Re: Coolant draining out of radiator overflow tube

Posted by PM BAKER on September 15, 2011 at 17:33:04 from (24.110.108.198):

Problem came back again, frustration! I thought I had the cooling system fixed. here's how I solved the problem:

Day 1: Neighbor had a STANT COOLING SYSTEM PRESSURE TESTER ST-255. Bottom line of tests: TEST #1 tested the 7 lbs cap, it passed. Test #2 tested system with engine off, with tester pumped to 7lbs, at no loss of pressure . TEST #3 with running engine, pressure creeps up slowly to past system rating, let it go to 14 lbs and turned off engine.

RESULTS: No leaks when tested engine off, pressure slowly creeps up when engine on.

CONCLUSION: I think it's a tiny head gasket leak from the compression stroke, which would exert much more pressure than the tester can, and because the whole is small, the tester will not show anything, but piston compression can. Thus, the slow increase in cooling system pressure. I will go in and check and tighten cylinder head nuts/bolts. Hope that solves problem. If not, will have to remove head gasket. Leak is tiny, so hope tightening will do it.



Day 2: I super flushed the whole system, removing each hose one at a time and flushing through each system section. I even removed the engine drain cock, so more water would flow out of it. I ran a constant hose from the radiator and out the open engine drain (matching the inflow and out flow), while cleaning inside with a copper wire, till nothing came out but clear water. It had an oil residue in there. Might be a good idea to flush again with automatic dishwasher detergent solution once air leak is fixed.

Day 3: – tightened cylinder head to 66 lbs cold in three steps:

1) +- 45 lb with ½ pointer type torque wrench,

2) to 50 lbs with 3/8 click torque wrench

3) to 67 lbs with 3/8 click torque wrench

Manual said 70-75 lbs HOT (in 15 lb increments. Judging by tightness, it was very loose before 1st tighten. Checked online and found that Felpro’s guide for torques never has more of a spread the 8 lbs between cold and hot. The low is 3 lbs difference the high 8 lbs. Therefore worst case scenario I tightened it equivalent to hot temperature 67+ 8= 75lbs, best case 70lbs, therefore it is perfect.

Day 4: – pressure tested engine and it didn’t go up from amount I pumped in to 6lbs. Installed thermostat and ran, it went to 180 degree and never went up even at 1850 RPM. JOB COMPLETED

Replies:

Add a Reply Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Optional Video Title: Optional Video URL: Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks.   Advanced Posting Tools   Upload Photo  Select Gallery Photo  Attach Serial # List  Return to Post

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]