rod knock / well here goes my story

[Dan Swanson]

Originally Posted by srzsmack

im certain the head gasket has been replaced. whats with this crank pulley idea.. is it common? and also if i did find the right bearings would i be fine cuz all im trying to do is make it last long enough since im ready to do an engine swap if it really is that bad. like i said it wasnt knocking until i drove it home and there definatley was oil and the pressure was fine. i took it to my mechanic and he said yeah that sounds exactly what a spun rod bearing sounds like. im really curious about this whole crank pulley thing now.

Tony gave you good advice. Regarding the crank pulley. I have an '87 MKIII, n/a. I have replaced the crank pulley three times in less than 150K miles. I bought the Supra with 38K miles. The the first time I bought a new pulley and bolt and had to run a tap into the crank to repair thread damage. Red Loctite was used on the bolt threads and properly torqued. It came lose again and agaim the third time I had to have the front of the crank welded and grounded down..

I wished I had a clue why all the trouble? The sound with a loose pulley is like the sound of a rod knock or even a cracked crank.

If you do not have one you need buy Toyota Supra Repair Manual. I am not sure if the TSRM calls for Loctite or a thread lock on the bolt or not.

Be sure and refer to all torque specs when performing service. If you over tighen you could easily end up with broken bolt. Then you have more truoble.

Good luck .

Dan Swanson

[srzsmack]

yeah is there a test to determine if it is the pulley or not? cuz ive had cars with rod knock before...

[Dan Swanson]

Not a test per se. You need to inspect the pulley and check the bolt to see it is loose.

Due tihe knocking sound you may have damage the pulley and the crank, due a good visual inspection to determine exactly what you need to do to correct the problem. Upon on re-assembly be sure and properly TORQUE the bolt to 195 ft lbs per TRSM manual. Use red Loctie or an equivalent strenth thread locker.

The first time I had a problem the crank pulley ( harmonic balancer) was so loose it through the belts and heated up and I had water spraying on the windshield.

This happend while driving on the interstate at metro speeds. I was able to tighten it back up. And continued my trip at low rpm's and stopped at a dealershio and orded a balancer and bolt. However the old bolt danaaged the threads in the crank. I was able to chase the threads with an 18MM tap.

Good Luck, if I can be more assistance, just ask.

Dan Swanson

Originally Posted by srzsmack

yeah is there a test to determine if it is the pulley or not? cuz ive had cars with rod knock before...