Timing chain intermediate dumper:3.8 vs. 4.2 setup - any advantages?

Technical advice Q&A

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ysmalkie
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Location: Poland
Poland

#1 Timing chain intermediate dumper:3.8 vs. 4.2 setup - any advantages?

Post by ysmalkie » Sat Feb 15, 2020 10:13 am

There are 2 different intermediate dampers used on the 3.8 and the 4.2 engines:



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Is there any advantage of the 4.2 setup??

I am in the middle of my rebuild and I realized that my 3.8 engine must have been modified by the PO to suit the 4.2 damper. This means I can mount either one.

Any advice?
Tadek

e-type S1 3.8 FHC - in restoration phase...
Jaguar XK120 OTS
Austin-Healey 100 BN2

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rfs1957
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#2 Re: Timing chain intermediate dumper:3.8 vs. 4.2 setup - any advantages?

Post by rfs1957 » Mon Feb 17, 2020 5:59 pm

Ask Rob Beere ; the only engine parts supplier where you don't get an idiot on the 'phone, and where the guy has done the job you're about to do hundreds of times, and who will sell you the same parts as they use on their own engines.

No connection, just impressed by islands of sanity and competence in the ocean of mediocrity out there.
Rory
3.8 OTS Cream 877393 Built May 28th 1962
1978 Mini Van
(plus bevel and belt single-cylinder Ducatis)

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Topic author
ysmalkie
Posts: 173
Joined: Fri May 16, 2014 9:11 am
Location: Poland
Poland

#3 Re: Timing chain intermediate dumper:3.8 vs. 4.2 setup - any advantages?

Post by ysmalkie » Tue Feb 18, 2020 6:08 am

I actually called him yesterday.

The 4.2 setup is slightly better due to the size and position, however he also mentioned there is nothing wrong with the old design, provided the bend in the damper is strengthened by a pressed reinforcement.


Tadek
Tadek

e-type S1 3.8 FHC - in restoration phase...
Jaguar XK120 OTS
Austin-Healey 100 BN2

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Jeremy
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#4 Re: Timing chain intermediate dumper:3.8 vs. 4.2 setup - any advantages?

Post by Jeremy » Tue Feb 18, 2020 10:43 am

rfs1957 wrote:
Mon Feb 17, 2020 5:59 pm
Ask Rob Beere ; the only engine parts supplier where you don't get an idiot on the 'phone, and where the guy has done the job you're about to do hundreds of times, and who will sell you the same parts as they use on their own engines.

No connection, just impressed by islands of sanity and competence in the ocean of mediocrity out there.
:yeahthat:
Fortunately (thanks largely to this forum) I located Mr Beere's island before setting out on my restoration voyage, set a direct course, and landed on it without a hitch...
Jeremy
1967 S1 4.2 FHC

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