[chamoale2k]

14 quarts doesnt seem right usually closer to 20 qts

[chamoale2k]

Tony the ” exhaust temps” i am referering to would be the exhaust manifold temperatures. I used an infared heat gun to measure the manifold temperatures while running the boat on a seatrial. Was wondering what the exhaust manifold temperatures should be on a 6bta .

[chamoale2k]

Tony, I was able to do to engine flushes with the restore plus. Ran clean water through the engine draine it then refilled with prestone 50/50 antifreeze. Took the boat out this morning slowly working up the Rpms the water pump was replaced the new 160 degree thermostats installed. The engine temperature never went above 145 the exhaust temps at trolling the exhaust temps never went over 160. My question ow is what should the exhaust temp be at 2800 rpm? My readings were around 186.

[chamoale2k]

Thanks for the info flushed the engine cooling passages already next step is to run the restore throught it.

[chamoale2k]

Tony, I whole heartedly agree never let one get in that condition. I kinda inherated this one did the swap out then started finding all of the issues. Thanks for the inputs I’ll let you know how it turns out. So far it seems the engine did not suffer an overheat it was just the restricted flow through the exhaust manifold.I ran it in gear dockside up to 1k rpm and used a heat gun to monitor the temperatures engine stayed around 125 to 150 but the exhaust went up to low 200s. Thats what had me digging into the exhaust piping
I did back flush everything with about 60 psi water hose till I got clear water out the waterpump cavity.

1 user thanked author for this post.

Bob Patterson

[chamoale2k]

Tony have you ever used the fleetguard Restore Plus?

[chamoale2k]

Thanks Tony ordered a new thermostat from you yesterday planning on installint it and a new pump after I run some descaler thru the engine.

[chamoale2k]

Follow up start with a summary of events. Last week attempted a seatrial ,as soon as I started giving some throtle (1000) rpm the exhaust manifold started to smoke shutdown the engine then coolant started to spew from expansion tank cap. Yesterday we simulated at the dock in gear 1k rpm exhaust manifol temps got into the 200* f plus range. Today removed the circulating pump it didnt look bad then I pulled the 1 in line from the exhaust manifold to the circulating pump elbow. Dang thing was plugged. Hooked up water hose back flushed through the manifold through the block ang out the circulating pump cavity. Wont be able to get new circulating pump till tomorrow fingers crossed!

[chamoale2k]

Interesting read. Im heading to my boat going to remove coolant pump and inspect it and the internals might even run a water hose through some of the hoses to back flush the engine and see what happens.

[chamoale2k]

My 6bt overheats when I put it in gear after maybe 15 minutes running at 1000 rpm. I can run it all day in neutral at any rpm and the temps fine. My buddies that also have 6 bts keep sayin take the t stats out it will be fine so I did but the problems still there. Raw water pump impeller was just changed and it seems I have plenty of flow through that part of the system. I ccleaned the after cooler, trans oil cooler and inspected the heat exchanger. Next step is what I wanted to do while I had the coolant drained and thats to remove inspect and replace the coolant water pump. Any other thoughts would be greatly appreciated. Oh and Tony do you have 165* t stats?

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