Timing Belt and Water Pump Replacement DIY Question

newbee mechanic · 05-21-08, 07:27 AM

I've read all the threads on the subject (Extremely helpful)
I've got the FSM pages.
I 've got all the parts.
And I have the tools.

But I have one nagging question.

To use or not use gasket sealant on the water pump?

The gasket already seems to have some sealant on it.
The FSM does not mention any additional sealant use.
But most threads seem to mention use of additional sealant.

Has anybody done it without the sealant?
How is yours holding up with or without the sealant?
Could the additional sealant actually contaminate the
cooling system?

If I do use sealant, is this the correct one to use?
High temp RTV Silicone Sealant.

spressomon · 05-21-08, 08:44 AM

I just used the factory OEM Toyota gasket for the water pump: No issues since doing it 26K ago. While you're in there so to speak you might want to either re-brush/re-build/replace your starter. Symptoms seem to start around the 100-120K mark for some 100's.

socalsuv · 05-21-08, 08:45 AM

I opted for no sealant when I replaced mine about a month ago...just the brand new gasket. No problems / leaks. Just make sure you remove all traces of deteriorating black rubber that sticks to the block from the old water pump gasket. There were a few spots I had to work on for quite a while with a razor blade. I finished the cleanup with some carb clearner / degreaser on a rag and wiped down the mating area.

You will need the sealant for the water inlet housing mating area. I used the blue RTV stuff.

Trunk Monkey · 05-21-08, 08:50 AM

I (we) didn't use sealant on the water pump when mine was replaced, just cleaned the block surface really well. If you do use sealant get a tube of Toyota FIPG (form in place gasket).

newbee mechanic · 05-21-08, 11:29 AM

Given the distinguished panel of respondents, no sealant it is.
I feel lot better, not using it actually.

Yes, I will use sealant on the inlet housing.

spressomon,
I already got the starter contacts replaced out of necessity. Thanks to you. Your FAQ writeup is what I followed. The pictures really made the difference for me. Oh and btw, again, thanks to you, I got the cv joint finally done. I actually shot videos. I will post them soon, maybe you can have a chuckle or two. Or more.

Thank you guys.

05-21-08, 07:27 AM	#1
newbee mechanic IH8MUD Rookie Join Date: Mar 2008 Location: New Jersey Posts: 29	Timing Belt and Water Pump Replacement DIY Question I've read all the threads on the subject (Extremely helpful) I've got the FSM pages. I 've got all the parts. And I have the tools. But I have one nagging question. To use or not use gasket sealant on the water pump? The gasket already seems to have some sealant on it. The FSM does not mention any additional sealant use. But most threads seem to mention use of additional sealant. Has anybody done it without the sealant? How is yours holding up with or without the sealant? Could the additional sealant actually contaminate the cooling system? If I do use sealant, is this the correct one to use? High temp RTV Silicone Sealant. Last edited by newbee mechanic; 05-21-08 at 01:48 PM.

05-21-08, 08:44 AM	#2
spressomon IH8MUD Lifer Join Date: Jan 2005 Location: Reno Posts: 4,606	I just used the factory OEM Toyota gasket for the water pump: No issues since doing it 26K ago. While you're in there so to speak you might want to either re-brush/re-build/replace your starter. Symptoms seem to start around the 100-120K mark for some 100's. __________________ Modded '99 for on-trail exploring: 315's, 4.88's, AO drawers, Slee rr, TJM fr, ARB fr locker, good music for ears, Waeco CF-50, PowerGate with 2nd battery, home brew tube type sliders & t-case skid plate, 9.5XP/X-line, LF 170's, OEM 864's, Fox 2"remotes at each corner, 12mm body lift... KE7NCM

05-21-08, 08:45 AM	#3
socalsuv mmm.....beer. Join Date: Mar 2008 Location: Marina Del Rey, CA Posts: 66	I opted for no sealant when I replaced mine about a month ago...just the brand new gasket. No problems / leaks. Just make sure you remove all traces of deteriorating black rubber that sticks to the block from the old water pump gasket. There were a few spots I had to work on for quite a while with a razor blade. I finished the cleanup with some carb clearner / degreaser on a rag and wiped down the mating area. You will need the sealant for the water inlet housing mating area. I used the blue RTV stuff. __________________ ~~~~~~~~~~~~~~~~~~ '01 LX 470, stock except for Milford Cargo Barrier

05-21-08, 08:50 AM	#4
Trunk Monkey IH8MUD Lifer Join Date: Apr 2003 Location: Salt Lake City TLCA# 11251 Posts: 2,485	I (we) didn't use sealant on the water pump when mine was replaced, just cleaned the block surface really well. If you do use sealant get a tube of Toyota FIPG (form in place gasket). __________________ Cory Fillmore TLCA Western Individual Representative 99 UZJ

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05-21-08, 11:29 AM	#5
newbee mechanic IH8MUD Rookie Join Date: Mar 2008 Location: New Jersey Posts: 29	Given the distinguished panel of respondents, no sealant it is. I feel lot better, not using it actually. Yes, I will use sealant on the inlet housing. spressomon, I already got the starter contacts replaced out of necessity. Thanks to you. Your FAQ writeup is what I followed. The pictures really made the difference for me. Oh and btw, again, thanks to you, I got the cv joint finally done. I actually shot videos. I will post them soon, maybe you can have a chuckle or two. Or more. Thank you guys.