|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
05-25-2019, 05:57 AM | #1 |
Senior Member
Join Date: Feb 2019
Location: Pittsburgh PA.
Posts: 130
|
y-block running warm?
hi guys! finally have been able to enjoy driving the "rat".
after all she put me thru... anyway, I noticed she is running a little hotter than before I rebuilt her. prior to rebuild it ran 180! now it's up to 210! the engine is basically stock, except for "trips". std.bore. std.cam. it has an electric fan, comes on 205-210. radiator is new. i'am running a 180 thermo. anybody have any thoughts? as always, I appreciate everyones replys! richard |
05-25-2019, 06:08 AM | #2 |
Senior Member
Join Date: Sep 2014
Posts: 160
|
Re: y-block running warm?
Did you get the head gaskets on with front at the front?
|
Sponsored Links (Register now to hide all advertisements) |
|
05-25-2019, 06:53 AM | #3 |
Senior Member
Join Date: Feb 2019
Location: Pittsburgh PA.
Posts: 130
|
Re: y-block running warm?
Yes sir! Forgot to mention my timing, 8 degrees initial. About 38 total.total. running 52 jets in the center carb.Plugs look good have a nice light tan color.
|
05-25-2019, 07:14 AM | #4 |
Senior Member
Join Date: Feb 2019
Location: Pittsburgh PA.
Posts: 130
|
Re: y-block running warm?
since head gaskets were brought up, I just rememberd
I use "felpro". they recommend "cooling fix". drill 2-holes in block, and 2- matching in head. I did this! this is the only change I made in rebuild. |
05-25-2019, 10:53 AM | #5 |
Senior Member
Join Date: Aug 2012
Location: Abq, NM
Posts: 3,607
|
Re: y-block running warm?
Did you remove the freeze plugs and clean out the block? Pictures at the bottom of this linked page. The page was written for '55/'57 T-Birds but it generally applies to all Y-block engines.
There is a short list of common overheating causes. https://www.ctci.org/gilsgarage/Overheating.php . Last edited by dmsfrr; 05-25-2019 at 11:10 AM. |
05-25-2019, 11:51 AM | #6 |
Senior Member
Join Date: Feb 2019
Location: Pittsburgh PA.
Posts: 130
|
Re: y-block running warm?
Sponsored Links (Register now to hide all advertisements)
|
05-25-2019, 02:18 PM | #7 |
Senior Member
Join Date: Feb 2012
Location: Tampa fl
Posts: 133
|
Re: y-block running warm?
Just a thought, remove the thermostat and drive it. Maybe the thermostat is hanging up. What carb are you running 52 jets in?
|
05-25-2019, 03:16 PM | #8 |
Senior Member
Join Date: Feb 2019
Location: Pittsburgh PA.
Posts: 130
|
Re: y-block running warm?
Ctr.carb #52. Out board #49
|
05-25-2019, 04:12 PM | #9 | |
Senior Member
Join Date: Aug 2012
Location: IN A 'GALAXIE' FAR FAR AWAY
Posts: 6,475
|
Re: y-block running warm?
Quote:
Maybe re-calibrate the fan(s) to come on sooner? If calibrated to cut in at 180 degrees or higher, it may be waiting too long to actually cool the coolant. Are the fans using a coolant temp or ambient air temp sensor to trip them? Do the fan(s) have a manual over-ride switch whereby you can cut them on earlier? Do you have a TEMP GUN or are you relying on the OEM TEMP GAUGE? |
|
05-25-2019, 04:16 PM | #10 |
Senior Member
Join Date: Feb 2019
Location: Pittsburgh PA.
Posts: 130
|
Re: y-block running warm?
Temperature sending unit. To turn fan on its preset. I have dolphin gauges they're quite accurate.
|
05-25-2019, 04:22 PM | #11 |
Senior Member
Join Date: Aug 2012
Location: IN A 'GALAXIE' FAR FAR AWAY
Posts: 6,475
|
Re: y-block running warm?
A coolant temp sensor, correct? Where did you mount it in the engine? Do your fan instructions describe installing a manual over-ride switch? Where is the GUAGE sensor located?
|
05-25-2019, 04:25 PM | #12 |
Senior Member
Join Date: Aug 2012
Location: IN A 'GALAXIE' FAR FAR AWAY
Posts: 6,475
|
Re: y-block running warm?
|
05-25-2019, 04:55 PM | #13 |
Senior Member
Join Date: Feb 2019
Location: Pittsburgh PA.
Posts: 130
|
Re: y-block running warm?
I did not install temp.sensor, came that
Way. It's front of manifold. |
05-25-2019, 05:13 PM | #14 | |
Senior Member
Join Date: Aug 2012
Location: IN A 'GALAXIE' FAR FAR AWAY
Posts: 6,475
|
Re: y-block running warm?
Quote:
The electric fan(s) came installed with your purchase of the car? The cooling systems functioned correctly before the rebuild and not now? The FAN COOLANT TEMP SENSOR is mounted in the intake manifold crossover in place of the heater control valve or elbow (depending on heater style)? What degree THERM was installed before rebuild and is the replacement a full-flow style? Where is the TEMP GAUGE sender placed? |
|
05-25-2019, 06:15 PM | #15 |
Senior Member
Join Date: Jun 2010
Location: Detroit suburb, MI
Posts: 3,706
|
Re: y-block running warm?
Richard, you mentioned in post #6 about backing off on the timing. I wouldn't do that since more spark advance makes cooler exhaust temperatures. Retarding the timing from where it is now, will increase exhaust temps. This would only potentially cause it to run warmer than it is now.
Sal |
05-25-2019, 06:41 PM | #16 |
Senior Member
Join Date: Feb 2019
Location: Pittsburgh PA.
Posts: 130
|
Re: y-block running warm?
Great to hear from you sal! You
Always have good replies! What do think Of jetting up CTR. Carb. To 54? The Pics.of the is not very good.. |
05-25-2019, 08:04 PM | #17 |
Senior Member
Join Date: Jun 2010
Location: Detroit suburb, MI
Posts: 3,706
|
Re: y-block running warm?
Your spark plugs sound like they are pretty ideal as far as color. 52 jets in the center carb should be good. Stock carbs had 50 or 51's (assuming they are Holley 94's).
If anything, if the power system is blocked off in the front and rear carbs, the jet size should be increased to about 54 or 55. I think you said they had 49 jets. However, if it runs well when the front and rear carbs open up, then maybe good the way it is. Sal |
05-25-2019, 09:35 PM | #18 |
Senior Member
Join Date: May 2010
Location: Southern California
Posts: 7,032
|
Re: y-block running warm?
I had a '57 Bird with a heating problem. Turned out to be a reputed diaphragm in the vacuum advance unit. I picked up on it when I noticed that the power "pulsed" when driving about 35 MPH. Might consider it as a possibility.
Charlie Stephens |
05-25-2019, 09:51 PM | #19 |
Senior Member
Join Date: Feb 2019
Location: Pittsburgh PA.
Posts: 130
|
Re: y-block running warm?
I am running an MSD ready to run distributor with a vacuum advance... All three carburetors are the 94 models. The 2 out boards don't have any power valves in
Them. I am a little suspect, it's running a little to Lean? The plugs do have some tan color but they look a little whitish to me. Sal, do you have a pair of 54 Jets? I know you're quite knowledgeable with these old carburetors. If you do,message me... |
05-26-2019, 11:35 AM | #20 |
Senior Member
Join Date: Jun 2010
Location: Detroit suburb, MI
Posts: 3,706
|
Re: y-block running warm?
I don't have any Holley jets that size but they are available on EBAY with free shipping for about $6 a pair. That's cheaper that you can get them from Holley or anywhere else I've seen. Pretty sure I sent you a link to an EBAY auction a little while back.
Sal |
05-26-2019, 01:14 PM | #21 |
Senior Member
Join Date: Feb 2019
Location: Pittsburgh PA.
Posts: 130
|
Re: y-block running warm?
Thanks....
|
05-27-2019, 01:19 PM | #22 |
Senior Member
Join Date: Jun 2010
Location: Sioux City Iowa
Posts: 196
|
Re: y-block running warm?
I agree with Sal on the advance diaphragm. An old friend of my dad's had this nice square bird. The car would over heat when ever he drove it. He spent a lot of money chasing that problem and he was a penny pincher, smh. He finally took the car to a certified mechanic and was expecting to fork out big money to finally fix the car. Parts and labor was less than $35.00 in the late 90's. He didn't have anything to whine about after that.
|
Sponsored Links (Register now to hide all advertisements) |
|
05-27-2019, 03:26 PM | #23 |
Senior Member
Join Date: Aug 2012
Location: Abq, NM
Posts: 3,607
|
Re: y-block running warm?
You can easily test the vac adv diaphragm on a dist with a longish piece of clean vacuum hose.
Connect one end to the canister then put the other end in your mouth and blow into the tube, it should hold pressure and not leak thru. If it leaks replace the vacuum canister. Sucking on the tube should rotate the points/breaker plate approx 1/4 to 3/8 inch (yellow arrows) it may need to be cleaned & lubed if it's stuck. this example photo is of a '55 distributor but the principle is the same Last edited by dmsfrr; 05-30-2019 at 07:46 AM. |
|
|
Sponsored Links (Register now to hide all advertisements) |
|