Water pump removal on a 3.8

Technical advice Q&A

Topic author
PhilBell
Posts: 141
Joined: Sat Nov 09, 2013 1:11 pm
Location: UK
Great Britain

#1 Water pump removal on a 3.8

Post by PhilBell » Mon Apr 02, 2018 7:01 pm

Any tips on removing a 3.8 water pump?

Jaguar manual says undo the four bolts holding the pulley on, remove hoses, unbolt pump from timing cover and lift away.

No mention of the fact that the pulley, even when unbolted, can't be removed because the subrame is in the way, the pulley prevents removal of two of the bolts, and the proximity of the subframe prevents moving the pump far enough away from the timing cover for those two bolts to disengage from the timing cover.

My thoughts are turning to loosening the engine mounts etc and jacking the engine until the water pump clears the subframe. Surely there's a better way?
Phil
1962 FHC 885626

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

ralphr1780
Posts: 1064
Joined: Wed Apr 11, 2012 4:29 pm
Belgium

#2 Re: Water pump removal on a 3.8

Post by ralphr1780 » Tue Apr 03, 2018 9:09 am

PhilBell wrote:
Mon Apr 02, 2018 7:01 pm
...My thoughts are turning to loosening the engine mounts etc and jacking the engine until the water pump clears the subframe. Surely there's a better way?
Absolutely correct, this is the smartest way. Just do not forget to loosen as well the "lower nut" of the engine stabilizer rod.
Ralph
'69 OTS + '62 OTS - Belgium

Link:
BBcode:
HTML:
Hide post links
Show post links


Topic author
PhilBell
Posts: 141
Joined: Sat Nov 09, 2013 1:11 pm
Location: UK
Great Britain

#3 Re: Water pump removal on a 3.8

Post by PhilBell » Tue Apr 03, 2018 12:28 pm

Thanks Ralph. Is there anything else I should loosen or remove, such as the transmission tunnel trim, exhaust, rear propshaft flange, throttle linkage and air cleaner, or is there enough flex in those?
Phil
1962 FHC 885626

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

cdaubs
Posts: 117
Joined: Sun Jul 24, 2016 4:27 am
United States of America

#4 Re: Water pump removal on a 3.8

Post by cdaubs » Tue Apr 03, 2018 3:36 pm

While working on my '64 I have often lamented that the Jag engineers didn't give a simple 1/8th of an inch more room fore/aft and right/left in the design of the front frames. I doubt that would have made a difference in the overall design/look/function of the E-Type, but sure would have made it easier to work on!
Charlie Daubs
'64 FHC #890093

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

ralphr1780
Posts: 1064
Joined: Wed Apr 11, 2012 4:29 pm
Belgium

#5 Re: Water pump removal on a 3.8

Post by ralphr1780 » Tue Apr 03, 2018 7:35 pm

There is enough flex in all the rest. Just take it easy and slowly to get just enough of the clearance needed.
Ralph
'69 OTS + '62 OTS - Belgium

Link:
BBcode:
HTML:
Hide post links
Show post links


Topic author
PhilBell
Posts: 141
Joined: Sat Nov 09, 2013 1:11 pm
Location: UK
Great Britain

#6 Re: Water pump removal on a 3.8

Post by PhilBell » Wed Apr 04, 2018 9:02 pm

You're right Ralph

Had to jack the engine quite a way to give clearance but the pump is now on my bench and there's a smile on my face. Thank you.
Phil
1962 FHC 885626

Link:
BBcode:
HTML:
Hide post links
Show post links


64etype
Posts: 428
Joined: Sun Mar 20, 2011 2:07 pm
Location: Texas, USA
United States of America

#7 Re: Water pump removal on a 3.8

Post by 64etype » Wed Apr 04, 2018 9:17 pm

I removed and replaced the water pump (three times) last year without jacking the engine. With the pulley fasteners removed, the pulley itself can be maneuvered aside such that all pump bolts/nuts can be undone. Then wiggle the pump (with pulley) around until the magic position is achieved where the pulley can be extracted. Then the pump. It can be done.
Eric

Link:
BBcode:
HTML:
Hide post links
Show post links

Post Reply Previous topicNext topic