]
Tongue [:P] Evil [):] Wink [;)] Clown [:o)]
Black Eye [B)] Eight Ball [8] Frown [:(] Shy [8)]
Shocked [:0] Angry [:(!] Dead [xx(] Sleepy [|)]
Kisses [:X] Approve [^] Disapprove [V] Question [?]

 
   

T O P I C    R E V I E W
deez nuts Posted - 02 Aug 2018 : 12:58:06 AM
I'm having some frustrating problems with my build and since I don't have much experience with Pontiacs I really hope someone here has seen this problem before.

I have a 461 stroker which started life as I believe a 71 year block, then I used the 6x-8 heads that originally came with my car (77 T/A). I used the timing cover and everything from the 77 block which I believe should work without issue on all 400 blocks?

The engine is all together and in the car and when I started to fill the radiator with coolant it began to make a strange sound. It sounded as though the coolant was dripping through the bottom of the radiator, through the lower rad hose and somehow ending up filling the oil pan. I checked the dipstick and sure enough I'm filling the oil pan with coolant when I dump it into the radiator. I promptly drained everything and obviously did not turn the key.

Has anyone seen this before and does it make any sense? I'm new to the Pontiac world so is there something obvious that I would be missing?
13   L A T E S T    R E P L I E S    (Newest First)
deez nuts Posted - 25 Aug 2018 : 09:17:00 AM
I bought the engine used obviously and then had it bored for this project. I doubt there is an issue with the head gasket because I don't think it's taking enough water to get that high before it starts running into the pan. I figure the engine will have to come out and apart for close inspection to find the problem.

I'm hoping to buy a complete known running 400 from a member of my car club that I can put in while I sort out this issue with the engine I'm building. I'm aching to put miles on this car as I haven't driven it since I bought it and have done nothing but turn wrenches. Blahhhh...
Corncob2061 Posted - 23 Aug 2018 : 8:54:48 PM
Your going to need to pull that head off and look for the leak. You could have it sleeved if it a cylinder leak. What all have you had done to the block? Jay
Corncob2061 Posted - 23 Aug 2018 : 8:16:16 PM
That is not good. Maybe someone else will chime in. Sounds like an issue in the block. Unless your putting enough fluid to get up to the head gasket? What is the history on this engine? Was it just bored? Jay
deez nuts Posted - 23 Aug 2018 : 6:58:03 PM
So I installed the divider plate and torqued all the bolts in the timing cover and no luck. Same problem with coolant dripping into the oil pan.

I decided to investigate further and so I removed the water pump and timing cover. I verified that all the plugs and everything in the block behind the timing cover had been installed and nothing was missed.

Then I took a rubber hose with a funnel in the end of it and poured water into each of the large coolant ports separately (the coolant ports that supply coolant to the water pump).

When filling the one on the driver's side only, everything seemed normal. When filling the one on the passenger side I would get so far and then boom, leaking into the oil pan. I suspect that the only reason this would happen is a cracked block.

Is there any other possible thing this could be or should I just track down another block and go back to square one?
deez nuts Posted - 02 Aug 2018 : 8:53:29 PM
quote:
Originally posted by Corncob2061

I was thinking without the plate one of the bolts or studs could have bottomed out before the cover sealed against the block. If it looks like everything was pulled tight you will have to pull the front cover.Jay



That actually makes total sense. I'll start by getting that plate and installing it and making sure everything is tight and then see if I still have the problem. Obviously I should replace the gasket between the cover and the block but if I tighten everything down and don't have the leak when I'm just dumping coolant in a non-running engine then at least I know I found the issue.

Thanks for your time helping me out. I really appreciate it. I'll report back once I have the plate installed.
Corncob2061 Posted - 02 Aug 2018 : 09:52:22 AM
I was thinking without the plate one of the bolts or studs could have bottomed out before the cover sealed against the block. If it looks like everything was pulled tight you will have to pull the front cover.Jay
deez nuts Posted - 02 Aug 2018 : 04:09:20 AM
quote:
Originally posted by Corncob2061

It is not that obvious, can see how that could happen. You might not need to pull the front cover off then. Just inspect it put the plate on and make sure you catch all the bolts. The back plate would not leak into the engine, but it could keep the front cover from tightening up.



well the plate goes between the water pump and the cover not between the cover and the block right? I guess I don't understand how that plate missing would cause the problem?

I'll make sure all the bolts in the timing cover are tight and then I'll have to find where I can buy that plate. I just have an OEM style 11 bolt water pump I'm pretty sure.
Corncob2061 Posted - 02 Aug 2018 : 03:51:27 AM
It is not that obvious, can see how that could happen. You might not need to pull the front cover off then. Just inspect it put the plate on and make sure you catch all the bolts. The back plate would not leak into the engine, but it could keep the front cover from tightening up.
deez nuts Posted - 02 Aug 2018 : 03:34:30 AM
So like I said I'm new to Pontiacs. I realize now that I made a mistake when installing the water pump. I just bolted the water pump to the cover and it looks like theres some type of plate that goes between the two? I don't remember putting that piece in. Could that be my problem? I wouldn't think the coolant level would be high enough for that to be a problem since I had the problem before even getting one gallon in.

I feel like an idiot
Corncob2061 Posted - 02 Aug 2018 : 03:31:21 AM
Nothing to leak from the bottom, coolant has to get up to the water pump first before it can leak into the engine pan. Jay
Corncob2061 Posted - 02 Aug 2018 : 03:28:15 AM
The coolant ports go from the water pump through the front cover and into the block. I can not think of a gasket that does not work there. I will uses silicon sometimes as an extra precaution, really should be fine with or with out it though. To leak that soon it seems more likely a bolt was missed,not tightened, or the gasket shifted on assembly. Could be some corrosion on the front cover is causing a leak too.

If it leaked that soon it must be between the front cover and the block. Most of the coolant capacity is in the engine block.
deez nuts Posted - 02 Aug 2018 : 03:09:53 AM
quote:
Originally posted by Corncob2061

Gasket must be leaking between the front cover and the block? Make sure you have all the bolts in and tight. Front cover is the same between engines. How much coolant did you put in it before it leaked? Gasket wise, the lowest place it could leak into the engine is the front cover, next up head gasket, lastly the intake manifold.
Jay



I had not even put in a full gallon and it started to leak. And just to make sure I'm not misunderstanding you, you're saying the gasket that seals the timing cover to the block is leaking at the bottom?

When I replace this, is there a specific gasket that you recommend?
Corncob2061 Posted - 02 Aug 2018 : 03:04:50 AM
Gasket must be leaking between the front cover and the block? Make sure you have all the bolts in and tight. Front cover is the same between engines. How much coolant did you put in it before it leaked? Gasket wise, the lowest place it could leak into the engine is the front cover, next up head gasket, lastly the intake manifold.
Jay

Pontiac Street Performance © 2006-2017 Go To Top Of Page
This page was generated in 0.18 seconds. This Site Sponsored By:
Powered By: Snitz Forums 2000 Version 3.4.05